第一篇:人教版八年级上册英语(新目标)配套练习册答案
山东省
人教版八年级上册英语(新目标)配套练习册答案
Unit 1 How often do you exercise?
Section A I.1.program 2.results 3.Exercise 4.twice 5.Internet II.DBDDC ABC III.1.helps 2.skateboarding 3.once 4.active 5.shopping IV.1.surfs the Internet 2.goes to the movies 3.never arrives late 4.fours times a month 5.How often V.1.How often does go 2.What does do 3.Does go doesn’t 4.What do do 5.What is VI.CDAB
Section B I.1.different 2.health 3.habit 4.try 5.keep 6.Although 7.for 8.better II.DDCBA ADACD III.goes 2.eating 3.to esercise 4.get 5.to drink IV.1.healthy lifestyle 2.Of course,twice a week 3.How many 4.is good for 5.As for most V.DBDAC ACCAB VI.CBDCD BABCA VII.(略)Unit 2 What’s the matter ?
Section A I.1.matter 2.foot 3.toothache 3.mouth 5.headache 6.fever 7.rest 8.teeth II.DADCA ABA III.1.stomachache 2.ill 3.feet 4.better 5.backache IV.1.What’s matter with 2.should lie down rest 3.have a fever 4.with honer 5.not feiiing well 6.see a dentist
V.What’s the matter with 2.shouldn’t eat anything 3.Does have 4.When did it start 5.How is she felling VI.EGADC
Section B I.1.thirsty 2.stressed 3.early 4.problem 5.Traditional 6.weak 7.angry 8.westrn II.DCBBB AADCB III.1.to have ,to eat 2.exercise 3.enjoying 4.to hear 5.stressed IV.1.go to bed ,to stay healthy 2.too much 3.stressed out,angry 4.western countries 5.shouldn’t study V.BBADC AACDA VI.DCDCA VII.(略)学园救援团 可爱旋律 濑户之花嫁
第二篇:人教版八年级上册英语(新目标)配套练习册答案[小编推荐]
山东省
人教版八年级上册英语(新目标)配套练习册答案
Unit 1 How often do you exercise?
Section A I.1.program 2.results 3.Exercise 4.twice 5.Internet II.DBDDC ABC III.1.helps 2.skateboarding 3.once 4.active 5.shopping IV.1.surfs the Internet 2.goes to the movies 3.never arrives late 4.fours times a month 5.How often V.1.How often does go 2.What does do 3.Does go doesn’t 4.What do do 5.What is VI.CDAB
Section B I.1.different 2.health 3.habit 4.try 5.keep 6.Although 7.for 8.better II.DDCBA ADACD III.goes 2.eating 3.to esercise 4.get 5.to drink IV.1.healthy lifestyle 2.Of course,twice a week 3.How many 4.is good for 5.As for most V.DBDAC ACCAB VI.CBDCD BABCA VII.(略)Unit 2 What’s the matter ?
Section A I.1.matter 2.foot 3.toothache 3.mouth 5.headache 6.fever 7.rest 8.teeth II.DADCA ABA III.1.stomachache 2.ill 3.feet 4.better 5.backache IV.1.What’s matter with 2.should lie down rest 3.have a fever 4.with honer 5.not feiiing well 6.see a dentist
V.What’s the matter with 2.shouldn’t eat anything 3.Does have 4.When did it start 5.How is she felling VI.EGADC
Section B I.1.thirsty 2.stressed 3.early 4.problem 5.Traditional 6.weak 7.angry 8.westrn II.DCBBB AADCB III.1.to have ,to eat 2.exercise 3.enjoying 4.to hear 5.stressed IV.1.go to bed ,to stay healthy 2.too much 3.stressed out,angry 4.western countries 5.shouldn’t study V.BBADC AACDA VI.DCDCA VII.(略)
第三篇:八年级上册配套练习册答案
数学练习册八年级上册参考答案 1.1 1.略.2.DE,∠EDB,∠E.3.略.4.B5.C 6.AB=AC,BE=CD,AE=AD,∠BAE=∠CAD 7.AB∥EF,BC∥ED.8.(1)2a+2b;(2)2a+3b;(3)当n为偶数时,n2(a+b);当n为奇数时,n-12a+n+12b.1.2第1课时
1.D2.C3.(1)AD=AE;(2)∠ADB=∠AEC.4.∠1=∠25.△ABC≌△FDE(SAS)6.AB∥CD.因为△ABO≌△CDO(SAS).∠A=∠C.7.BE=CD.因为△ABE≌△ACD(SAS).第2课时
1.B2.D3.(1)∠ADE=∠ACB;(2)∠E=∠B.4.△ABD≌△BAC(AAS)5.(1)相等,因为△ABE≌△CBD(ASA);(2)DF=EF,因为△ADF≌△CEF(ASA).6.相等,因为△ABC≌△ADC(AAS).7.(1)△ADC≌△AEB;(2)AC=AB,DC=EB,BD=EC;∠ABE=∠ACD,∠BDO=∠CEO,∠BOD=∠COE.第3课时
1.B2.C3.110°4.BC的中点.因为△ABD≌△ACD(SSS).5.正确.因为△DEH≌△DFH(SSS).6.全等.因为△ABD≌△ACD(SSS).∠BAF=∠CAF.7.相等,因为△ABO≌△ACO(SSS).1.3第1课时
1~6(略).7.作∠AOB=∠α,延长BO,在BO上取一点C,则∠AOC即为所求.8.作∠AOB=∠α,以OB为边,在∠AOB的外部作∠BOC=∠β;再以OA为边,在∠AOC的内部作∠AOD=∠γ,则∠DOC即为所求.第2课时
1.略.2.(1)略;(2)全等(SAS).3.作BC=a-b;分别以点B、C为圆心,a为半径画弧,两弧交于点A;连接AB,AC,△ABC即为所求.4.分四种情况:(1)顶角为∠α,腰长为a;(2)底角为∠α,底边为a;(3)顶角为∠α,底边为a;(4)底角为∠α,腰长为a.((3),(4)暂不作).第3课时
1.四种:SSS,SAS,ASA,AAS.2.作线段AB;作∠BAD=∠α,在∠BAD同侧作∠ABE=∠B;AD与BE相交于点C.△ABC即为所求.3.作∠γ=∠α+∠β;作∠γ的外角∠γ′;作△ABC,使AB=c.∠A=∠γ′,∠B=∠α.4.作∠γ=180°-∠β;作△ABC,使BC=a,∠B=∠α,∠C=∠γ.第一章综合练习
1.A2.C3.C4.AB=DC或∠ACB=∠DBC或∠A=∠D.5.△ACD≌△BDC,△ABC≌△BAC.6.△ABC≌△CDE(AAS)7.4分钟8.△BOC′≌△B′OC(AAS)9.略10.相等.△BCF≌△EDF(SAS).△ABF≌△AEF(SSS)检测站
1.B2.B3.20°4.∠BCD5.相等.△ABP≌△ACP(SSS),△PDB≌△PEC(AAS).6.略 2.1 1~3.略.4.B5.C6.(1)(2)(4)7.20°;30°.8.略
2.2第1课时
1~2.略3.C4.D5.略6.66°7.(1)AA′∥CC′∥BB′,且AA′⊥MN,BB′⊥MN,CC′⊥MN.(2)5 cm8.(1)DE⊥AF;(2)略.第2课时 1.(-2,-3),(2,3).2.3,-43.(3,2)4.B 5~6.略7.(1)(-a,b);(2)当n=4k+1时,在第一象限,n=4k+2时,在第四象限,n=4k+3时,在第三象限,n=4(n+1)时,在第二象限,k为非负整数.2.3 1~3.略.4.B5.C.6.略.7.4条.8.略.2.4第1课时
1.略.2.CM=DM,CE=DE.3.C4.∠A=∠B,∠ACD=∠BCD,∠ADC=∠BDC.5~6.略.7.连接BM,PB<PM+MB,∵MB=MA,∴PB<PA.第2课时
1.作一条线段的垂直平分线2.D3~5.略.6.分别作点A关于OM,ON的对称点D,E.连接DE,分别交OM,ON于点B,C.连接AB,AC,则△ABC的周长最小.2.5 1.略.2.103.D4.C5.作∠AOB的平分线交MN于点P.则P即为所示.6.(1)DE=DC,AE=BE,BE=BC;(2)7.7.(1)△ADO≌△AEO(AAS),△BOD≌△COE(ASA),OB=OC;(2)∠1=∠2.8.4处.三条直线围成的三角形的三内角平分线的交点,及任一内角平分线与其他两个角的外角平分线的交点.2.6第1课时
1.略.2.35°,35°.3.50°,80°或65°,65°.4.C5.B 6.∠EBC=36°,∠C=∠BEC=72°.7.△ACD≌ABD(SSS),∠CAG=∠BAG.AG是等腰三角ABC的顶角平分线.∴AD垂直平分BC.8.99° 第2课时
1.略.2.△ABE,△ECD,△EBC.3.C4.△DBE是等腰三角形.因为∠B=∠C=∠DEB.5.△AED是等腰三角,因为∠EAD=∠BAD=∠ADE.6~7.略.第3课时
1.略.2.1,3.3.C4.△ADE是等边三角形.因为三个角都等于60°.5.略.6.任两边的垂直平分线的交点即为点O.7.BE=DC.因为△ADC≌△ABE(SAS).第二章综合练习1.GH,∠E,EO.1.B(4,-3);C(-4,3);6;8.3.24.45.64°;58°.6.D7.C8.A9.A10.(1)AB=AD,AE=AC,BC=DE,BF=DF,EF=CF;∠BAC=∠DAE,∠B=∠D,∠C=∠E,∠BAE=∠DAC,∠EAF=∠CAF,∠BFE=∠DFC,∠BAF=∠DAF.(2)△AEF与△ACF,△ABF与△ADF都关于直线MN成轴对称.11.△ABC与△A′B′C′关于y轴对称.12.△ACE≌△DCB(SAS).AE=BD.又∠HGE=∠CGB.∠HEG=∠CBG.∠HGE+∠HEG=∠CGB+∠CBG=90°.∠EHG=90°.AE⊥BD.13.4个.①以BC为底边的等腰三角形可作1个;②以BC为腰的等腰三角形可作3个.检测站
1.60°2.AP;PC,AP;∠CAP.3.1;7.4.55°,55°或70°,40°.5.AC,∠C,△ABD.6.B7.B8.B9.D 10.A11.略.12.∠BAC=60°,∠C=90°,∠B=30°.13.∵△ABC≌△BAD.∠CAB=∠DBA,∴△EBA是等腰三角形.14.(1)5;(2)80°.15.∠ACD=180°-A2,∠BCE=180°-B2,∠ACB=90°.∴∠ACD+∠BCE=90°+∠DCE.∠DCE=45°.3.1第1课时
1.B≠0;B=0;A=0且B≠0.2.≠23.1,0.4.B5.D6.B7.x=-1且y≠08.19.ba-5;400.10.a=-1.11.略.12.n+13n-2 第2课时 1.略2.(1)2abc2;(2)xy(x+y);(3)a(a+b);(4)2x(x+y).3.A4.C5.B6.x≠1且x≠07.当a≠0时,a2a=12;当m≠0,n≠0时,n2mn=nm.8.M=-3x(a+x)2;x≠0,-a,a.9.5a2-1030a2-2a 3.2 1.略.2.2a(b-a)3.C4.C5.B6.(1)3y2x;(2)-1(x-y)2;(3)a+22-a;(4)2a2a-3b.7.-7 8.a-b+ca+b+c9.略.3.3 1~3.略.4.(1)-1ab;(2)ab18c;(3)4yx;(4)4yx.5.D6.C7.(1)a+1;(2)-b3x;(3)xy2;(4)aa+b8.-139.略.3.4 1.略.2.6a2b2,ab,3b,2a.3.(x+2)(x-2)24.D5.D6.2b24a2b2c2,3ac324a2b2c2;(2)5(a-b)215a(a+b)(a-b),3(a+b)215(a+b)(a-b);(3)3x-2y(3x+2y)(3x-2y),2(3x+2y)(3x-2y);(4)(x+1)2(x-1)(x+1)2,x(x-1)(x+1)(x-1)(x+1)2,x-1(x-1)(x+1)2.7.(m-n)2m-n,-mnm-n.8.cyz(b-c)(c-a)xyz(a-b)(b-c)(c-a),axz(a-b)(c-a)xyz(a-b)(b-c)(c-a),bxy(a-b)(b-c)xyz(a-b)(b-c)(c-a).9.(1)把前一个分式的分子,分母同乘-a2b即得下一个分式;(2)-a12b8a13b6.(3)(-1)na2n-2bn+1(-1)n+1a2n-1bn-1.3.5第1课时
1.略.2.(1)-b2a;(3)2aa-b.3.C4.D5.(1)y2x;(2)x+2;(3)3.6.(1)2+x;(2)3abb-a.7.x+2.8.原式=1.第2课时
1.略.2.b2-4c4a3.-4(x+2)(x-2)4.C5.D6.D 7.(1)3c3-4a2b12ab2c2;(2)6x2+xy+7y242x2y2;(3)2mn-m2n2-m2.8.-659.(1)11-a;(2)x2.10.1(x-1)(x-2),1(x-2)(x-3),1(x-3)(x-4),1x-100.第3课时
1.C2.D3.B4.(1)a-bb;(2)x+2.5.12 6.∵ca+b<1.∴c2(a+b)2<ca+b 3.6第1课时
1.(1)7x4y;(2)b2a;(3)2x-y;(4)a+ba-b2.ala+b,ala+b.3.23;49;13.4.A5.C6.(1)2;(2)2;(3)4.7.6 8.(1)xyx+y(天);(2)甲:myx+y(元),乙:mxx+y(元).9.(1)ba;(2)b-10a-10,b+10a+10;(3)b-10a-10<ba<b+10a+10.第2课时
1.略.2.8∶93.124.245.C6.D7.8a3 8.a-b=-39.260 mm10.5211.-5.第3课时
1.略.2.2∶33.33124.1 m5.10∶15∶216.D7.B8.x∶y∶z=(a+b)2∶(a2-b2)∶(a-b)29.34a,a,54a.10.6,8,10.11.63人,192人,45人.3.7第1课时
1.略.2.去分母,将分式方程转化为整式方程求解,然后验根.3.-124.-325.B6.B7.D8.30x-2-30x=12.9.(1)x=4;(2)x=0.10.m=-187 11.(1)x=5;(2)a=6.第5个方程;(3)1+x2x=n+1x,x=2n+1.第2课时
1.略.2.无解3.C4.B5.不正确,错在第3步,没有检验;方程无解.6.(1)x=3;(2)无解;(3)无解;(4)无解.7.a=-58.(1)①x=1;②x=2;③x=3;(2)方程1x-2-1x-3=1x-5-1x-6的解为x=4;方程1x+2-1x+1=1x-1-2x-2的解为x=0.第3课时
1.略.2.12010-x-12010=33.16+1x=13.4.D 5.(1)设去年每间屋的租金为x元,9.6x=10.2x+500;(2)8 000元.6.4 km/h7.37.5 km/h8.1.5 t 9.(1)设预定工期为x天,4x+xx+5=1,x=20(天).(2)采取联合施工4天,然后由乙单独施工的方案省工程费.第三章综合练习
1.a≠32;x=-1.2.m=3,m≠1.3.24.12 5.a∶b=b∶c,c∶b=b∶a,ac=b26.127.3∶4∶58.39.C10.C11.A12.D13.B14.D15.616.a+b=0.17.(1)-5y2ax;(2)-x3y;(3)2xy;(4)3x+1;(5)1681x4y4;(6)2a2b2;(7)a-3a2-13;(8)-1a+1.18.(1)-715;(2)310.19.S1∶S2=1∶220.218 21.(1)无解;(2)x=1912;(3)x=-2;(4)无解.22.应提高60 km/h23.(1)x≠-1,0,1;(2)原式=1.24.1次清洗.残留农药比为11+y;分两次清洗后,残留农药比为:4(2+)2,11+y-4(2+y)2=y2(1+y)(2+y)2>0.第2种方案好.检测站
1.x≠32,x=-23.2.x≠0且x≠-53.164.29 5.326.D7.C8.B9.B10.相等11.(1)mn-m;(2)ab;(3)2x-1x.12.11-x;-1.13.(1)x=4;(2)无解;(3)x=2.14.a=-115.14516.3617.28天 4.1第1课时
1~2.略.3.3.44.C5.B6.总产量1 757 t;平均产量8.53 t.7.9 000 m3 8.a·10%+b·15%+c·5%a+b+c(a,b,c为甲、乙、丙三种汽油原价)第2课时
1.820,920,320.2.86 km/h3.C4.(1)甲;(2)乙.5.9.9%6.(1)1.84 kg;(2)3 312 kg.4.2 1.略.2.94.53.C4.x=225.平均数:1 626,中位数1 680.6.26 cm7.9或108.(1)85.5;(2)41人;(3)高低分悬殊大.4.3第1课时
1.2;1与2.2.7与83.B4.平均数、中位数、众数都是21岁5.平均数为2,中位数是3,众数是1.6.(1)3个;(2)32 000个.7.(1)甲组:平均数80,中位数80,众数90;乙组:平均数80.2,中位数80,众数70;(2)略.第2课时
1.72.A3.平均数13千瓦时,中位数22.5千瓦时,众数10千瓦时.4.(1)众数55 min,中位数55 min;(2)平均数为55 min.符合学校的要求.5.甲当选 4.4 1~2.略.3.(1)平均直径都是20 mm;(2)小明.4.乙地;甲地温差比乙地大.5.(1)平均身高都是178 cm;(2)图略.甲队整齐.6.(1)x甲=1.69 m,x乙=1.68 m;(2)图略.甲比较稳定.4.5第1课时 1.1.22.10,26.3.10,1.8.4.A5.D6.S2甲=0.055,S2乙=0.105;果农甲.7.(1)x=3,S2=2;(2)x=13,S2=2;(3)x=30,S2=200.8.(1)xA=0,S2A=2.29;(2)取-2,-1,0,3,0;xB=0,S2B=2.8.第2课时
1.乙2.D3.(1)略;(2)大刚的平均数为13.35,方差为0.004;小亮的平均数为13.3,方差为0.02.大刚成绩好.4.(1)x苹果=8,x香蕉=8,S2苹果=9,S2香蕉=1.333;
(2)略;(3)9月份多进苹果.5.S2=1n[(x1-x)2+(x2-x)2+…+(xn-x)2]=1n[x21+x22+…+x2n-2x(x1+x2+…+xn)+nx2]=1n[x21+x22+…+x2n-2nx(x1+x2+…+xnn+nx2)]=1n[x21+x22+…+x2n-nx2].4.6 1.C2.略3.甲4.相差75.x甲=178,S2甲=0.6;x乙=178,S2乙=1.8.6.(1)x甲=200.8,S2甲=7.96;x乙=201.5,S2乙=38.05;(2)甲.第四章综合练习
1.1.62 m2.8,8,8,1.23.20,18,184.4,3.5.b>a>c6.C7.D8.C9.(1)甲组:x甲=3.中位数2,众数1,S2甲=7.67;乙组:x乙=3,中位数3,众数3,S2乙=1.67;(2)乙组.10.(1)x=2 135.7(元),众数为800元,中位数为1 600元;(2)略.11.(1)x=2,众数为3,中位数为2;(2)68人.12.(1)22℃;(2)20.8℃;(3)146天.13.乙成绩稳定 检测站
1.2.12元2.23.64.31.8℃,4.965.D6.C 7.D8.90.6分9.(1)x甲=5.6 cm,S2甲=1.84,x乙=5.6 cm,S2乙=1.04.(2)乙苗长的比较整齐.10.(1)x甲=7,S2甲=0.4,x乙=7,S2乙=2.8;(2)甲.11.6 12.(1)甲班:平均分24,方差5.4;乙班中位数24,众数21,方差19.8;(2)甲班42人,乙班36人;(3)甲班.综合与实践 略.5.1 1~2.略.3.面积相等的三角形,是全等三角形,假.4.D5.D6.B7~9.略.5.2 1.略.2.不正确.如正方形与菱形.3.小亮不对;小莹说法正确.4.不正确.如2≠-2,但22=(-2)2.5.不正确;t=20t1+30t220+30.5.3 1~3.略.4.C5.直角定义;余角定义;对顶角相等;等量代换;余角定义.6.(1)C,E,F,G;(2)E;(3)K;(4)略.7.C 5.4 1.B2.C3.(1)∠D;内错角相等,两直线平行;(2)∠DEC;AB∥DE.同位角相等,两直线平行.4.已知:∠CBE;两直线平行,同位角相等;已知,∠CBE;等量代换;内错角相等,两直线平行.5.略.6.(1)如果两个角相等,那么这两个角是同角或等角的补角.真命题;(2)如果三角形中有两个角是锐角,那么第三个角是钝角,假命题,如∠A=80°,∠B=70°,∠C=30°.7.(1)延长AE与CD相交于点G.∵AB∥EF.∴∠A+∠AEF=180°.∵AB∥CD,∴∠A+∠G=180°.∴∠A+∠AEF=∠A+∠G,∠AEF=∠G.∴EF∥CD;(2)360°.5.5第1课时
1.略.2.C3.D4.∠B=∠C,∠AOB=∠DOC.5.∠1>∠ACB>∠26.略.7.(1)∠A逐渐减小,∠B,∠C逐渐变大;若点A向下运动,变化相反;(2)α=β+γ.5.5第2课时
1.(1)∠B=∠DAC;(2)∠A=∠D;∠CGE+∠B=180°.2.D3.B4.略.5.∠1=∠C+∠CDE,∠2=∠C+∠CED,∠1+∠2=180°.6.(1)∠EFD=90°-∠FED=12(∠A+∠B+∠C)-(∠B+12∠A)=12(∠C-∠B);(2)不变.5.6第1课时
1.D2.C3.(1)BC=EF或BE=CF;(2)∠A=∠D;(3)∠C=∠F.4.(1)△ABE≌△DCF(SAS),△ABF≌△DCE(SAS),△BEF≌△CFE;(2)略.5.△AFC≌△BED(ASA)6.取EF的中点M,连接GM,并延长交FH于点N.GN分别交AD,BC于点P,Q.△PEM≌△QFM.沿GN将道路取直即可.第2课时
1.平行2.90°3.B4.D5.∵∠ABD=∠ADB,∴∠CBD=∠CDB.∴BC=DC.6.△ABD与△ACD都是等腰三角形,BD=AD=DC.7.△ABD≌△ACE(SAS).∠A=∠CAE=60°.∴△ADE为等边三角形.8.∵△AEB≌△BDA(ASA).∴AE=BD,EB=DA,CE=CD,EF=DF.AF=BF.第3课时
1.=2.①②③3.A4.略.5.△ABD≌△AED(SAS),∴AB=AE.DC=AB+BD=AE+DE,DC=DE+EC,∴AE=EC.∴点E在线段AC的垂直平分线上.6.(1)∠A≠∠C.因为△ABD与△CBD不全等;(2)∠A>∠C.因为AB<BC,在BC上取BA′=BA.△ABD≌△A′BD.∠A=∠BA′D.∠BA′D>∠C,∴∠A>∠C;(3)当AB=CB时.∠A=∠C;当AB<BC时,∠A>∠C;当AB>BC时,∠A<∠C.第4课时
1.OA=OB.2.=.三角形的三内角平分线相交于一点.3.B4.B5.△ADE≌△ADF.AE=AD.△AEF为等腰三角形.6.△BEO≌△BFO(AAS),△BED≌△BFD(SAS).△EOD≌△FOD(SSS)或(SAS).7.DE=BD-CE.由DE∥BC.∠BOD=∠OBC=∠OBD.∴BD=OD.又∠OCE=∠OCF=∠BOC+∠OBC=∠BOC+∠BOE=∠COE.∴CE=OE.DE=OD-OE=BD-CE.第5课时
1.AB=AD或BC=DC(HL)2.D3.B4.作直线MN,过MN上一点D作MN的垂线l;在直线l上截取DA=h;以A为圆心,a为半径画弧交MN于点B,C两点;连接AB,AC.△ABC即为所求.5.连接AC.Rt△ABC≌RtADC(HL).∴BC=DC.Rt△BCE≌Rt△DCF(HL).6.连接AF,BF.△AEF≌△BEF△AFC≌△BFD(SAS).7.(1)Rt△OBD≌Rt△OCE(HL);(2)Rt△OBD≌△OCE(HL);(3)相等.第五章综合练习
1.A2.C3.D4.B5.D6.略.7.120°8.∠2=∠1.∴∠2=∠C,AB∥CD.9.延长EF交BC于点G.∵∠2=∠4,∴AB∥EF.∠3=∠B=∠EGC.∴DE∥BC.∴∠AED=∠ACB.10.∠ABE=∠FBD,∠ABE+∠AEB=90°,∠FBD+∠AFE=90°.∴∠AEB=∠AFE.∴AE=AF.11.△ACE≌△BDE(AAS),∴EC=ED.12.(1)∠D=∠AEC(同角的余角相等).△ACE≌△CBD.∴AE=CD;(2)BD=CE=12AC=6 cm.13.(1)Rt△ADE≌Rt△ADF;(2)DB=DC,Rt△DBE≌Rt△DCF(HL).14.(1)略;(2)连接BD.∠DBC=12∠B=30°.∵∠CDE=∠CED.∴∠CED=12∠ACB=30°.∴△DBE为等腰三角形.∵DM⊥BE,∴BM=EM.15.△BPD≌△BDC(SAS),△BCD≌△ACD(SSS).∠P=∠BCD=∠ACD=12∠ACB=30°.16.(1)作DF⊥AB,垂足为点E.AC=AE,DE=DC.∵∠B=∠A=45°,∴BE=DE.∴AB=AE+BE=AC+CD.(2)(1)中的等量关系仍成立.∵∠ACB>∠B,∴AB>AC.在AB上截取AG=AC.分别作DF⊥AC,DE⊥AB.△DCF≌△DGE.∵∠EGD=∠C=2∠B.∴∠B=∠BDG.BG=DG=DC.∴AB=AG+GB=AC+CD.检测站
1.A2.C3.C4.三;△ODG≌△OEG,△DPG≌△EPG;△ODP≌△OEP,HL或AAS.5.略.6.FA=FD,∠ADF=∠DAF=∠DAC+∠CAF.∵∠DAC=∠BAD.∴∠B=∠ADF-∠BAD=∠DAF-∠DAC=∠CAF.7.(1)略;(2)∵CA=CE,∴∠CAE=∠E.∵∠ACB=∠CAE+∠E=2∠E,∠ACB=2∠BCD,∴∠E=∠BCD.CD∥AE.8.(1)①③或②③;(2)略.9.(1)△ABQ≌△PBC;(3)∠MBN=60°,△ABM≌△PBN(ASA).BM=BN.∴△BMN为等边三角形.∠MNB=∠QBC.MN∥AC.总复习题
1.(3,4),等腰2.-53.50°,60°,70°.4.略.5.5,5.6.D7.C8.D9.B10.D11.(1)11-x;(2)x2-xy-2y23xy2;(3)-(1-m)2;(4)1-a.12.32°13.-314.设每天修x m,3 600x-3 6001.8x=20.x=80 m.15.(1)中位数12℃,众数11℃;(2)1.143.16.分别作FG⊥BC,FM⊥AD,FN⊥AE,垂足分别为点G,M,N.FM=FG=FN.17.∵∠BAD=∠BDA,∴AB=DB=CD.∵BE=DE,∴△ABE≌△ADE.AB=AD,△ABD为等边三角形.连接CF.△AEC≌△FEC.∵∠ACF=60°,∴△AFC为等边三角形.∴AF=AC,AE=12AC.18.延长BO交AC于点D.∠BOC=110°.19.作CF⊥AC,交AD延长线于点F.∵∠BAC=90°,AD⊥BM.∴∠ABM=∠MAE.∵AB=AC,∴△ABM≌△CFA.∠1=∠F.AM=CF.∵AM=CM,∴CF=CM.∠FCD=45°=∠MCD.∴△FCD≌△MCD(SAS).∠2=∠F=∠1.总检测站
1.a-12.(1)SSS;(2)SAS;(3)HL.3.5,5,5.25.4.4,3.5.△ABC≌△ABD,△ACE≌△ADE,△CEB≌△DEB.6.C7.D8.D9.D10.B11.113 850 kg 12.(1)x=-2;(2)无解.13.30 m14.∵△ABE≌△ACE,∴BE=CE,BD=CD.△BDE≌△CDE(SSS).15.(1)①②③④,①③②④,①④②③,②③①④,②④①③.(2)略.≤≥<>×≠÷′△∠°αβ⊥∥∵∴△≌△S△ACC′1.2.3.4.5.6.7.8.9.10.
第四篇:新目标英语九年级unit7配套练习册答案
Unit 7 WHere would you like to visit
Section A
I 1.educational 2.thrilling 3.to trek through the jungle 4.too stressed out 5.consider asking
II 1.thrillers;thrilling 2.to tour;touristy;tourists;tour 3.relaxing;relaxes;relaxed 4.tired;tiring 5.lively;lived;alive;liveliest
III.1.where there are;with 2.are supposed to 3.who can 4.is supposed to be 5.would like to
Section B
I.1.provide 2.easy 3.light 4.including 5.vacations
II.1.provide us with some useful information 2.In general;junk food 3.Traveling around;by taxi convenient to take;to most places 4.Unless you speak;yourself;it’s best;someone who can translate 5.which is best to travel by
6.give her some suggestions 7.is the most expensive;is 8.get a room with a kitchen
III.1~6 ADBABC
IV.1~5 DFCBE
Self Cheak and Reading
I.1.in which thousands of;take part in 2.find out;answers to;as soon as possible 3.According to;the most popular choice of job 4.continue singing;so that;provide better lives for 5.It seems;work as
6.Quite a few;are willing to
7.hold on to;come true 8.On the one hand;on the other hand 9.volunteer translators;translated;for
II.1.as soon as they can 2.provie;with 3.less realistic than 4.were ready to 5.in order that
III.1~5 CDBAC 6~10 CADDB
第五篇:新目标九年级英语unit 8配套练习册答案
Unit8 l'll help clean up the city parks.Secion
A
I.II.III.1.makes;happier 2.establish;learn 3.thinks up 4.to do 5.Do you
IV.1~6 DCCACB
Section
B I.II.1.ran out of 2.takes after 3.put up 4.call up 5 give out 6 trying to
III.1.takes after 2.spent on spent buying 3.similar to 4.repair 5.What did
IV.1~6 BAAABC 1.deaf 2.fix 3.pleasure 4.shut 5.fetch 1.homeless 2.hunger 3.established 4.coach 5.sign 1.set up 2.think up 3.cheer;up 4.clean up 5.put off 6.put up V.1~5 FGADC 6~7 EB
Self Check and Reading
I.1.fetch 2.pleasure 3.blind 4.imagine 5.specially 6.filled 7.carried 8.deaf 9.shut ting 10.worked out
II.1.homeless 2.later 3.easiest 4.hunger 5.pleasure 6.holding 7.clean 8.cheered 9.to set 10.interviewer
III.1~5 ACBBA 6~10 ACAAB 11-14CBAD
IV.1.old enough to 2.How many does have 3.run out of 4.spends on 5.takes after 6 were playing 7 Would have 8 How do Ⅴ BDACC BACAB Ⅵ 略