第一篇：七年级下数学练习册北师大版c版答案【新】西安市二十六中学 初一三班 淡 竹
西安市二十六中学初一三班
淡
竹
提供
西安市二十六中学初一三班
淡
竹
提供
西安市二十六中学初一三班
淡
竹
提供
西安市二十六中学初一三班
淡
竹
提供
西安市二十六中学初一三班
淡
竹
提供
西安市二十六中学初一三班
淡
竹
提供
西安市二十六中学初一三班
淡
竹
提供
第二篇：初一数学练习册答案 七年级数学练习册答案 初一数学练习册 数轴测试题
数轴测试题
基础检测1、2、在数轴上表示-4的点位于原点的 边，与原点的距离 画出数轴并表示出下列有理数：1.5,2,2,2.5，,0.9223是 个单位长度。
3、比较大小，在横线上填入“＞”、“＜”或“=”。
0；0-1；-1-2；-5-3；-2.5 2.5.拓展提高
4.数轴上与原点距离是5的点有 个，表示的数是。
5.已知x是整数，并且-3＜x＜4，那么在数轴上表示x的所有可能的数值有。
6.在数轴上，点A、B分别表示-5和2，则线段AB的长度是。7.从数轴上表示-1的点出发，向左移动两个单位长度到点B，则点B表示的数是，再向右移动两个单位长度到达点C,则点C表示的数是。
8.数轴上的点A表示-3，将点A先向右移动7个单位长度，再向左移动5个单位长度，那么终点到原点的距离是 个单位长度。
数轴答案
基础检测1、2、画数轴时，数轴的三要素要包括完整。图略。左，4
3、＞＞＞＜＜
拓展提高
4.两个，±5 5.-2，-1，0，1，2，3 6.7 7.-3，-1 8.1
本文档由中国最大型的数学教师培训集团深本数学提供
第三篇：七年级下数学练习册答案
学习效率的高低,是一个学生综合学习能力的体现。在学生时代,学习效率的高低主要对学习成绩产生影响。多看多学，才会进步。下面就是小编为大家梳理归纳的内容，希望能够帮助到大家。
七年级下数学练习册答案
平行线的判定第1课时
基础知识
1、C2、ADBCADBC180°-∠1-∠2∠3+∠43、ADBEADBCAECD同位角相等，两直线平行
4、题目略
MNAB内错角相等，两直线平行
MNAB同位角相等，两直线平行
两直线平行于同一条直线，两直线平行
5、B6、∠BED∠DFC∠AFD∠DAF7、证明：
∵AC⊥AEBD⊥BF
∴∠CAE=∠DBF=90°
∵∠1=35°∠2=35°
∴∠1=∠2
∵∠BAE=∠1+∠CAE=35°+90°=125°∠CBF=∠2+∠DBF=35°+90°=125°
∴∠CBF=∠BAE
∴AE∥BF(同位角相等，两直线平行)
8、题目略
(1)DEBC
(2)∠F同位角相等，两直线平行
(3)∠BCFDEBC同位角相等，两直线平行
能力提升
9、∠1=∠5或∠2=∠6或∠3=∠7或∠4=∠810、有，AB∥CD
∵OH⊥AB
∴∠BOH=90°
∵∠2=37°
∴∠BOE=90°-37°=53°
∵∠1=53°
∴∠BOE=∠1
∴AB∥CD(同位角相等，两直线平行)
11、已知互补等量代换同位角相等，两直线平行
12、平行，证明如下：
∵CD⊥DA，AB⊥DA
∴∠CDA=∠2+∠3=∠BAD=∠1+∠4=90°(互余)
∵∠1=∠2(已知)
∴∠3=∠4
∴DF∥AE(内错角相等，两直线平行)
探索研究
13、对，证明如下：
∵∠1+∠2+∠3=180°∠2=80°
∴∠1+∠3=100°
∵∠1=∠3
∴∠1=∠3=50°
∵∠D=50°
∴∠1=∠D=50°
∴AB∥CD(内错角相等，两直线平行)
14、证明：
∵∠1+∠2+∠GEF=180°(三角形内角和为180°)且∠1=50°，∠2=65°
∴∠GEF=180°-65°-50°=65°
∵∠GEF=∠BEG=1/2∠BEF=65°
∴∠BEG=∠2=65°
∴AB∥CD(内错角相等，两直线平行)
七年级下数学练习册答案
平行线的判定第2课时
基础知识
1、C2、C3、题目略
(1)ABCD同位角相等，两直线平行
(2)∠C内错角相等，两直线平行
(3)∠EFB内错角相等，两直线平行4、108°
5、同位角相等，两直线平行
6、已知∠ABF∠EFC垂直的性质AB同位角相等，两直线平行已知DC内错角相等，两直线平行ABCD平行的传递性
能力提升
7、B8、B9、平行已知∠CDB垂直的性质同位角相等，两直线平行三角形内角和为180°三角形内角和为180°∠DCB等量代换已知∠DCB等量代换DEBC内错角相等，两直线平行
10、证明：
(1)∵CD是∠ACB的平分线(已知)
∴∠ECD=∠BCD
∵∠EDC=∠DCE=25°(已知)
∴∠EDC=∠BCD=25°
∴DE∥BC(内错角相等，两直线平行)
(2)∵DE∥BC
∴∠BDE+∠B=180°即∠EBC+∠BDC+∠B=180°
∵∠B=70°∠EDC=25°
∴∠BDC=180°-70°-25°=85°
11、平行
∵BD⊥BE
∴∠DBE=90°
∵∠1+∠2+∠DBE=180°
∴∠1+∠2=90°
∵∠1+∠C=90°
∴∠2=∠C
∴BE∥FC(同位角相等，两直线平行)
探索研究
12、证明：
∵MN⊥ABEF⊥AB
∴∠ANM=90°∠EFB=90°
∵∠ANM+∠MNF=180°∠NFE+∠EFB=180°
∴∠MNF=∠EFB=90°
∴MN∥FE
七年级下数学练习册答案
1.2.1有理数
一、1.D2.C3.D
二、1.02.1,-13.0,1,2,34.-10
三、1、自然数的集合：{6,0,+5,+10…｝整数集合：{-30,6,0,+5,-302,+10…｝
负整数集合：{-30,-302…｝分数集合：{,0.02,-7.2，,2.1…｝
负分数集合：{,-7.2,…｝
非负有理数集合：{0.02，6,0,2.1,+5,+10…｝;
2、有31人可以达到引体向上的标准3.(1)(2)0
1.2.2数轴
一、1、D2、C3、C
二、1、右5左32.3.-34.10
三、1、略2、(1)依次是-3,-1,2.5,4(2)13，±1，±3
1.2.3相反数
一、1.B2.C3.D
二、1.3,-72.非正数3.34.-9
三、1.(1)-3(2)-4(3)2.5(4)-6
2.-33.提示:原式==
1.2.4绝对值
一、1.A2.D3.D
二、1.2.3.74.±4
三、1.2.203.(1)|0|<|-0.01|(2)>
拓展：有理数知识概念
1、有理数：
(1)正整数、0、负整数统称整数;正分数、负分数统称分数;整数和分数统称有理数.注意：0即不是正数，也不是负数;-a不一定是负数，+a也不一定是正数;p不是有理数;
(2)有理数的分类:
2、数轴：数轴是规定了原点、正方向、单位长度的一条直线.3、相反数：
(1)只有符号不同的两个数，我们说其中一个是另一个的相反数;0的相反数还是0;
(2)相反数的和为0a+b=0a、b互为相反数.4、绝对值：
(1)正数的绝对值是其本身，0的绝对值是0，负数的绝对值是它的相反数;注意：绝对值的意义是数轴上表示某数的点离开原点的距离;
(2)绝对值的问题经常分类讨论;
5、有理数比大小：(1)正数的绝对值越大，这个数越大;(2)正数永远比0大，负数永远比0小;(3)正数大于一切负数;(4)两个负数比大小，绝对值大的反而小;(5)数轴上的两个数，右边的数总比左边的数大;(6)大数-小数>0，小数-大数<0.6、互为倒数：乘积为1的两个数互为倒数;注意：0没有倒数;若a≠0，那么初中数学知识点总结(初一)的倒数是初中数学知识点总结(初一);若ab=1a、b互为倒数;若ab=-1a、b互为负倒数.7、有理数加法法则：
(1)同号两数相加，取相同的符号，并把绝对值相加;
(2)异号两数相加，取绝对值较大的符号，并用较大的绝对值减去较小的绝对值;
(3)一个数与0相加，仍得这个数.8、有理数加法的运算律：
(1)加法的交换律：a+b=b+a;(2)加法的结合律：(a+b)+c=a+(b+c).9、有理数减法法则：减去一个数，等于加上这个数的相反数;即a-b=a+(-b).10、有理数乘法法则：
(1)两数相乘，同号为正，异号为负，并把绝对值相乘;
(2)任何数同零相乘都得零;
(3)几个数相乘，有一个因式为零，积为零;各个因式都不为零，积的符号由负因式的个数决定.11、有理数乘法的运算律：
(1)乘法的交换律：ab=ba;(2)乘法的结合律：(ab)c=a(bc);
(3)乘法的分配律：a(b+c)=ab+ac.12、有理数除法法则：除以一个数等于乘以这个数的倒数;注意：零不能做除数，初中数学知识点总结(初一).13、有理数乘方的法则：
(1)正数的任何次幂都是正数;
(2)负数的奇次幂是负数;负数的偶次幂是正数;注意：当n为正奇数时:(-a)n=-an或(a-b)n=-(b-a)n,当n为正偶数时:(-a)n=an或(a-b)n=(b-a)n.14、乘方的定义：
(1)求相同因式积的运算，叫做乘方;
(2)乘方中，相同的因式叫做底数，相同因式的个数叫做指数，乘方的结果叫做幂。
七年级下数学练习册答案
第四篇：2013新人教版初一七年级下册英语全套练习册答案
2013新人教版初一七年级下册英语全套练习册答案 Unit 1 Section A I.1.dance 2.sing 3.swim 4.paint 5.pay chess 6.play the guitar 7.play the piano 8.English club 9.swimming club 10.want to join a club 11.be good at Ⅱ.1.Can 2.want 3.join;swimming 4.do 5.or 6.in Ⅲ.1-5 CBAAC 6-9 BCBB Section B I.1.speak 2.violin 3.club 4.tell 5.does Ⅱ.1.tell stories 2.play chess 3.play the drums 4.play the violin 5.play the piano 6.play basketball 7.sing and dance 8.English-speaking students 9.make friends 10.can do kung fu 11.call sb at 12.musicians wanted 13.come and show us 14.help with sports 15.music festival Ⅲ.1-5 BBCBB
6-8 ACC Self Check 1 I.1.singing 2.piano 3.chess 4.painting 5.musician Ⅱ.1.do 2.to 3.want 4.club 5.play 6.can’t
Ⅲ.1.with my 2.Is;with;is 3.Can I help you? 4.can’t do 5.What can;do 6.What;does;want IV.sing;Can;do;play;the violin Self Check 2 I.1-5 CAABC II.1.students 2.swimming 3.Chinese 4.musicians 5.stories III.1-5 ACABB 6-10 CBACA IV.1-5 CDBEA V.1-5 BACCA 6-8 ABC VI.1-5 BBCCB VII.One possible version:
There are six musicians in our school band.They are very talented.My favorite musician is Li Hua.She is the best.She can sing and dance well.She can play the piano, too.Wang Hai can play the trumpet.Li Jun can play the violin.Cai Ming can sing and play the violin.Chen Hui and Chen Yang can play the drums.Unit 2 Section A I.1.go to school 2.get up 3.eat/ have breakfast 4.take a shower 5.get dressed 6.go to work 7.brush teeth 8.radio station 9.be late for work 10.at eleven 0’clock II.1-5 CACCA 6-10 CCCCB III.1.What time does;go 2.What do;to do 3.doesn’t do
4.Does;start;does 5.don’t think Section B I.1.do homework 2.go home 3.at about six thirty 4.go to bed 5.be good for 6.either...or 7.get home 8.a quarter to seven 9.after school 10.take a walk 11.play sports 12.eat vegetables II.1-5 BACBC 6-8 ACB III.1-5 ABCCA 6-7 BC
Self Check 1 I.1.usually 2.shower 3.evening 4.about/ around 5.healthy 6.gets 7.job 8.Saturday II.1-5 BBCAC 6-9 BABC III.1-5 DACBE IV.1.their 2.me 3.funny 4.brushes 5.Does;work 6.takes 7.to know 8.doesn’t do Self Check 2 I.1-5 CABBC II.1.does;do 2.to sleep 3.does;work 4.puts 5.speak 6.do;have 7.Tell 8.gets 9.Look III.1-5 BABCB 6-10 CBABC IV.1.time 2.at 3.early 4.have 5.and 6.about 7.do 8.by 9.on 10.take V.1.comes 2.school 3.days 4.students 5.teaches 6.playing 7.like 8.Chinese 9.talks 10.Sunday VI.1-5 TTFFF VII.One possible version:
Hi!I’m Jack.I usually get up at 6:50 in the morning.Then I eat breakfast at around 7:20.At around 7:45, I go to school.I have lunch at 12:00 in the school.After school, I sometimes play basketball for half an hour.Then I go home at 5:30.I have dinner at 6:20.After dinner I do my homework and watch TV for a while.I go to bed at 10:00.Unit 3 Section A I.1.ride a bike 2.forty-six minutes 3.take the subway 4.take the bus 5.walk to school 6.get to school 7.drive a car 8.how far 9.it takes...to do sth.10.how long II.1.ride 2.walks 3.takes 4.train 5.minutes III.1-5 ACBCB 6-10 ACBCA IV.1-5 CAEBD
Section B I.1.kilometers 2.village 3.early 4.bridge 5.cross II.1-5 BABCC 6-10 BBACB
III.1.How 2.How far 3.How long 4.Where 5.What Ⅳ.1.ride;station;take 2.most;to get to 3.eleven-year-old;crosses;school 4.How far does;live 5.ride;boring;talk with V.1-5 ACBAB 6-10 CACAC Self Check I.1-5 CBCAA II.1-5 ACBED III.1-5 ABBCA 6-10 AACAC IV.A: 1-5 FTFFT B: 1-5 FTTFT V.One possible version:
Mary’s home is about three kilometers from school.She usually goes to school by bus.It takes about ten minutes.Tom lives about five kilometers away from school.He goes to school in his father’s car.It takes twelve minutes.Simon and Bill are brothers.Their home is eight kilometers from school.They take the subway to school.It takes about twenty minutes.Jesse lives near the school.It’s only two kilometers from her home to school.So she goes to school on foot.It takes twenty-five minutes.Unit 4 Section A I.1.uniform 2.eat 3.can’t 4.hallway 5.keep 6.quiet II.1-5 BACAA III.1.run in the hallway 2.be/ arrive late for school 3.eat in the classroom 4.listen to music 5.wear hats 6.has to;gym class 7.Do;wear school uniforms 8.What else Section B I.1-5 ACBAC 6-8 BAC II.School rules：1，2，6，7，11，14 Library rules：9，12，15 Traffic rules：4，10，13 House rules：3，5，8 Self Check 1 I.1-5 CBAAC II.1.can’t come 2.Don’t do 3.When do;have 4.Does;have to 5.What;think of III.A.(1, 2)B.(2, 3)C.(1, 2)D.(3)E.(3)F.(2)Self Check 2 I.1-5 BCCAA 6-10 CBBAA II.1-5 TFTFT III.One possible version: Dear David, I’d like to tell you the rules in our school.We have too many rules.We can’t run in the hallways.We can’t arrive late for class.We can’t listen to music in the classroom.And we have to wear our school uniforms.We have to clean our classroom and do homework every day.What do you think of our rules? Please write to me soon and tell me your school rules.Yours，Li Ping
Unit 5 Section A I.1.south 2.Pandas 3.zoo 4.map 5.elephant II.1-5 BAABB III.1.Why;very cute 2.does;like;Because;kind of interesting 3.animal;dogs;Why;friendly and smart 4.are;from;are from South Africa IV.1-5 DACBE V.1.They are fromAustralia.2.Yes, they are.3.Where do 4.from;too 5.Are tigers beautiful animals? Section B I.1-5 ACABC 6-10 CACAA II.1.danger 2.quiet 3.lazy 4.to relax 5.scary III.1-5 BABAB Ⅳ.1-5 CEADB V.1.kind of 2.South Africa 3.get lost 4.be in danger 5.cut down 6.be made of Self Check 1 I.1-5 AAACC II.1.Do；eat 2.doesn’t do 3.Can you 4.Why;like 5.Where are；from III.1.It’s next to the zoo entrance.2.It is large.3.There aren’t many interesting animals in the zoo.4.Why are giraffes interesting? 5.How many pandas are there in Panda House? Self Check 2 I.1.leaves 2.friendly 3.beginning 4.animals 5.Chinese II.1-5 CACAB 6-10 CCACB III.1-5 FTTFF IV.One possible version:
I have a small dog.Its name isCoco.It’s brown with two big eyes.It’s very smart and friendly.Its favorite food is bones.It likes to take a walk with me every day.Unit 6 Section A I.1.do homework 2.watch TV 3.make soup 4.talk on the phone 5.go to the movies 6.eat out 7.use the computer 8.wash the dishes 9.read a newspaper 10.are;doing;watching 11.doing;is doing homework 12.doing;is reading 13.to go to the movies;Certainly;boring;When;Let’s go 14.reading 15.going II.1-5 CACBC III.1-5 DBAEC Section B I.1.swimming 2.library 3.misses 4.delicious 5.reading II.1.is shopping 2.are watching 3.photos 4.cleans 5.play III.1-5 BBACB IV.1-5 ACBAB Self Check 1 I.1-5 CCAAC II.1-5 CBCAA 6-10 CBBCA III.One possible version:
It’s five o’clock in the afternoon.Some students are in the classroom.They are doing different things.Two boys are cleaning the windows.Li Fang is reading a book.Wang Lin is doing homework.Lucy and Lily and talking.And Zhu Tao is drawing a picture.Self Check 2 I.1-5 CBBCA II.1.swimming 2.shopping 3.libraries 4.children 5.photos 6.leaves 7.studies 8.plays 9.dirty 10.dangerous III.1-5 AABBC 6-10 ACCBA IV.1.They are at home.2.He is Tom’s classmate and good friend.3.Who is in the kitchen? 4.Where is Mr.Black? 5.What are they doing now?
Unit 7 Section A I.1.snowy / snowing 2.playing 3.is 4.are running 5.clean II.1-5 BBAAC III.1-6 FBDEAC IV.1-5 FTFTT Section B I.1-5 BACCA II.A)1.summer 2.cooking 3.aunt 4.hot 5.doctor B)6.windy 7.relaxing 8.are watching 9.playing 10.to call III.1.not bad 2.studying inToronto 3.cold and snowing 4.pretty good 5.sunny and hot Self Check 1 I.1-5 BACBC II.1.What is the weather like now? 2.What are you doing at home? 3.That sounds like fun.4.How is it going with your family? 5.She is calling to say happy birthday.III．1.How’s；weather 2.What’s the weather like 3.What is； wearing 4.What’s the weather like/ How is the weather 5.What an interesting place 6.What bad 7.very snowy
Self Check 2 I.1-5 BCABC II.1.How’s the weather;What’s the weather like;hot and dry 2.How’s it going;Great 3.beautiful;sunny 4.take a message 5.call me back 6.many people;on vacation 7.summer school 8.by the pool 9.a very interesting place 10.It’s winter 11.having a good time 12.in the rainy weather III.1-5 CBABC 6-10 CAACB IV.One possible version:
It is 5:30 on Saturday afternoon.The weather is sunny.Jack and his family are all at home.They are doing different things.Jack is doing homework in his bedroom.His mother is cooking dinner in the kitchen.His father is washing the car in the yard.His grandfather and grandmother are watching TV in the living room.Unit 8 Section A I.1.near here 2.on 3.across from 4.next to 5.in front of 6.between;and 7.behind the library 8.in the neighborhood 9.post office 10.pay phone 11.go straight 12.turn left II.1.between 2.post office 3.library 4.supermarket 5.across III.1-5 BCCBA IV.1.There isn’t 2.Are；any 3.Where is 4.behind 5.near here V.1.there was no petrol left 2.a woman 3.West Street 4.walked 5.the petrol station was closed Section B I.1.go along the street 2.turn right 3.at the first crossing 4.spend time 5.enjoy reading 6.on your right II.A)1.zoo 2.behind 3.across 4.front 5.library B)6.turning 7.easily 8.yours 9.playing 10.neighborhood III.1-5 ACABA IV.1-5EACDB V.1.It’s onGuangming Street.2.Yes, it is.3.Is there a big garden across from your school? 4.How many buildings are there in your school? 5.Where can I find your school? Self Check 1 I.1-5 AAACC II.1-5 BCCAB 6-10 CCABA III.1-5 FTFTF Self Check 2 I.1.Excuse 2.Where 3.Sorry 4.ask 5.know 6.way 7.along/down 8.take 9.turning 10.see/find II.1-5 BCACA 6-10 CCBAC III.1.He’s from Canada.2.He’s looking for his parents.3.He’s going to the People’s Park.4.Jack is.5.He’s going there by taxi.Unit 9 Section A I.1.curly 2.height 3.brown / blonde 4.cinema 5.heavy II.1-5 BBACC III.1.look like 2.short hair 3.long hair 4.curly hair 5.straight hair 6.medium height 7.medium build 8.short straight hair 9.wear glasses 10.go to the movies IV.1-5 BEDCA Section B I.1.build 2.singer 3.Handsome 4.actor 5.round II.1.artist 2.actress 3.him 4.glasses 5.differently III.1.has 2.is 3.is 4.has 5.is 6.has IV.1-5 ACBAB Self Check 1 I.1-5 ACABB II.1.doesn’t do 2.Does;have 3.Who does;look 4.of medium height 5.in III.1-5 BCBCA 6-10 BACBA IV.1.round 2.light brown and short 3.thin 4.long curly 5.big blue Self Check 2 I.1.know 2.look 3.medium 4.bit 5.curly 6.glasses 7.good-looking 8.jokes 9.popular 10.remember II.A)1-5 CBCAB B）1.Susan.2.Because she has an important meeting.3.William.4.Tall.5.Yes, she does.III.One possible version:
My favorite teacher
My favorite teacher is my English teacher.She is Miss Li.She is thin and of medium height.She has long curly black hair.She wears glasses.She’s very good-looking.She likes singing and playing the guitar.She often teaches us to sing English songs.I like her very much.Unit 10 Section A I.1.large 2.drink 3.tomatoes 4.seasons 5.dumplings II.1-5 AABCB III.1.some;a 2.some;a 3.an 4.some 5.an;some IV.1.what kind of 2.beef and tomato noodles 3.a large bowl of noodles 4.What kind of;would;like 5.would he like;small/medium/large V.1.Can 2.help 3.some 4.noodles 5.do 6.have 7.do 8.have 9.large 10.medium 11.small 12.medium Section B I.1.tomatoes 2.to play 3.sunny 4.onion 5.eating II.1-5 CACCA III.1-5 CEBDA Self Check 1 I.1.orange juice 2.green tea 3.around the world 4.make a wish 5.blow out 6.cut up 7.take one’s order 8.a large bowl of 9.and 10.or 11.come;eat 12.small;medium;or large 13.some soup II.1-5 BACCA
Self Check 2 I.1.What kind of books 2.would like 3.large bowl 4.cups of 5.for breakfast II.1-5 ACBCA III.1-5 FFTFT
Unit 11 Section A I.1.farmers 2.walk 3.trip 4.grow 5.Cow II.1-5 BCABB III.1.go for a walk 2.milk a cow 3.ride a horse 4.feed chickens 5.take photos 6.in the countryside IV.1.played 2.visited 3.talked 4.climbed 5.studied 6.worried 7.stopped 8.practiced 9.did 10.was
11.were 12.had 13.ate 14.bought 15.rode 16.took
17.went 18.Fed V.was;was;visited;did;do;went;fed;was;was;was;was;watched;
were Section B I.1.climb the mountains 2.go fishing 3.visit the museum 4.fire station 5.all in all 6.be interested in 7.play chess 8.gift shop II.A)1.delicious 2.walk 3.classmate 4.water 5.expensive B)6.boring 7.took 8.were 9.interested 10.to make III.1-5 CDEAB
Self Check 1 I.1.didn’t make 2.Did;go 3.What did;do 4.Where did;go 5.went shopping II.1.did;go;the countryside 2.How;was great 3.Did;No 4.how to make 5.All in all;exciting III.1-5 ABCAC Self Check 2 I.1-5 CBAAC II.1.Last summer.2.Under a big tree.3.How did you get to the foot of the mountain? 4.How was the food? 5.We weren’t very happy.III.One possible version: Sunday, April 9th The weather was fine.All my classmates went to the park.We climbed the hills, boated on the lake, and flew kites all morning.At noon, we had a picnic near a big tree.In the afternoon, some girls sang and danced, some boys talked in English, and some students played games there.When we went home, it was late.I was tired, but I was really happy.Unit 12 Section A I.1.were;was 2.go;went 3.having 4.called;was;said 5.did;played II.1-5 CCBAA III.1.on Saturday morning 2.last weekend 3.do;homework 4.go boating 5.beautiful beach 6.clean one’s room 7.the library 8.the movies 9.the pool 10.play tennis 11.play badminton 12.play the guitar 13.study for 14.camp by the lake 15.great;OK;wasn’t 16.did;do;stayed;studied for the math test 17.On Saturday evening Section B I.A)1.week 2.visited 3.library 4.test 5.middle B)6.cleaned 7.had 8.wanted 9.was 10.went II.1-5 BAABA III.1.play the guitar 2.go to the library 3.study for the test 4.in the afternoon 5.fly a kite 6.swimming pool 7.clean the room 8.go shopping 9.have dinner with friends 10.put up tents 11.visit grandparents 12.stay up late 13.run off 14.get a surprise 15.up and down 16.wake sb up 17.shout to 18.So;that;move 19.put up tents;keep us warm 20.read a book about history Self Check 1 I.1.was 2.did 3.had 4.went 5.read 6.saw 7.flew 8.made 9.played 10.studied 11.swam 12.put II.1.She was at school two hours ago.2.He wasn’t a great singer in 1999.3.He（often）went to the mountains with his friends last month.4.I wrote a letter to my brother yesterday evening.5.He had a glass of milk this morning.III.1-5 BCACB Self Check 2 Ⅰ.1-5 CCCCB Ⅱ.1-5 CBACB 6-10 CAABB Ⅲ.One possible version:
Tom had a busy day last Sunday.He got up early in the morning.Then he did his homework.In the afternoon, he played soccer with his friends.In the evening, he studied for the English test for two hours.Then he watched TV for half an hour.He went to bed at ten thirty.
第五篇：初一数学练习册答案 七年级数学练习册答案 初一数学练习册 角测试题
角测试题
基础检测
一、选择：
1.下列关于角的说法正确的个数是()①角是由两条射线组成的图形;②角的边越长,角越大;③在角一边延长线上取一点D;④角可以看作由一条射线绕着它的端点旋转而形成的图形.A.1个 B.2个 C.3个 D.4个
2.下列4个图形中,能用∠1,∠AOB,∠O三种方法表示同一角的图形是()
BOA1CAO1DOBBBACO1A ABD
3.图中,小于平角的角有()A.5个 B.6个 C.7个 D.8个
二、填空：
BADC4.将一个周角分成360份,其中每一份是______°的角, 直角等于____°,平角等于______°.5.30.6°=_____°_____′=______′;30°6′=_____′=______°.三、解答题： 6.计算:(1)49°38′+66°22′;(2)180°-79°19′;
(2)22°16′×5;(4)182°36′÷4.7.根据下列语句画图:(1)画∠AOB=100°;(2)在∠AOB的内部画射线OC,使∠BOC=50°;(3)在∠AOB的外部画射线OD,使∠DOA=40°;(4)在射线OD上取E点,在射线OA上取F,使∠OEF=90°.8.任意画一个三角形,估计其中三个角的度数, 再用量角器检验你的估计是否准确.9.分别确定四个城市相应钟表上时针与分钟所成的角的度数.10.九点20分时,时钟上时钟与分钟的夹角a等于多少度?
拓展提高
11.马路上铺的地砖有很多种图案,如图所示的图案是某街面方砖铺设的示意图,请你用量角器量一下其中出现的所有的角度?
12.如图,在∠AOB的内部引一条射线OC,可得几个小于平角的角? 引两条射线OC、OD呢?引三条射线OC、OD、OE呢?若引十条射线一共会有多少个角?
AB
13.请用直线、线段、角等图形设计成表示客观事物的图画,如图, 并为你的图画命名.O一盏吊灯一帆风顺
角答案: 1.A 2.B 3.D 4.1,90,180 5.30,36,1836;1806,30.1 6.(1)116°;(2)100°41′;(3)111°20′;(4)45°39′.9.30°;0°;120°;90° 10.160°
12.引1条射线有2+1=3个角;引2条射线有3+2+1=6个角;引3条射线有4+3+2+1=10个角;引10条射线有11+10+9+……+3+2+1=66个角.
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