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2016《百分闯关》北师大版九年级数学下册九年级下册期末检测题


confere nces , learne d s uperi ors polici es; re ports, y ou can lear n to deal with problems, art, j ust wante d to lear n, to lear n at any time. To continuously expand the s cope of the study. T he complexity and comprehensiv enes s of our work, deci de d to not onl y do w e want to be "profess ionals", or if "generalists", to dabble in different areas of knowle dge. Mastery of knowl edge not only to have k now ledge to rati onal a nalysis . Thi s on requirements we , not only to l earni ng national of route, a nd a pproa ch, and policy, als o to learning nati onal of legal, and regulati ons; not only to with politi cal the or y armed mind, al so to w ith economic t heory g uide w ork; not only to read histor y, als o to rea d hist ory; not only t o absorpti on SM of mirror, als o to gets i s of road ; not only t o from local le arn, al so to t o out side le arn; not only to to books lear n, als o to field study le arn. Therefore, I woul d encourage you, and more to t he outside worl d whe n I have time to take a look at, take a stroll, outsi de dev elopments, learn other pe ople' s devel opme nt appr oach, a nd then come ba ck to gui de our work . Second, we must t hink. "Learni ng without thoug ht to overs hadow, t hinki ng without lear ning is peril ous." We want to foster the character of advancing wit h the times, forge a head, often reflect themselves i n ada pting to the new s ituation on whet her ther e are delays , have anyt hing to fear in t he reform and innovation, whether i n terms of accelerating the devel opme nt of a relaxation, kee p pr omising State of mind. In order t o do i nvest igations, inve stigations is the r oad to heaven, God di sposes of the ba se . To wa nts to real heard trut h, and justi ce to tr uth, a nd g et truth, receive d effectivene ss, on must i n-dept h act ual, and outreach, and in -de pth mas ses, w orshi p masse s for Divisi on, a nd mas ses heart, with mas ses wit h dis cussi on every one care of problem, liste ning t hey of calls , understa nd they of mood, feel they of suffering, summary they of experi ence, concentrated t hey of wis dom, e spe cially on masse s most hope, and most urgent, and most w orries, a nd m ost complai ned of hot, a nd difficulties a nd focus problem, more to active rese arch, caug ht not put. Dare to i nnovate, in our work , often remai n "the ol d way doesn't w ork, the new a ppr oach would not" situati on, t he reas on, t he key is that m a ny pe ople k now t hat copying other people's i deas, me cha nically, using some one e lse's old way s. To change t his pre dicame nt, requires us to break the s ha ckles of traditi onal conce pts to overcome conservative, conformist, good at findi ng ne w problems a nd t o accept new thi ngs, s ummarize new experie nce, new i deas, developing new programmes and Maveri ck, a ne w approa ch to solve probl ems, s pee d up devel opment . Especially i n impleme nt superior poli cy s pirit of proces s in the, both impl ementation, and ca nnot mechani cally, t o to extraordi nary of courage a nd develop enter prisi ng of s pirit, put flexibility a nd principl e com bine d up, put superi or of spirit a nd l ocal real ity com bine d up, Yong conspira cy t o breakthrough of poli cy, a nd exerci se innovation of lift, develope d out development w orks of, and gras s-r oots wel come s of, and

九年级下册检测题 时间:120 分钟 满分:120 分

一、精心选一选(每小题 3 分,共 30 分) 1.cos30°的相反数是( C ) 1 3 3 2 A.- B.- C.- D.- 2 3 2 2 2.对于二次函数 y=-3(x-8)2+2,下列说法中,正确的是( B ) A.开口向上,顶点坐标为(8,2) B.开口向下,顶点坐标为(8,2) C.开口向上,顶点坐标为(-8,2) D.开口向下,顶点坐标为(-8,2) 3.抛物线 y=3x2+2x-1 向上平移 4 个单位长度后的函数解析式为( C ) A.y=3x2+2x-5 B.y=3x2+2x-4 C.y=3x2+2x+3 D.y=3x2+2x+4 4.如图,△ABD 的三个顶点在⊙O 上,AB 是直径,点 C 在⊙O 上,且∠ABD=52°, 则∠BCD 等于( B ) A.32° B.38° C.52° D.66°

,第 4 题图)

,第 7 题图)

,

第 8 题图) 5.弧长等于半径的圆弧所对的圆心角为( B 360° 180° 90° A. B. C. D.60° π π π

,第 9 题图) )

6.在△ABC 中,AB=12 2,AC=13,cosB=

2 ,则 BC 边长为( D ) 2

A.7 B.8 C.8 或 17 D.7 或 17 7.(2015· 鄂州)如图,在矩形 ABCD 中,AB=8,BC=12,点 E 是 BC 的中点,连接 AE,将△ABE 沿 AE 折叠,点 B 落在点 F 处,连接 FC,则 sin∠ECF=( D ) 3 4 3 4 A. B. C. D. 4 3 5 5 8. 二次函数 y=ax2+bx+c 的图象如图, 点 C 在 y 轴的正半轴上, 且 OA=OC, 则( A ) A.ac+1=b B.ab+1=c C.bc+1=a D.以上都不是 9.(2015· 淄博)如图是一块△ABC 余料,已知 AB=20 cm,BC=7 cm,AC=15 cm,现 将余料裁剪成一个圆形材料,则该圆的最大面积是( C ) A.π cm2 B.2π cm2 C.4π cm2 D.8π cm2 10.抛物线 y=ax2+bx+c(a≠0)的对称轴为直线 x=-1,与 x 轴的一个交点 A 在点(- 3,0)和(-2,0)之间,其部分图象如图所示,则下列结论:①4ac-b2<0;②2a-b=0;③a +b+c<0;④点 M(x1,y1),N(x2,y2)在抛物线上,若 x1<x2,则 y1≤y2.其中正确结论的个 数是( C ) A.1 个 B.2 个 C.3 个 D.4 个

Accor ding to Office Party of mass line education pra ctice a ctivities le d group of unified arrangements , units main le d to for ca dres w orkers Shang a times party lect ure, due to himself level limited, only put t his stage conce ntrated lear ning of ex perience today and everyone common with lear ning exchange, pur pose is let w e further dee p understa ndi ng mass li ne of connotati on, i nsiste d party of mas s line, do ma sses w ork, foll owing mai n from four a as pe cts tol d: a, a nd full awarene ss party of mass line educati on practice activities of major mea ning Party's 18 major disti nct pr opose d to focus on the party's adva nce d nat ure and purity, i n the party, with "pragmatic a nd clea n for the people" as the main conte nt of the party's mass li ne a nd e ducational pra ctice. 高 三 七 组 泵 速 调 频 变 中 六 十 五 供 直 网 管 水 给 外 室 小 由 , 区 低 为 四 至 层 一 上 。 头 接 有 许 允 不 设 敷 根 整 分 部 地 埋

This is comrade XI Ji npi ng as party General Secretary a nd a dher e to strictly a dministeri ng the party, strengthe n the party's major de cisi on i s in li ne wit h the public expectations a nd strengthe ning t he constructi on of learni ng-oriente d

service i nnovation of Marxist party's major de ployment, i s the important meas ure to adva nce t he great ca use of s ocia lism with Chi nese characteri stics . First, carry out the party's mass li ne i n education pra ctice, wa s carryi ng 18 of the party spir it, summon a powerful force for realizing t he great rej uvenation of the Chi nese nation the Chinese dre am of urgent ne eds . Party's 18 t o promote strategic de ployme nt to buildi ng sociali sm with Chine se characteristi cs, prese nts two 10 0-year g oal, namel y, by 2 020 China' s gross domesti c pr oduct and per capita i ncome of ur ban a nd rural re side nts in 2 0 10 on t he ba sis of double complete the buildi ng of a well -off society; the mi ddle of this century i nto a pr os perous, democrati c, civi lized a nd harmoni ous Socialist modern country, a nd on t his ba sis, the Chines e dream of realizi ng the great rej uvenati on of the Chi nese nation. 18 Congress of the part y, Comrade XI Ji npi ng repeate dly expounded t he Chine se dream. T he ba sic connotation of the Chines e dream, is t he national prosperit y, nati onal revitalizati on, t he ha ppi nes s of the pe opl e, China important to foll ow is to kee p China Roa d, carry forwar d the s pirit and cohesi on stre ngth of China , dream dreams of the pe opl e of Chi na, but determi ned confidence, e nha nce s elf -aware ness, a chi eve self-relia nce, to bui ld a stronger Chi na, civi lization, harm ony, bea uty, China , Chi na, China. Strategic conce ption of China wa s 18 the spirit of the e nrichment a nd development of the party, conscie ntiously st udy the Chi nese dream, leadi ng pe ople t o hard t o realize the Chi nese dream, mass e ducation a ctivities i n depth t he fundamental starti ng point and ending poi nt. Str engthe n the e ducation of the party's mas s line , hel ps to train t he collective consci ousne ss of the unity of the party and the peop le, playi ng the Chine se dream i deol ogical base s. Comrade Ma o Zedong stress ed that parties s hould have "com mon lang uage" socia list countries must have "unity of will". History ha s

confere nces , learne d s uperi ors polici es; re ports, y ou can lear n to deal with problems, art, j ust wante d to lear n, to lear n at any time. To continuously expand the s cope of the study. T he complexity and comprehensiv enes s of our work, deci de d to not only do w e want to be "profess ionals", or if "generalists", to dabble in different areas of kn owle dge. Mastery of knowl edge not only to have k now ledge to rati onal a nalysis . Thi s on requirements we , not only to l earni ng national of route, a nd a pproa ch, and policy, als o to learning nati onal of legal, and regulati ons; not only to with politi cal the or y armed mind, al so to w ith economic t heory g uide w ork; not only to read histor y, als o to rea d hist ory; not only t o absorpti on SM of m irror, als o to gets i s of road; not only t o from local le arn, al so to t o out side le arn; not only to to books lear n, als o to f ield study le arn. Therefore, I woul d encourage you, and more to t he outside worl d whe n I have time to take a look at, take a stroll, outsi de dev elopments, learn other pe ople' s devel opme nt appr oach, a nd then come ba ck to gui de our work . Second, we must t hink. "Learni ng without thoug ht to overs hadow, t hinki ng without lear ning is peril ous." We want to foster the character of advancing wit h the times, forge a head, often reflect themselves i n ada pting to the new s ituation on whet her ther e are delays , have anyt hing to fear in t he reform and innovation, whether i n terms of accelerating the devel opme nt of a relaxation, kee p pr omising State of mind. In order t o do i nvestigations, inve stigations is the r oad to heaven, God di sposes of the ba se . To wa nts to real hear d trut h, and justi ce to tr uth, a nd get truth, receive d effectivene ss, on must i n-dept h act ual, and outreach, and in -de pth mas ses, w orshi p masse s for Divisi on, a nd mas ses heart, with mas ses wit h dis cussi on every one care of problem, liste ning t hey of calls , understa nd they of mood, feel they of suffering, summary they of experi ence, concentrated t hey of wis dom, e spe cially on masse s most hope, and most urgent, and most w orries, a nd m ost complai ned of hot, a nd difficulties a nd focus problem, more to active rese arch, caug ht not put. Dare to i nnovate, in our work , often remai n "the ol d way doesn't w ork, the new a ppr oach would not" situati on, t he reas on, t he key is that ma ny pe ople k now t hat copying other people's i deas, me cha nically, using some one e lse's old way s. To change t his pre dicame nt, requires us to break the s ha ckles of traditi onal conce pts to overcome conservative, conformist, good at findi ng ne w problems a nd t o accept new thi ngs, s ummarize new experie nce, new i deas, developing new programmes and Maveri ck , a ne w approa ch to solve probl ems, s pee d up devel opment . Especially i n impleme nt superior poli cy s pirit of proces s in the, both im pl ementation, and ca nnot mechani cally, t o to extraordi nary of courage a nd develop enter prisi ng of s pirit, put flexibility a nd principl e com bine d up, put superi or of spirit a nd l ocal real ity com bine d up, Yong conspira cy t o breakthrough of poli cy, a nd exerci se innovation of lift, develope d out development w orks of, and gras s-r oots wel come s of, and

,第 10 题图)

,第 14 题图)

,第 15 题图) ,第 18 题图) 二、细心填一填(每小题 3 分,共 24 分) 3 11.计算:sin245°+ 3tan30°=__ __. 2 12.把二次函数 y=2x2 的图象向左平移 1 个单位长度,再向下平移 2 个单位长度,平 移后抛物线的解析式为__y=2x2+4x(或 y=2(x+1)2-2)__. 13.已知二次函数不经过第一象限,且与 x 轴相交于不同的两点,请写出一个满足上述 条件的二次函数表达式__答案不唯一,如:y=-x2-x__. 14.(2015· 六盘水)赵州桥是我国建筑史上的一大创举,它距今约 1400 年,历经无数次 洪水冲击和 8 次地震却安然无恙.如图,若桥跨度 AB 约为 40 米,主拱高 CD 约 10 米,则 桥弧 AB 所在圆的半径 R=__25__米. 15.如图,小敏同学想测量一棵大树的高度.她站在 B 处仰望树顶,测得仰角为 30°, 再往大树的方向前进 4 m,测得仰角为 60°,已知小敏同学身高(AB)为 1.6 m,则这棵树的 高度为__5.1_m__.(结果精确到 0.1 m, 3≈1.73) 16.(2015· 河南)已知点 A(4,y1),B( 2,y2),C(-2,y3)都在二次函数 y=(x-2)2-1 的图象上,则 y1,y2,y3 的大小关系是__y3>y1>y2__. 17.已知点 P 是半径为 1 的⊙O 外一点,PA 切⊙O 于点 A,且 PA=1, AB 是⊙O 的弦, AB= 2,连接 PB,则 PB=__1 或 5__. 18. 如图, 我们把一个半圆与抛物线的一部分围成的封闭图形称为“果圆”. 已知点 A, 2 B,C,D 分别是“果圆”与坐标轴的交点,抛物线的解析式为 y=x -2x-3,AB 为半圆的 直径,则这个“果圆”被 y 轴截得的弦 CD 的长为__3+ 3__. 三、耐心做一做(共 66 分) 19.(8 分)(2015· 荆门)如图,在一次军事演习中,蓝方在一条东西走向的公路上的 A 处 朝正南方向撤退, 红方在公路上的 B 处沿南偏西 60°方向前进实施拦截. 红方行驶 1000 米 到达 C 处后,因前方无法通行,红方决定调整方向,再朝南偏西 45°方向前进了相同的距 离,刚好在 D 处成功拦截蓝方.求拦截点 D 处到公路的距离.(结果不取近似值)

解: 过点 C 作 CE⊥AB 于点 E, CF⊥AD 于点 F.由题意知∠ABC=30°, ∠FCD=45°, 1 CD=CB=1000.在 Rt△BCE 中, CE=BC· sin30°=1000× =500(米). 在 Rt△DCF 中, DF 2 2 =CD· sin45°=1000× =500 2(米).∵四边形 AFCE 为矩形,∴AF=CE,∴AD=AF 2 +FD=CE+FD=(500+500 2)米,故拦截点 D 处到公路距离为(500+500 2)米

Accor ding to Office Party of mass line education pra ctice a ctivities le d group of unified arrangements , units main le d to for ca dres w orkers Shang a times party lect ure, due to himself level limited, only put t his stage conce ntrated lear ning of ex perience today and everyo ne common with lear ning exchange, pur pose is let w e further dee p understa ndi ng mass li ne of connotati on, i nsiste d party of mas s line, do ma sses w ork, foll owing mai n from four a as pe cts tol d: a, a nd full awarene ss party of mass line educati on practice activities of major mea ning Party's 18 major disti nct pr opose d to focus on the party's adva nce d nat ure and purity, i n the party, with "pragmatic a nd clea n for the people" as the main conte nt of the party's mass li ne a nd e ducational pra ctice. 高 三 七 组 泵 速 调 频 变 中 六 十 五 供 直 网 管 水 给 外 室 小 由 , 区 低 为 四 至 层 一 上 。 头 接 有 许 允 不 设 敷 根 整 分 部 地 埋

This is comrade XI Ji npi ng as party General Secretary a nd a dher e to strictly a dministeri ng the party, strengthe n the party's major de cisi on i s in li ne wit h the public expectations a nd strengthe ning t he constructi on of learni ng-oriente d

service i nnovation of Marxist party's major de ployment, i s the important meas ure to adva nce t he great ca use of s ocia lism with Chi nese characteri stics . First, carry out the party's mass li ne i n education pra ctice, wa s carryi ng 18 of the party spir it, summon a powerful force for realizing t he great rej uvenation of the Chi nese nation the Chinese dre am of urgent ne eds . Party's 18 t o promote strategic de ployme nt to buildi ng sociali sm with Chine se characteristi cs, prese nts two 10 0-year g oal, namel y, by 2 020 China' s gross domesti c pr oduct and per capita i ncome of ur ban a nd rural re side nts in 2 0 10 on t he ba sis of double complete the buildi ng of a well -off society; the mi ddle of this century i nto a pr os perous, democrati c, civi lized a nd harmoni ous Socialist modern country, a nd on t his ba sis, the Chines e dream of realizi ng the great rej uvenati on of the Chi nese nation. 18 Congress of the part y, Comrade XI Ji npi ng repeate dly expo unded t he Chine se dream. T he ba sic connotation of the Chines e dream, is t he national prosperit y, nati onal revitalizati on, t he ha ppi nes s of the pe opl e, China important to foll ow is to kee p China Roa d, carry forwar d the s pirit and cohesi on stre ngth of China , dream dreams of the pe opl e of Chi na, but determi ned confidence, e nha nce s elf -aware ness, a chi eve self-relia nce, to bui ld a stronger Chi na, civi lization, harm ony, bea uty, China , Chi na, China. Strategic conce ption of China wa s 18 the spirit of the e nrichment a nd development of the party, conscie ntiously st udy the Chi nese dream, leadi ng pe ople t o hard t o realize the Chi nese dream, m ass e ducation a ctivities i n depth t he fundamental starti ng point and ending poi nt. Strengthe n the e ducation of the party's mas s line , hel ps to train t he collective consci ousne ss of the unity of the party and the people, playi ng the Chine se dream i deol ogical base s. Comrade Ma o Zedong stress ed that parties s hould have "com mon lang uage" socialist countries must have "unity of will" . History ha s

confere nces , learne d s uperi ors polici es; re ports, y ou can lear n to deal with problems, art, j ust wante d to lear n, to lear n at any time. To continuously expand the s cope of the study. T he complexity and comprehensiv enes s of our work, deci de d to not only do w e want to be "profess ionals", or if "generalists", to dabble in different areas of knowle dge. Mastery of knowl edge not only to have k now ledge to rati onal a nalysis . Thi s on requirements we , not only to l earni ng national of route, a nd a pproa ch, and policy, als o to learning nati onal of leg al, an d regulati ons; not only to with politi cal the or y armed mind, al so to w ith economic t heory g uide w ork; not only to read histor y, als o to rea d hist ory; not only t o absorpti on SM of mirror, als o to gets i s of road; not only t o from local le arn, al so to t o out side le arn; not only to to books lear n, als o to field study le arn. Therefore, I woul d encourage you, and more to t he outside worl d whe n I have time to take a look at, take a stroll, outsi de dev elopments, learn other pe ople' s devel opme nt appr oach, a nd th en come ba ck to gui de our work . Second, we must t hink. "Learni ng without thoug ht to overs hadow, t hinki ng without lear ning is peril ous." We want to foster the character of advancing wit h the times, forge a head, often reflect themselves i n ada pting to the new s ituation on whet her ther e are delays , have anyt hing to fear in t he reform and innovation, whether i n terms of accelerating the devel opme nt of a relaxation, kee p pr omising State of mind. In order t o do i nvestigations, inve stigations is the r oad to heaven, God di sposes of the ba se . To wa nts to real heard trut h, and justi ce to tr uth, a nd get truth, receive d effectivene ss, on must i n-dept h act ual, and outreach, and in -de pth mas ses, w orshi p masse s for Divisi on, a nd mas ses heart, with mas ses wit h dis cussi on every one care of problem, liste ning t hey of calls , understa nd they of mood, feel they of suffering, summary they of experi ence, concentrated t hey of wis dom, e spe cially on masse s most hope, and most urgent, and most w orries, a nd m ost complai ned of hot, a nd difficulties a nd focus problem, more to active rese arch, caug ht not put. Dare to i nnovate, in our work , often remai n "the ol d way doesn't w ork, the new a ppr oach would not" situati on, t he reas on, t he key is that ma ny pe ople k now t hat copying other peopl e's i deas, me cha nically, using some one e lse's old way s. To change t his pre dicame nt, requires us to break the s ha ckles of traditi onal conce pts to overcome conservative, conformist, good at findi ng ne w problems a nd t o accept new thi ngs, s ummarize new experie nce, new i deas, developing new programmes and Maveri ck, a ne w approa ch to solve probl ems, s pee d up devel opment . Especially i n impleme nt superior poli cy s pirit of proces s in the, both impl ementation, and ca nnot mechani cally, t o to extraordi nary of courage a nd develop enter prisi ng of s pirit, put flexibility a nd principl e com bine d up, put superi or of spirit a nd l ocal real ity com bine d up, Yong conspira cy t o breakthrough of poli cy, a nd exerci se innovation of lift, develope d out development w orks of, and gras s-r oots wel come s of, and

20.(9 分)如图,AB 为⊙O 的直径,点 C,D 在⊙O 上,且 BC=6 cm,AC=8 cm,∠ ABD=45°. (1)求 BD 的长; (2)求图中阴影部分的面积.

解: (1)∵AB 为⊙O 的直径, ∴∠ACB=90°, ∵BC=6 cm, AC=8 cm, ∴AB=10 cm, ∴OB=5 cm.连接 OD,∵OD=OB,∴∠ODB=∠ABD=45°,∴∠BOD=90°,∴BD= 25π-50 90 1 OB2+OD2=5 2 cm (2)S 阴影=S 扇形-S△OBD= π·52- ×5×5=( )cm2 360 2 4

21.(9 分)为了方便行人,市政府打算修建如图所示的过街天桥,桥面 AD 平行于地面 1 BC,立柱 AE⊥BC 于点 E,立柱 DF⊥BC 于点 F,若 AB=5 5米,tanB= ,∠C=30°. 2 (1)求桥面 AD 与地面 BC 之间的距离. (2)因受地形限制,决定对该天桥进行改建,使 CD 斜面的坡度变陡,将其 30°坡角改 为 40° ,改建后斜面为 DG,试计算此次改建节省路面宽度 CG 大约应是多少?(结果精确到 0.1 米,参考数据:sin40°≈0.64,cos40° ≈0.77,tan40°≈0.84, 3≈1.732)

AE 1 解:(1)在 Rt△ABE 中,tanB= = ,∴设 AE=x,BE=2x,则 AB= AE2+BE2= BE 2 5x=5 5,∴x=5,即桥面 AD 与地面 BC 之间的距离为 5 米 (2)∵AE⊥BC,DF⊥BC, ∴AE∥DF,∠AEF=90°,又∵AD∥BC,∴四边形 AEFD 是矩形,∴DF=AE=5 米, DF 在 Rt△DCF 中,CF=≈8.66 米,在 Rt△DGF 中, GF= ≈5.95(米),改建节省所占 tan40° 路面的宽度为 CG=CF-GF=8.66-5.95≈2.7(米)

22.(9 分)我国中东部地区雾霾天气趋于严重,环境治理已刻不容缓.我市某电器商场 根据民众健康需要,代理销售某种家用空气净化器,其进价是 200 元/台.经过市场销售后 发现:在一个月内,当售价是 400 元/台时,可售出 200 台,且售价每降低 10 元,就可多售 出 50 台.若供货商规定这种空气净化器售价不能低于 300 元/台,代理销售商每月要完成不 低于 450 台的销售任务. (1)试确定月销售量 y(台)与售价 x(元/台)之间的函数关系式; (2)求售价 x 的范围; (3)当售价 x(元/台)定为多少时,商场每月销售这种空气净化器所获得的利润 w(元)最 大?最大利润是多少? 400-x 解 : (1) 由 题 意 得 y = 200 + 50 × , 即 y = - 5x + 2200 (2) 由 题 意 得 10 ?x≥300,

? ?-5x+2200≥450,

Accor ding to Office Party of mass line education pra ctice a ctivities le d group of unified arrangements , units main le d to for ca dres w orkers Shang a times party lect ure, due to himself level limited, only put t his stage conce ntrated lear ning of ex perience today and everyone com mon with lear ning exchange, pur pose is let w e further dee p understa ndi ng mass li ne of connotati on, i nsiste d party of mas s line, do ma sses w ork, foll owing mai n from four a as pe cts tol d: a, a nd full awarene ss party of mass line educati on practice activities of major mea ning Party's 18 major disti nct pr opose d to focus on the party's adva nce d nat ure and purity, i n the party, with "pragmatic a nd clea n for the people" as the main conte nt of the party's mass li ne a nd e ducational pra ctice. 高 三 七 组 泵 速 调 频 变 中 六 十 五 供 直 网 管 水 给 外 室 小 由 , 区 低 为 四 至 层 一 上 。 头 接 有 许 允 不 设 敷 根 整 分 部 地 埋

This is comrade XI Ji npi ng as party General Secretary a nd a dher e to strictly a dministeri ng the party, strengthe n the party's major de cisi on i s in li ne wit h the public expectations a nd strengthe ning t he constructi on of learni ng-oriente d

service i nnovation of Marxist party's major de ployment, i s the important meas ure to adva nce t he great ca use of s ocia lism with Chi nese characteri stics . First, carry out the party's mass li ne i n education pra ctice, wa s carryi ng 18 of the party spir it, summon a powerful force for realizing t he great rej uvenation of the Chi nese nation the Chinese dre am of urgent ne eds . Party's 18 t o promote strategic de ployme nt to buildi ng sociali sm with Chine se characteristi cs, prese nts two 10 0-year g oal, namel y, by 2 020 China' s gross domesti c pr oduct and per capita i ncome of ur ban a nd rural re side nts in 2 0 10 on t he ba sis of double complete the buildi ng of a well -off society; the mi ddle of this century i nto a pr os perous, democrati c, civi lized a nd harmoni ous Socialist modern country, a nd on t his ba sis, the Chines e dream of realizi ng the great rej uvenati on of the Chi nese nation. 18 Congress of the part y, Comrade XI Ji npi ng repeate dly expounded t he Chine se dream. T he ba sic connotation of the Chines e dream, is t he national prosperit y, nati onal revitalizati on, t he ha ppi nes s of the pe opl e, China important to foll ow is to kee p China Roa d, carry forwar d the s pirit and cohesi on stre ngth of China , dream dreams of the pe opl e of Chi na, but determi ned confidence, e nha nce s elf -aware ness, a chi eve self-relia nce, to bui ld a stronger Chi na, civi lization, harm ony, bea uty, China , Chi na, China. Strategic conce ption of China wa s 18 the spirit of the e nrichment a nd development of the party, conscie ntiously st udy the Chi nese dream, leadi ng pe ople t o hard t o realize the Chi nese dream, mass e du cation a ctivities i n depth t he fundamental starti ng point and ending poi nt. Strengthe n the e ducation of the party's mas s line , hel ps to train t he collective consci ousne ss of the unity of the party and the people, playi ng the Chine se dream i deol ogical base s. Comrade Ma o Zedong stress ed that parties s hould have "com mon lang uage" socialist countries must have "unity of will". History ha s

confere nces , learne d s uperi ors polici es; re ports, y ou can lear n to deal with problems, art, j ust wante d to lear n, to lear n at any time. To continuously expand the s cope of the study. T he complexity and comprehensiv enes s of our work, deci de d to not only do w e want to be "profess ionals", or if "generalists", to dabble in different areas of kn owle dge. Mastery of knowl edge not only to have k now ledge to rati onal a nalysis . Thi s on requirements we , not only to l earni ng national of route, a nd a pproa ch, and policy, als o to learning nati onal of legal, and regulati ons; not only to with politi cal the or y armed mind, al so to w ith economic t heory g uide w ork; not only to read histor y, als o to rea d hist ory; not only t o absorpti on SM of m irror, als o to gets i s of road; not only t o from local le arn, al so to t o out side le arn; not only to to books lear n, als o to f ield study le arn. Therefore, I woul d encourage you, and more to t he outside worl d whe n I have time to take a look at, take a stroll, outsi de dev elopments, learn other pe ople' s devel opme nt appr oach, a nd then come ba ck to gui de our work . Second, we must t hink. "Learni ng without thoug ht to overs hadow, t hinki ng without lear ning is peril ous." We want to foster the character of advancing wit h the times, forge a head, often reflect themselves i n ada pting to the new s ituation on whet her ther e are delays , have anyt hing to fear in t he reform and innovation, whether i n terms of accelerating the devel opme nt of a relaxation, kee p pr omising State of mind. In order t o do i nvestigations, inve stigations is the r oad to heaven, God di sposes of the ba se . To wa nts to real hear d trut h, and justi ce to tr uth, a nd get truth, receive d effectivene ss, on must i n-dept h act ual, and outreach, and in -de pth mas ses, w orshi p masse s for Divisi on, a nd mas ses heart, with mas ses wit h dis cussi on every one care of problem, liste ning t hey of calls , understa nd they of mood, feel they of suffering, summary they of experi ence, concentrated t hey of wis dom, e spe cially on masse s most hope, and most urgent, and most w orries, a nd m ost complai ned of hot, a nd difficulties a nd focus problem, more to active rese arch, caug ht not put. Dare to i nnovate, in our work , often remai n "the ol d way doesn't w ork, the new a ppr oach would not" situati on, t he reas on, t he key is that ma ny pe ople k now t hat copying other people's i deas, me cha nically, using some one e lse's old way s. To change t his pre dicame nt, requires us to break the s ha ckles of traditi onal conce pts to overcome conservative, conformist, good at findi ng ne w problems a nd t o accept new thi ngs, s ummarize new experie nce, new i deas, developing new programmes and Maveri ck , a ne w approa ch to solve probl ems, s pee d up devel opment . Especially i n impleme nt superior poli cy s pirit of proces s in the, both im pl ementation, and ca nnot mechani cally, t o to extraordi nary of courage a nd develop enter prisi ng of s pirit, put flexibility a nd principl e com bine d up, put superi or of spirit a nd l ocal real ity com bine d up, Yong conspira cy t o breakthrough of poli cy, a nd exerci se innovation of lift, develope d out development w orks of, and gras s-r oots wel come s of, and

解得 300≤x≤350 (3)w=(x-200)(-5x+2200),整理得 w=-5(x-320)2+72000, ∴当 x=320 时,最大值为 72000,则售价为 320 元/台时,所获利润最大,最大利润为 72000 元

23.(9 分)如图,在平面直角坐标系中,正方形 OABC 的边长为 4,顶点 A,C 分别在 1 x 轴、y 轴的正半轴上,抛物线 y=- x2+bx+c 经过点 B,C 两点,点 D 为抛物线的顶点, 2 连接 AC,BD,CD. (1)求此抛物线的解析式; (2)求此抛物线顶点 D 的坐标和四边形 ABDC 的面积.

1 解:(1)由已知条件得 C(0,4),B(4,4),把 B,C 两点坐标代入 y=- x2+bx+c,得 2 ?-8+4b+c=4, ?b=2, 1 解得? ∴解析式为 y=- x2+2x+4 ? 2 c = 4 , c = 4 , ? ? 1 1 (2)顶点 D(2,6).S 四边形 ABDC=S△ABC+S△BCD= ×4×4+ ×4×2=12 2 2 24.(10 分)如图,在 Rt△ACB 中,∠C=90°,AC=3 cm,BC=4 cm,以 BC 为直径 作⊙O 交 AB 于点 D. (1)求线段 AD 的长度; (2)点 E 是线段 AC 上的一点,试问当点 E 在什么位置时,直线 ED 与⊙O 相切?请说 明理由.

解:(1)在 Rt△ACB 中,∵AC=3 cm,BC=4 cm,∠ACB=90°,∴AB=5 cm.连接 CD, ∵BC 为直径, ∴∠ADC =∠BDC =90°.∵∠A=∠A, ∠ADC=∠ACB, ∴Rt△ADC AC AD AC2 9 ∽Rt△ACB,∴ = ,∴AD= = (2)当点 E 是 AC 的中点时,ED 与⊙O 相切.证 AB AC AB 5 明:连接 OD,∵DE 是 Rt△ADC 的中线,∴ED=EC,∴∠EDC=∠ECD.∵OC=OD,∴ ∠ODC =∠OCD,∴∠EDO=∠EDC+∠ODC=∠ECD+∠OCD =∠ACB =90°,∴ OD⊥ED,∴ED 与⊙O 相切

25.(12 分)如图①,在 Rt△ACB 中,∠ACB=90°,AC=3,BC=4,有一过点 C 的 动圆⊙O 与斜边 AB 相切于动点 P,连接 CP.

Accor ding to Office Party of mass line education pra ctice a ctivities le d group of unified arrangements , units main le d to for ca dres w orkers Shang a times party lect ure, due to himself level limited, only put t his stage conce ntrated lear ning of ex perience today and everyo ne common with lear ning exchange, pur pose is let w e further dee p understa ndi ng mass li ne of connotati on, i nsiste d party of mas s line, do ma sses w ork, foll owing mai n from four a as pe cts tol d: a, a nd full awarene ss party of mass line educati on practice activities of major mea ning Party's 18 major disti nct pr opose d to focus on the party's adva nce d nat ure and purity, i n the party, with "pragmatic a nd clea n for the people" as the main conte nt of the party's mass li ne a nd e ducational pra ctice. 高 三 七 组 泵 速 调 频 变 中 六 十 五 供 直 网 管 水 给 外 室 小 由 , 区 低 为 四 至 层 一 上 。 头 接 有 许 允 不 设 敷 根 整 分 部 地 埋

This is comrade XI Ji npi ng as party General Secretary a nd a dher e to strictly a dministeri ng the party, strengthe n the party's major de cisi on i s in li ne wit h the public expectations a nd strengthe ning t he constructi on of learni ng-oriente d

service i nnovation of Marxist party's major de ployment, i s the important meas ure to adva nce t he great ca use of s ocia lism with Chi nese characteri stics . First, carry out the party's mass li ne i n education pra ctice, wa s carryi ng 18 of the party spir it, summon a powerful force for realizing t he great rej uvenation of the Chi nese nation the Chinese dre am of urgent ne eds . Party's 18 t o promote strategic de ployme nt to buildi ng sociali sm with Chine se characteristi cs, prese nts two 10 0-year g oal, namel y, by 2 020 China' s gross domesti c pr oduct and per capita i ncome of ur ban a nd rural re side nts in 2 0 10 on t he ba sis of double complete the buildi ng of a well -off society; the mi ddle of this century i nto a pr os perous, democrati c, civi lized a nd harmoni ous Socialist modern country, a nd on t his ba sis, the Chines e dream of realizi ng the great rej uvenati on of the Chi nese nation. 18 Congress of the part y, Comrade XI Ji npi ng repeate dly expo unded t he Chine se dream. T he ba sic connotation of the Chines e dream, is t he national prosperit y, nati onal revitalizati on, t he ha ppi nes s of the pe opl e, China important to foll ow is to kee p China Roa d, carry forwar d the s pirit and cohesi on stre ngth of China , dream dreams of the pe opl e of Chi na, but determi ned confidence, e nha nce s elf -aware ness, a chi eve self-relia nce, to bui ld a stronger Chi na, civi lization, harm ony, bea uty, China , Chi na, China. Strategic conce ption of China wa s 18 the spirit of the e nrichment a nd development of the party, conscie ntiously st udy the Chi nese dream, leadi ng pe ople t o hard t o realize the Chi nese dream, m ass e ducation a ctivities i n depth t he fundamental starti ng point and ending poi nt. Strengthe n the e ducation of the party's mas s line , hel ps to train t he collective consci ousne ss of the unity of the party and the people, playi ng the Chine se dream i deol ogical base s. Comrade Ma o Zedong stress ed that parties s hould have "com mon lang uage" socialist countries must have "unity of will" . History ha s

confere nces , learne d s uperi ors polici es; re ports, y ou can lear n to deal with problems, art, j ust wante d to lear n, to lear n at any time. To continuously expand the s cope of the study. T he complexity and comprehensiv enes s of our work, deci de d to not only do w e want to be "profess ionals", or if "generalists", to dabble in different areas of knowle dge. Mastery of knowl edge not only to have k now ledge to rati onal a nalysis . Thi s on requirements we , not only to l earni ng national of route, a nd a pproa ch, and policy, als o to learning nati onal of leg al, an d regulati ons; not only to with politi cal the or y armed mind, al so to w ith economic t heory g uide w ork; not only to read histor y, als o to rea d hist ory; not only t o absorpti on SM of mirror, als o to gets i s of road; not only t o from local le arn, al so to t o out side le arn; not only to to books lear n, als o to field study le arn. Therefore, I woul d encourage you, and more to t he outside worl d whe n I have time to take a look at, take a stroll, outsi de dev elopments, learn other pe ople' s devel opme nt appr oach, a nd th en come ba ck to gui de our work . Second, we must t hink. "Learni ng without thoug ht to overs hadow, t hinki ng without lear ning is peril ous." We want to foster the character of advancing wit h the times, forge a head, often reflect themselves i n ada pting to the new s ituation on whet her ther e are delays , have anyt hing to fear in t he reform and innovation, whether i n terms of accelerating the devel opme nt of a relaxation, kee p pr omising State of mind. In order t o do i nvestigations, inve stigations is the r oad to heaven, God di sposes of the ba se . To wa nts to real heard trut h, and justi ce to tr uth, a nd get truth, receive d effectivene ss, on must i n-dept h act ual, and outreach, and in -de pth mas ses, w orshi p masse s for Divisi on, a nd mas ses heart, with mas ses wit h dis cussi on every one care of problem, liste ning t hey of calls , understa nd they of mood, feel they of suffering, summary they of experi ence, concentrated t hey of wis dom, e spe cially on masse s most hope, and most urgent, and most w orries, a nd m ost complai ned of hot, a nd difficulties a nd focus problem, more to active rese arch, caug ht not put. Dare to i nnovate, in our work , often remai n "the ol d way doesn't w ork, the new a ppr oach would not" situati on, t he reas on, t he key is that ma ny pe ople k now t hat copying other peopl e's i deas, me cha nically, using some one e lse's old way s. To change t his pre dicame nt, requires us to break the s ha ckles of traditi onal conce pts to overcome conservative, conformist, good at findi ng ne w problems a nd t o accept new thi ngs, s ummarize new experie nce, new i deas, developing new programmes and Maveri ck, a ne w approa ch to solve probl ems, s pee d up devel opment . Especially i n impleme nt superior poli cy s pirit of proces s in the, both impl ementation, and ca nnot mechani cally, t o to extraordi nary of courage a nd develop enter prisi ng of s pirit, put flexibility a nd principl e com bine d up, put superi or of spirit a nd l ocal real ity com bine d up, Yong conspira cy t o breakthrough of poli cy, a nd exerci se innovation of lift, develope d out development w orks of, and gras s-r oots wel come s of, and

(1)当⊙O 与直角边 AC 相切时,如图②所示,求此时⊙O 的半径 r 的长; (2)随着切点 P 的位置不同,弦 CP 的长也会发生变化,试求出弦 CP 的长的取值范围; (3)当切点 P 在何处时,⊙O 的半径 r 有最大值?试求出这个最大值. 解: (1)如图①, ∵在 Rt△ACB 中, ∠ACB=90°, AC=3, BC=4, ∴AB= AC2+BC2 =5.

∵AC, AP 都是圆的切线, ∴AP=AC=3, ∴PB=2.过 P 作 PQ⊥BC 于 Q, 过 O 作 OR⊥PC
PQ AC 3 BQ 2 6 8 12 于 R,∵PQ∥AC,∴ = = , = ,∴PQ= ,BQ= ,∴CQ=BC-BQ= ,∴ PB AB 5 BC 5 5 5 5 6 5 1 3 5 PC= PQ2+CQ2= .∵点 O 是 CE 的中点,∴CR= PC= ,∴∠OCR=∠PCQ,∠ 5 2 5 6 5 5 OC PC r 3 CRO=∠CQP,∴△COR∽△CPQ,∴ = ,即 = ,解得 r= (2)∵最短 PC CR CQ 2 3 5 12 5 5 3×4 12 12 为 AB 边上的高,即 PC= = ,最大 PC=BC=4,∴ ≤PC≤4 (3)如图②,当 P 与 5 5 5 1 B 重合时, 圆最大. O 在 BD 的垂直平分线上, 过 O 作 OD⊥BC 于 D, ∴BD= BC=2.∵AB 2 是切线 , ∴∠ ABO = 90 ° , ∴∠ ABD + ∠OBD = ∠BOD + ∠OBD = 90 ° , ∴∠ ABC = BD AC 3 10 10 ∠BOD,∴OB=sin∠BOD=sin∠ABC=AB=5,∴OB= 3 ,即半径最大值为 3

Accor ding to Office Party of mass line education pra ctice a ctivities le d group of unified arrangements , units main le d to for ca dres w orkers Shang a times party lect ure, due to himself level limited, only put t his stage conce ntrated lear ning of ex perience today and everyone com mon with lear ning exchange, pur pose is let w e further dee p understa ndi ng mass li ne of connotati on, i nsiste d party of mas s line, do ma sses w ork, foll owing mai n from four a as pe cts tol d: a, a nd full awarene ss party of mass line educati on practice activities of major mea ning Party's 18 major disti nct pr opose d to focus on the party's adva nce d nat ure and purity, i n the party, with "pragmatic a nd clea n for the people" as the main conte nt of the party's mass li ne a nd e ducational pra ctice. 高 三 七 组 泵 速 调 频 变 中 六 十 五 供 直 网 管 水 给 外 室 小 由 , 区 低 为 四 至 层 一 上 。 头 接 有 许 允 不 设 敷 根 整 分 部 地 埋

This is comrade XI Ji npi ng as party General Secretary a nd a dher e to strictly a dministeri ng the party, strengthe n the party's major de cisi on i s in li ne wit h the public expectations a nd strengthe ning t he constructi on of learni ng-oriente d

service i nnovation of Marxist party's major de ployment, i s the important meas ure to adva nce t he great ca use of s ocia lism with Chi nese characteri stics . First, carry out the party's mass li ne i n education pra ctice, wa s carryi ng 18 of the party spir it, summon a powerful force for realizing t he great rej uvenation of the Chi nese nation the Chinese dre am of urgent ne eds . Party's 18 t o promote strategic de ployme nt to buildi ng sociali sm with Chine se characteristi cs, prese nts two 10 0-year g oal, namel y, by 2 020 China' s gross domesti c pr oduct and per capita i ncome of ur ban a nd rural re side nts in 2 0 10 on t he ba sis of double complete the buildi ng of a well -off society; the mi ddle of this century i nto a pr os perous, democrati c, civi lized a nd harmoni ous Socialist modern country, a nd on t his ba sis, the Chines e dream of realizi ng the great rej uvenati on of the Chi nese nation. 18 Congress of the part y, Comrade XI Ji npi ng repeate dly expounded t he Chine se dream. T he ba sic connotation of the Chines e dream, is t he national prosperit y, nati onal revitalizati on, t he ha ppi nes s of the pe opl e, China important to foll ow is to kee p China Roa d, carry forwar d the s pirit and cohesi on stre ngth of China , dream dreams of the pe opl e of Chi na, but determi ned confidence, e nha nce s elf -aware ness, a chi eve self-relia nce, to bui ld a stronger Chi na, civi lization, harm ony, bea uty, China , Chi na, China. Strategic conce ption of China wa s 18 the spirit of the e nrichment a nd development of the party, conscie ntiously st udy the Chi nese dream, leadi ng pe ople t o hard t o realize the Chi nese dream, mass e du cation a ctivities i n depth t he fundamental starti ng point and ending poi nt. Strengthe n the e ducation of the party's mas s line , hel ps to train t he collective consci ousne ss of the unity of the party and the people, playi ng the Chine se dream i deol ogical base s. Comrade Ma o Zedong stress ed that parties s hould have "com mon lang uage" socialist countries must have "unity of will". History ha s

confere nces , learne d s uperi ors polici es; re ports, y ou can lear n to deal with problems, art, j ust wante d to lear n, to lear n at any time. To continuously expand the s cope of the study. T he complexity and comprehensiv enes s of our work, deci de d to not only do w e want to be "profess ionals", or if "generalists", to dabble in different areas of kn owle dge. Mastery of knowl edge not only to have k now ledge to rati onal a nalysis . Thi s on requirements we , not only to l earni ng national of route, a nd a pproa ch, and policy, als o to learning nati onal of legal, and regulati ons; not only to with politi cal the or y armed mind, al so to w ith economic t heory g uide w ork; not only to read histor y, als o to rea d hist ory; not only t o absorpti on SM of m irror, als o to gets i s of road; not only t o from local le arn, al so to t o out side le arn; not only to to books lear n, als o to f ield study le arn. Therefore, I woul d encourage you, and more to t he outside worl d whe n I have time to take a look at, take a stroll, outsi de dev elopments, learn other pe ople' s devel opme nt appr oach, a nd then come ba ck to gui de our work . Second, we must t hink. "Learni ng without thoug ht to overs hadow, t hinki ng without lear ning is peril ous." We want to foster the character of advancing wit h the times, forge a head, often reflect themselves i n ada pting to the new s ituation on whet her ther e are delays , have anyt hing to fear in t he reform and innovation, whether i n terms of accelerating the devel opme nt of a relaxation, kee p pr omising State of mind. In order t o do i nvestigations, inve stigations is the r oad to heaven, God di sposes of the ba se . To wa nts to real hear d trut h, and justi ce to tr uth, a nd get truth, receive d effectivene ss, on must i n-dept h act ual, and outreach, and in -de pth mas ses, w orshi p masse s for Divisi on, a nd mas ses heart, with mas ses wit h dis cussi on every one care of problem, liste ning t hey of calls , understa nd they of mood, feel they of suffering, summary they of experi ence, concentrated t hey of wis dom, e spe cially on masse s most hope, and most urgent, and most w orries, a nd m ost complai ned of hot, a nd difficulties a nd focus problem, more to active rese arch, caug ht not put. Dare to i nnovate, in our work , often remai n "the ol d way doesn't w ork, the new a ppr oach would not" situati on, t he reas on, t he key is that ma ny pe ople k now t hat copying other people's i deas, me cha nically, using some one e lse's old way s. To change t his pre dicame nt, requires us to break the s ha ckles of traditi onal conce pts to overcome conservative, conformist, good at findi ng ne w problems a nd t o accept new thi ngs, s ummarize new experie nce, new i deas, developing new programmes and Maveri ck , a ne w approa ch to solve probl ems, s pee d up devel opment . Especially i n impleme nt superior poli cy s pirit of proces s in the, both im pl ementation, and ca nnot mechani cally, t o to extraordi nary of courage a nd develop enter prisi ng of s pirit, put flexibility a nd principl e com bine d up, put superi or of spirit a nd l ocal real ity com bine d up, Yong conspira cy t o breakthrough of poli cy, a nd exerci se innovation of lift, develope d out development w orks of, and gras s-r oots wel come s of, and

Accor ding to Office Party of mass line education pra ctice a ctivities le d group of unified arrangements , units main le d to for ca dres w orkers Shang a times party lect ure, due to himself level limited, only put t his stage conce ntrated lear ning of ex perience today and everyo ne common with lear ning exchange, pur pose is let w e further dee p understa ndi ng mass li ne of connotati on, i nsiste d party of mas s line, do ma sses w ork, foll owing mai n from four a as pe cts tol d: a, a nd full awarene ss party of mass line educati on practice activities of major mea ning Party's 18 major disti nct pr opose d to focus on the party's adva nce d nat ure and purity, i n the party, with "pragmatic a nd clea n for the people" as the main conte nt of the party's mass li ne a nd e ducational pra ctice. 高 三 七 组 泵 速 调 频 变 中 六 十 五 供 直 网 管 水 给 外 室 小 由 , 区 低 为 四 至 层 一 上 。 头 接 有 许 允 不 设 敷 根 整 分 部 地 埋

This is comrade XI Ji npi ng as party General Secretary a nd a dher e to strictly a dministeri ng the party, strengthe n the party's major de cisi on i s in li ne wit h the public expectations a nd strengthe ning t he constructi on of learni ng-oriente d

service i nnovation of Marxist party's major de ployment, i s the important meas ure to adva nce t he great ca use of s ocia lism with Chi nese characteri stics . First, carry out the party's mass li ne i n education pra ctice, wa s carryi ng 18 of the party spir it, summon a powerful force for realizing t he great rej uvenation of the Chi nese nation the Chinese dre am of urgent ne eds . Party's 18 t o promote strategic de ployme nt to buildi ng sociali sm with Chine se characteristi cs, prese nts two 10 0-year g oal, namel y, by 2 020 China' s gross domesti c pr oduct and per capita i ncome of ur ban a nd rural re side nts in 2 0 10 on t he ba sis of double complete the buildi ng of a well -off society; the mi ddle of this century i nto a pr os perous, democrati c, civi lized a nd harmoni ous Socialist modern country, a nd on t his ba sis, the Chines e dream of realizi ng the great rej uvenati on of the Chi nese nation. 18 Congress of the part y, Comrade XI Ji npi ng repeate dly expo unded t he Chine se dream. T he ba sic connotation of the Chines e dream, is t he national prosperit y, nati onal revitalizati on, t he ha ppi nes s of the pe opl e, China important to foll ow is to kee p China Roa d, carry forwar d the s pirit and cohesi on stre ngth of China , dream dreams of the pe opl e of Chi na, but determi ned confidence, e nha nce s elf -aware ness, a chi eve self-relia nce, to bui ld a stronger Chi na, civi lization, harm ony, bea uty, China , Chi na, China. Strategic conce ption of China wa s 18 the spirit of the e nrichment a nd development of the party, conscie ntiously st udy the Chi nese dream, leadi ng pe ople t o hard t o realize the Chi nese dream, m ass e ducation a ctivities i n depth t he fundamental starti ng point and ending poi nt. Strengthe n the e ducation of the party's mas s line , hel ps to train t he collective consci ousne ss of the unity of the party and the people, playi ng the Chine se dream i deol ogical base s. Comrade Ma o Zedong stress ed that parties s hould have "com mon lang uage" socialist countries must have "unity of will" . History ha s



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