轻松快乐过寒假数学练习5一道数学题

轻松快乐的作文课
佳木斯杏林小学二年六班：宋诗琪
今天，老师上了一节新颖的作文课，是写硬币。老师把一元，五角和一角的硬币放在纸杯里，摇着纸杯让我们猜纸杯里是什么东西，大家有的说是钥匙，有的说是游戏币，还有的说是硬币。最后老师把纸杯里东西倒出来，原来是硬币。
我们观察了面额是五角的硬币，厚度大约是2毫米，直径大约是2厘米。图案正面中间有一个大大的“5”，“5”里面有几道横向条纹。左下角有一个用大写字母拼写的“五角”，右下角有一个小小的“角”字。“5”的上方有“中国人民银行”六个字，最下面是发行时间。我观察的这枚硬币，发行时间是2004年。硬币背面的中间有一朵大大的荷花，上面是大写字母“中国人民银行”的全拼。五角的硬币是金黄色的，硬币圆周侧面有六组条纹。
老师还带我们玩儿了猜币游戏，就是听声猜币值。我们先熟悉了一下硬币的声音，然后让我们闭上眼睛，老师分别丢出了一元、一角和五角的硬币，我们很快就猜出来了，因为一元的声音很沉重，一角的较轻，五角的则比一角的稍重些。老师满意地说：“你们猜对了！”
这节课让我感到了轻松、快乐，还了解了不少与硬币相关的知识呢！

I love you mother.就行了

Everyone is very relaxed and happy

have a good summer holiday

When the brain is relaxed and happy,he will give in to each organ signal that help keep the body healthy.

请收听腾讯微博@vickie786717863 我每天都在很努力的打答案,然后造福于人类.我先发一点吧.第一部分x09数学x09国标版x09x09x09x09x09
练习一x09x09x09x09x09x09x09
第一大题x09写得数x09横着x09x09x09x09x09
7分之2x093分之5x092分之3x095分之1x091x094x091x093分之1
第二大题x09判断x09x09x09x09x09x09
×x09×x09×x09×x09×x09x09x09
第三大题x09填空x09x09x09x09x09x09
6x095分之2x0935x098x09x09x09x09
24；1x0924x09x09x09x09x09x09
100x09x09x09x09x09x09x09
19；1x091；20x09x09x09x09x09x09
第四大题x09解决问题x09x09x09x09x09x09
解；设宽为x米,则长为3x米.x09x09x09x09x09x09x09
x＋3x=400÷2x09x09x09x09x09x09x09
4x=200x09x09x09x09x09x09x09
x=50x09x09x09x09x09x09x09
50×3=150(米)x09x09x09x09x09x09x09
答：长150米,宽50米.x09x09x09x09x09x09x09
应该是对的吧,要别的的话就收听一下微博,或者加Q786717863

瞎写就行了,开学你看老师什么时候检查过作业,再说了,老师也没空检查作业,不过,我也在到处找答案.答案倒是有,但是只有一点点,不过我觉得,只要本子上有字就行了.

P43完形填空
1.C 6.B
2.B 7.D
3.A 8.A
4.C 9.B
5.A 10.C
P46单项选择
1.C 8.D
2.D 9.C
3.B 10.D
4.B 11.C
5.D 12.C
6.C 13.A
7.C 14.A
P47阅读理解
1.A
2.D
3.C
4.C
5.B
P50阅读理解
1.A
2.D
3.B
4.D
5.A
P53单项选择
1.C 6.C
2.D 7.D
3.B 8.C
4.B 9.B
5.B 10.B
P54完形填空
1.B 6.B
2.D 7.D
3.C 8.A
4.C 9.B
5.A 10.C
P57阅读理解
1.B
2.D
3.C
4.D
5.D
P60完形填空
1.C 9.C
2.B 10.B
3.A 11.D
4.D 12.C
5.A 13.C
6.C 14.B
7.C 15.A
8.B

LZ说实话,问这种问题一般都要给分的.你不给分当然有人瞎捣乱了- -!
PS 下次至少给点分啦 答案你去谷歌等等别的浏览器搜 别只相信百度.

Sir,please don't be of that kind of heaviness.Why can't you be a litte happy?
It's my fault if you take me as some kind of burden.
I'm happy indeed,and somniloquous in my dream sometimes.So I hope you too feel well always.

ABDADBCADB

已发百度hi~
说实话这是我做的,和别人对过了,当然如果两个人都错了就没办法了,还有我只打选择,其他太麻烦了╮(╯_╰)╭

求人不如求己,加油!
更希望你出一份这样的答案 ,不但帮助了他人,这样做还会提高自己的学业成绩.何乐而不为?
望你三思!

练习一
present;since;doctor;pollution;open;D;A;B;A;C;B;B;AD;B;was taught;married;swim;came;have been;have lived;was.
练习二
changes;seen;in fact; marry; southern; had fun; won't until; have been married; has kept; different from
A A D B D A B B
练习三
possible;service;althgough;attraction;present;have;since;How many;When buy;Have carried;been;hasn't;sad;去掉but;yet;next to;has been opened;any longer;how to get;It's to read;It is came;but came;have known;are fond of
练习四
CBACCB；not arrived;yet;How long;heard;Has ever been;Has changed;yet;
I have lived here since I was born.
It's pleasant to play Chinese chess with my classmates.
Although Tom was ill,he went to school.
Where is Marry? She has gone to the cinema;
Have you been to Beijing?Yes I have.
I used to play computer games,now I don't do it.
练习五
a theme park;fast food;wave to us; get married;during the summer holiday;move at high speed;feel excited; the whole day; go sight-seeing;wait for an hour; stop taking photos; have gone to Shanghai; have been to Shanghai; on the second day;
careful;carefully;helpful;helpfully;hopeful;hopefully;wonderful;wonderfully;noisy;noisily;healthy;healthily;lucky;luckily;shiny;shinily;impolite;impossible;unkind;unpleasant;cheerless;harmful;different;present;cross;lovely;present;pleasant;of course;go back;performance;sailing;development;closing;education;feeling;discussing;meaning
练习六
have seen;saw;were doing;was helping ;do; was watching; knocking; were knocking; were making; didn't stop; to read; were dancing; not to take; were clapping; was marching;
The souvenirs are so expensive that I can't buy it.
He is rich enough to travel around the world
What were you doing when he arrived?
Daniel was swimming in the lake at noon yesterday;
useless;delightful;as;frightened;Italy;happily;meaning;exciting;screamed
练习七
outside;morning;called;office;suprised;tickets;because;cinema;themselves;taken;CBCADBACBD
练习八
has been away from Shanghai for two days.
can't stop taking photos with them because they look very cute.
have been in HongKong for a week
have gone to Hongkong twice
has gone to Hongkong
been away for two days
is quite different from that in Beijing
never forget the meaningful experience
did you come back from HongKong
arrived here the day before yesterday, I have been back for two days.
练习九
information;change;enjoy;screen;soon;short;repair;is designed by;e-dog for; wasn't evening;has been for; important;used ;to go;sold;more;libraries;made;will replace;pleasure;to buy
练习十
ABBBDCDA
funny;printer;designed;looking;written;correctly;educational;knowledge;passed;
at the same time; come out;send e-mails;get a point;order a set on the Internet;coulds with different colours;play a role;have a dream;many places of interest;be sold out;search for information;a remote control; word-processing;a ten-year-old boy; play a role of; fall asleep; be used widely; double-click on the icon;
What do you usually use the computer do
The computer is designed for students
Can I help you? I'd like to buy a personal computer
She will help you when necessary
练习十一
was left;is double-clicked;is produced;is put;to keep; BBBCA
练习十二
levels;character;uses;village;jump;goal;ask;knowledge;needs;designed;written;starting;has worked;is caught;are marked;typing;was broken;was lost;is made;is used;be clicked
下题 略
练习十三
searched for;wasn't found;so that can't take; was made to move; has taught for ;some photos was for;
The words he said sounded exciting;
This kind of newspaper comes out once a day.
I played a role of a English teacher in my dream.
The new educational CD-ROMs are sold out.
The CD-ROM can be used to test your English vocabulary.
reading;who;richest;about;how;have;on;take;interested;lesson;treasure;covered;set;vocabularies;producer.
练习十四
most exciting;months;donating;organization;duties;introducing;decision;was held;to organize;to come;called;
Why don't you join; chose he to be the host of the charity show; to work for the Project Hope; There is no time to wait ; at the right time; must practise more; seemed to happen so quickly; advertise on the Internet; make lots of noise; Spring Bud project
练习十五
because of the heavy rain;didn't start working; What was;How did Ricky feel in the charity show; It is fun to
注 A:because B because of
ABABABAB
BFAGD
练习十六
B 去掉a; C to; C success; C because of; A hope to
BBCBACAABC
练习十七
voluntary; international;rest; advertisement; education; kindness; operations; people; donations; collection
entrance;audience; seats;curtain;light; stage; microphone; performer; clapped; exit
cases of blindness; train the local doctors and nurses; a flying eye hospital; keep on working; be grateful to sb; perform operations; affect sixty per cent of students; have some pocket money left; be proud to dosth.; trat and cure eye problems; be able to buy the medicine; get education; raise money for charities; donate money to
练习十八
international charities; help poor people; take action to do sth.; mind others; be in hosipital; voluntary doctors; pocket money; organize events to raise money; set up UNICEF; spend money on
advertisement; operation; development; education; kindness; sickness; flying; teaching; organization; tratment;
BBADCCCBCCBCBADA
练习十九
BCADE;
charity; eye; cured; prevented; operated; operations; see; local; skills; knowledge; support
It was started on 11 September,1961
It works to save the earth and its environment
Volunteers and donations.
To stop air pollution,protect the earth forests and save all plants and animals.
In China,it works to save the panda from dying out. In South America, it works to save the Amazon Rainforest
ABCCA
练习二十
连线不太好发,省去吧
performing an operation; pocket money; operated on; medical tratment; used to; were grateful to; Is used to; a flying eye hospital; had a big lunch; cases of blindness;
too weak to; used to get; isn't used to; Did use to watch; used to be; is used; isn't cheap enough
BCDAC BCABA CCBCA
练习二十一
agreement; gladness; collection; illness; prevention; advertisement; development; decision; kindness; gentleness; sadness; sickness; education; organizagtion; improvement; usefulness; movement; happiness;
has cured illness; poor areas for medical tratment; is performing operation on ; proud have helped; you keep doing; grateful to because of donations; used to drink; Used to; have lived am used to; used to live; are used to living;
operating; attacks; patient; improving; blind;care; indeed; education; international; medical;
B be; C going; C blindness B not; A are; B drink
练习二十二
CBEADF
careless; the longest; itself; elderly; tree planting; unable; further; busier;
BBCBCCCBBD
练习二十三
join; tough; trail; aim; experience; happen; develop fund-raising
spirit; improve; excellent; violin; Februally; experience; especially; record;
singing; writing; is held ; join; to raise; has been built; to slove; was singing; called; playing;
去掉it; 去掉been; across----cross; finished---been over; because of; helping; drinks; drinking; bringing; but去掉
练习二十四
don't; will; It difficult to; more any other; How can help; will be recorded; with; For;without; on ; in; of; By; to
It's wrong to look down on poor people.
It is a good season for us to enjoy the beautiful view.
It's necessary to be careful when you cross the road.
Don't miss the chance you should help each other;
It's important for children to have support from parents.

英语 练习一（基础训练）第一题 1.D 2.H 3.E 4.F 5.I 6.A 7.J 8.C 9.B 10.G
第四题.1.B 2.C 3.A 4.D 5.B 6.C 7.B 8.D 9.C 10.C
练习二（能力提高） 第二题 1.to live 2.sitting 3.friendly 4.is putting 5.teacher's 6.countries 7.mine 8.to grow
练习七
五,dbcbddccdb
六,way ok along on drive how take by and
七,1,drives car to factory
2,i'm afaid
给点分吖
3,trying to
4,shall take
5,going to hold
6,straight see bright
7,the way to
8,going to rain take umbrella
9,who shall invite
10,are looking forward to visiting
练习八
二,badabdabbc
三,1,robbers
2,are planning
3,turning
4,seeing
5,foreighers
6,cheapest
7,surprised
8,will do
9,raing
10,doesn't eat
四,to way go along pass go by find you right
五,1,favourite football player above
2,straight on until traffic lights
3,surprised there wrong with work
4,wait to run towards
5,failed in
6,later more fine art
7,will take to
8,choose any like
练习一
一、SHEFIAJCBG
二、1、friendly
2、lying
3、twelfth
4、twenty
5、countries
6、dog's
7、has
8、child
9、wooden
10、busy
三、
1、my favourite place
2、more than ten rooms
3、share a bedroom with Amy
4、live on the fifth floor
5、can't wait to do ...
6、与……不同
7、在同一时间
8、至少
9、长的飞机旅行
10、烧饭
四、
BDADBCBDCC
五、
speak to
Who's
from
study
call number
tell
六、
1、about
2、of
3、with
4、near
5、near
6、to
7、After
8、to
七、（以下纯属乱写,请笑纳）
My dream home
My dream home is a very large house.The kitchen is beautiful and big.The gardenis so quiet and there are many flowers in it.The balcony is on the second floor.我有数学的,1到13的,请一定要追加奖分

设3月份用水x立方米 4月份用水（15-x）m³ 所得方程2*6+4*（x-6)+2*6+4*(15-x-6)=44所得方程无解 因此3月份用水少于6m³ 则方程为2*x+2*6+4*(15-x-6)=44 解得x=2 则4月份用水13m³ 3月份用水2m³

你可以到书店买一本答案.

练习一
一、填空题
60° 同位角相等,两直线平行
对顶角相等 1 2 a b 同位角相等,两直线平行
35°
50°
140°
80°
二、选择题
ABAAA
三、应用题
第一题略,过程太多懒得打字
2、∠DEF=125°
3、∠EGB=55°,∠HGQ=35°
第四题貌似有打印错误,我找不到∠1∠2在哪.
练习二
一、填空题
形状 面积 平行 相等
5 7 72
6 4 8
BD DC BC
BAE CAE BAC
AFC AFB
二、选择题
ABBD
三、应用题
1、三个,△ABD,△BCD,△ABC
2、51
3、(1)54＞BC＞30 (2)24＞BC＞6
4、∠1=114°,∠DBE=29°
这里第五题仍然有错误,最后一句话“的大小有没有发生变化”是指什么的大小?所以这题不做了
练习三
一、填空题
24
85°
40°
100° 140°
8
12
二、选择题
BDDBB
三、应用题
1、∠ADC=108°
2、∠ACB=110°
3、△BEF的面积=3
4、11边
第五题过程多.所以就略了
6、第一小题同上略,第二小题∠BAC+∠BHE=180°
练习四
一、选择题
DCCCD
二、计算题
-x^3
-1/64x^6y^12z^18
y^3
y^13
1.44×10^18
-(x-y)^3
三、应用题
1、可作5×10^12次运算.
2、十秒后体积是8×10^12.
3、(1)x=3 (2)x=3
4、(1)pq (2)p^2q^3
练习五
一、选择题
BDBBC
二、计算题
a^6b^3
9
-1/x^3
-(b-a)^4
三、应用题
1、是50倍
2、7/8
3、-(x+y)^6n+1
4、11
5、(1)x^2 (2)y=x^2+2
练习六
一、选择题
CDBBC
二、计算题
-4a^3-6a^2+2a
x^4y^2-x^3y^2
2x^3-11x^2-18x
6x-x^3
a^2-4b^2+12b-9
三、应用题
1、8
2、3xy^3-2
3、30
4、5a^2+13a+7
动脑筋(1)-11 (2)3x-0.5
练习七
一、选择题
ADCBB
二、计算题
-1/9a^2+b^2
-5x^2-12xy+10y^2
x^2-y^2+2yz-z^2
81x^4-1
x^4-16
三、应用题
1、1/10
2、x=6
3、这题没做出来.算了吧
4、a=-2 b=3
5、(1)1/5 (2)41/25
动脑筋 2^4n-1
练习八
一、选择题
DACAAA
二、计算题
-11x^2+31x-6
x^4-1/16y^4
2x^4-2x^2y^2
三、分解因式
3(x-y)(x-2y)
(4b-4c+a)(4b-4c-a)
(x+2)^2(x-2)^2
(a+b-3)^2
(a-2+b)(a-2-b)
(x+y+1/2)(x+y-1/2)
四、a=1
动脑筋 -2/3

2010-7-11 18:22 回复

水2345
11位粉丝
2楼
练习九
一、选择题
ABCBB
二、填空题
-3
3 1
3 2
2 -3
2
三、解下列方程
x=1 y=1
x=0 y=100
四、应用题
1、k=1
2、x=-4 y=4
3、a+2b=3
4、k=3
动脑筋k=-4
练习十
一、选择题
BAC
二、解下列方程
x=1 y=1
x=1 y=-2
x=4 y=-2
x=3 y=0
三、应用题
1、80分的买了8张,40分的买了7张
2、(1)x=-1 y=1 (2)第一竖排(从上到下)：-2、5、0；接着是3、1、-1；最后一个空是4
3、第一种400元,第二种480元
4、胜了9场
5、不能承受
6、这个数是16

练习十一
一、选择题
BDCA
二、填空题
BC和DE,AC和AE ∠B和∠ADE,∠BAC和∠DAE
10cm^2 18cm
2
12 8 12
120
2
三、解答题
1、对应角：∠B和∠C,∠AEC和∠ADB,∠DAB和∠CAE,∠B和∠C,∠CBO和∠BEO,∠DOC和∠EOB
对应边:AB和AC,BD和CE,AD和AE,OB和OC,BE和CD,OE和OD
2、∠CAE=45°,∠E=105°,∠BAE=120°
第三题过程码字麻烦,略.
第四题同上略.
第五题第一小题略,第二小题∠EGC=85°

2010-7-11 18:28 回复

水2345
11位粉丝
4楼
练习十二
一、选择题
DCBBA
二、填空题
∠B=∠E
5
80°
△ABF 互相垂直且相等
5cm
三、应用题
第一题略.
第二题同上
第三题同上
4、∠DFB=90° ∠DGB=60°
第五题略~~
练习十四
一、选择题
DDCBA
二、填空题
不可能
随机
1/6 1/2 1
三、应用题
1、(1)0.68 0.74 0.68 0.69 0.705 0.701 (2)画图略 (3)接近0.7 成功率70%
2、(1)红球黑球各4个 (2)红球黑球各3个,白球2个 (3)红球黑球白球黄球各2个
练习十五
一、选择题
BABBBABACB
二、填空题
2×10^-4
±1
-1
-3
5
3:4:5
70°
120
三、解答题
1、计算
-6
-x^2-x+8
2、因式分解
2(a+b)(x-1)
(x+y)^2(x-y)2
(a+b)(a+b-4)
(x-2)^2
3、4xy=3 x^2+y^2=6.5
4、a+2b=3
第五题略
6、基本价1.6元/立方米,加价后5元/立方米
7、面积是76平方米
第八题略
9、(1)100 (2)从左往右是50 0.10 (3)15.5~20.5 (4)略
10、不公平.规则改为：两个骰子同时掷,若掷出的两个点数之和为奇数,则小勇赢,若为偶数,则算小燕赢.
我英语也做完了,本来想发上来,可英语实在是太多了,没时间看雷顿电影版了,所以我先去看雷顿去了

练习十三
一、填空题
普查 抽查
一批冰箱的冷冻效果 每台冰箱的冷冻效果 30台冰箱的冷冻效果 30
36°
30
二、选择题
CBCCB
三、解答题
1、总体：某地10000名学生的数学考试成绩
个体：每个学生的数学考试成绩
样本:300份试卷的数学考试成绩
样本容量：300
2、(1)频数列从上往下：6 14 50 频率列从上往下：0.28 1 (2)50名学生的成绩 (3)80.5~90.5最多 (4)约为1800人

2010-7-11 18:54 回复

水2345
11位粉丝
8楼
练习十三
一、填空题
普查 抽查
一批冰箱的冷冻效果 每台冰箱的冷冻效果 30台冰箱的冷冻效果 30
36°
30
二、选择题
CBCCB
三、解答题
1、总体：某地10000名学生的数学考试成绩
个体：每个学生的数学考试成绩
样本:300份试卷的数学考试成绩
样本容量：300
2、(1)频数列从上往下：6 14 50 频率列从上往下：0.28 1 (2)50名学生的成绩 (3)80.5~90.5最多 (4)约为1800人

2010-7-11 18:54 回复

水2345
11位粉丝
9楼
练习十二
一、选择题
DCBBA
二、填空题
∠B=∠E
5
80°
△ABF 互相垂直且相等
5cm
三、应用题
第一题略.
第二题同上
第三题同上
4、∠DFB=90° ∠DGB=60°
第五题略~~
练习十三
一、填空题
普查 抽查
一批冰箱的冷冻效果 每台冰箱的冷冻效果 30台冰箱的冷冻效果 30
36°
30
二、选择题
CBCCB
三、解答题
1、总体：某地10000名学生的数学考试成绩
个体：每个学生的数学考试成绩
样本:300份试卷的数学考试成绩
样本容量：300
2、(1)频数列从上往下：6 14 50 频率列从上往下：0.28 1 (2)50名学生的成绩 (3)80.5~90.5最多 (4)约为1800人
练习十二
一、选择题
DCBBA
二、填空题
∠B=∠E
5
80°
△ABF 互相垂直且相等
5cm
三、应用题
第一题略.
第二题同上
第三题同上
4、∠DFB=90° ∠DGB=60°
第五题略~~
练习十三
一、填空题
普查 抽查
一批冰箱的冷冻效果 每台冰箱的冷冻效果 30台冰箱的冷冻效果 30
36°
30
二、选择题
CBCCB
三、解答题
1、总体：某地10000名学生的数学考试成绩
个体：每个学生的数学考试成绩
样本:300份试卷的数学考试成绩
样本容量：300
2、(1)频数列从上往下：6 14 50 频率列从上往下：0.28 1 (2)50名学生的成绩 (3)80.5~90.5最多 (4)约为1800人
练习十四
一、选择题
DDCBA
二、填空题
不可能
随机
1/6 1/2 1
三、应用题
1、(1)0.68 0.74 0.68 0.69 0.705 0.701 (2)画图略 (3)接近0.7 成功率70%
2、(1)红球黑球各4个 (2)红球黑球各3个,白球2个 (3)红球黑球白球黄球各2个
练习十五
一、选择题
BABBBABACB
二、填空题
2×10^-4
±1
-1
-3
5
3:4:5
70°
120
三、解答题
1、计算
-6
-x^2-x+8
2、因式分解
2(a+b)(x-1)
(x+y)^2(x-y)2
(a+b)(a+b-4)
(x-2)^2
3、4xy=3 x^2+y^2=6.5
4、a+2b=3
第五题略
6、基本价1.6元/立方米,加价后5元/立方米
7、面积是76平方米
第八题略
9、(1)100 (2)从左往右是50 0.10 (3)15.5~20.5 (4)略
10、不公平.规则改为：两个骰子同时掷,若掷出的两个点数之和为奇数,则小勇赢,若为偶数,则算小燕赢.
我英语也做完了,本来想发上来,可英语实在是太多了,没时间看雷顿电影版了,所以我先去看雷顿去了

好像是＜这样做男孩最成功＞

我只有数学
练习一
BAABA B
=-0.5 =0.5
a-b -2 a^3-a^2b
19:13
60x^2 y^2
Y=x - a分之3
练习二
DCCDA
12
3.068×10^7
-3.48×10^-5
2
10
3 7
练习三
X≥1且≠2
(-1,2)
Y=12+2x
-2＜x＜-0.5
三
DCCCA
练习四
BBCCA A
y=x+5
-2
4
3
练习五
BDCBA
反 正
-5
5
-2＜x＜0 和 x＞1
y= -x分之1
练习六
CCDAD
BF=CF ∠B=∠C
3
120°
8cm
36°
练习七
ADCBB
∠ABC=∠DCB
3 △DCF≌△BAE △CFO△≌EAO △CDO≌△ABO
根号2
90°
AD 45°
练习八
CCCDB
对角线相等
对角线互相垂直
对角线互相垂直且相等
AD BC
平行四边形
AB=CD
练习九
CCABB
互相垂直平分 互相垂直 相等
正方 正方
AF=FD
练习十
90° 18° 252°
16 15.5
略
6 12 40
20 20% 71～80
CAACA
练习十一
2.83
7
2(x平均数) S^2
4.4
7 7 3 1.2 乙
BBCDD
练习十二
≠±1 2
-x^5 y分之1
（-1,6）
Y=-x分之1
x≥3且x≠-0.5
＞2 三
m＜3分之2
95°
10
12
3.16
10
67.5°
DBDBD BCCCB
练习十三
x^2 -4分之x^2+4x+9
2
-5
-7
Y=6x-2
二四 增大
1＜m＜2
有两个锐角互余的三角形是直角三角形 真
8
8
圆心角
6
6
AB=AC
ACDAB BB
练习十四
2
3.1×10^-4 4.56×10^4
(-2分之3,2分之5 )
根号2
-a分之2b
X=2
根号2
107°
∠B=∠E
30cm
3
CDDAB DDC
练习十五
＞-2
x+y分之x^2 +y^2
85
-6
-3分之4 3分之5
m＜0.5
减小
3
26cm
40°
ADBAC CCCDC
练习十六
ACCCB 1或1.5
3分之5或 -1
-1或2
1 (-4)
2x^2 +5x+2 …….

.（默默捂脸..）好久没上了.回复的可能有点晚...可是呢.其实我已经升初一了.sorry,楼主酱~~不过相信你已经不需要了~

I don't mind having P.E.Though it's tiring,I sometimes feel relaxed and happy.
I like having English class even though I am not good at it.I want to improve the grades as soon as possible.

一、选择题
1.C 2.A 3.C 4.C 5.A 6.A 7.C 8.C 9.B 10.A
二、填空题
11.甲 省距离 12.把砖块前移 减小阻力臂 13.09 不能 14.30N 5W
15.80% 1800J 16.80% 20
（这个大家就自己作一下把,貌似我不会复制.）
20.甲：省力但费距离 乙：省距离但费力
21.（1）71 0.6 0.7 （2）B （3）A （4）物重
22.（1）96W（2）91.67%（3）96.15%
23.(1)C(2)如右图所示(3)95.23%
24.(1)100N (2) 500N (3) 800N
一、选择题
1.C 2.B 3.B 4.C 5.C 6.D 7.C 8.D 9.C 10.C 11.B 12.D 13.B 14.C
二、填空题
15.0 30 16.重力势 动 弹性势 17.1：6 6：1 18.100 热值大 污染小
19.热量 比热容 20.内 机械 减小 降低 21.弹性势能 动 22.热传递 转移
做功 转化 23.> < 24.40 25.3.2×103J/(kg·℃)
三、实验题
26.白汽 做功 内 机械 液化
27.（1）大（2）增大 内（3）减小 增加（4）机械 内
28.Ⅰ 热牛奶和水温相同的温度 6.3×104J
四、计算题
29.(1)1.05×105J（2）3×105J(3)酒精不一定能完全燃烧,酒精产生的热量不能被水完全吸收
30.200kg 31.（1）14000s （2）0.93kg
一、填空题
1.其他形式 电 电 化学 2.并 串 3.短路 断路 通路 4.短 断 5.S2 S1 S3 S2、S1、S3 6.不工作 灯泡发光 并 7.红 绿 8.4 0 不能 6 9.化学 电 串
10.（1）电压 电流 电压（2）0.8 1.5
二、选择题
11.B 12.C 13.C 14.B 15.C 16.C 17.C 18.D 19.D
20.（1）如右图所示（2）0.28 1.4 （3）L2断路
21.（1）如下图所示（2）L1两端电压U1和L2两端电压U2（3）U1 +U2
22.(1)L1的左边接线柱和L2的右边接线柱相连 (2)开关右边接电压表的线打“×”,把开关右边接线柱接到L2右边
一、选择题
1.A 2.D 3.A 4.B 5.B 6.D 7.B 8.C 9.D 10.B
二、填空题
11.60 0.05 60 12.0.1 40 13.变大 变大 14.串 60 15.5 0.6 16.12 24 6
17.1 0.24
三、实验与探究题
18.（1）研究导体中的电流与导体两端电压的关系
（2）大于 右 手移动滑动变阻器的滑片,眼睛观察电压表的示数
（3）滑动变阻器的滑片位于最左端,相当于导线（或电阻R接线柱松动等）
19.（1）减小 （2）40
20.（1）甲 （2）电池的节数 （3）丙
四、计算题
21.（1）半导体 因为当电压变大时,导体的温度升高,导体的电阻在逐渐减小
（2）1Ω.
22.当S断开,把滑片P滑至b端时,R2与R1串联,I1=I2=0.2A R1=20Ω
U1=I1R1=0.2A×20Ω=4V
U2=U-U1=6V-4V=2V
R2=U2/I2=2V/0.2A =10Ω
当S闭合,把滑片P滑至a端时,R2与L并联,UL=U2’=6V
I2’=U2’/R2=6V/10Ω=0.6A
IL=I-I2’=0.4A
RL=UL/IL=15Ω

2011八年级 轻松快乐过暑假数学选择题答案
练习1 AADAC 练习2 CDAAD 练习3 CBBCD 练习4 BAABA 练习5 BDDBC 练习6 CBCDB 练习7 BCBAB 练习8 AADCB 练习9 AAACD 练习10 BCADB 练习11 DBCDD 练习12 CDACDBCB 练习13 DCCABABA 练习14 BCDBCAAB
填空题
练习1 6.X<3 7.X>3 8.0,1,2 9.K<-1/2(-2分之1) 10.P>-6
练习2 6.1 7.K<2 8.3,2,1,0 9.M<=2(大于等于) 10.10
练习3 6.Y/X-2(X-2分之Y) 7.2 8.X>3 9.7/10 10.-3/5
练习4 6.-1/5 7.2/3 8.1/a 9.2,1 10.2/3
练习5 6.y=-3/x 7.-3 8.m<1 9.y=90/x 10.c练习6 6.1 7.y=-12/x+1 8.y=8/x,16/3 9.1/3<=y<=2 10.4
练习7 6.1:2,根号3:1,1:2 7.2:根号5 8.27 9.4 10.2/3

A B C

　　练习一
　　1. 2
　　2. 96
　　3. 13
　　4. 4
　　5. 7 9 特殊矩形方阵
　　11 176
　　6. 12元
　　7. 123cm
　　8. 16
　　9. 12本 ,23本
　　10. 49/100
　　练习二
　　1. D
　　2. D
　　3. D
　　4. D
　　5. D
　　6. C
　　7. C
　　8. D
　　9. -2
　　10. 1/2
　　11. 5.1×10^8
　　12. 5
　　13. 2/25
　　14. 1/4 =
　　15. -8/8
　　16. 1/6
　　17. 111/10
　　18. -3/10
　　19. 1
　　20. 10/21
　　21. ①.全8座 5辆 ②全4座 9辆 ③1个4座其余8座 得一个4座 4个8座
　　7个4座 1个8座 7*200+1*300=1700 答：1700元 7个4座 1个8座
　　练习三
　　1. A
　　2. D
　　3. A
　　4. A
　　5. B
　　6. C
　　7. B
　　8. D
　　9. A
　　10. A
　　11. （2a）²
　　12. 6x-y y+z
　　13. 5m-4
　　14. 2/3
　　15. 1/9
　　16. 6或5
　　17. 4xy²-xy+8y² -11x-8xy-17y²
　　18. 18a-18b-2
　　19. 25
　　20. -14 -11 -5 -2 4 16
　　0 0.2 0.6 0.8 1.2 2
　　练习四
　　1. C
　　2. C
　　3. C
　　4. C
　　5. A
　　6. C
　　7. D
　　8. A
　　9. 2
　　10. 1/3
　　11. 5
　　12. 1.2
　　13. 8.4
　　14. 180 ,240, 480
　　15. -5/9
　　16. -12
　　17. -12/7
　　18. K=5/3 X= -29/5
　　19. 甲16个/h 乙14个/h
　　20. K=0.6 K=2/3
　　练习五
　　1. D
　　2. D
　　3. C
　　4. A
　　5. B
　　6. D
　　7. B
　　8. D
　　9. 略 4 11
　　10. 9 6 5 6 4 4
　　11. 18
　　12. 圆锥
　　13. 2
　　6
　　5
　　14. 略
　　15. 6 9 5 8 12 6 8 13 7 10 15 7
　　16. z+x-2=y
　　练习六
　　1. D
　　2. C
　　3. B
　　4. B
　　5. B
　　6. B
　　7. D
　　8. 34 22 12 36 177/600 25°5′16〃
　　9. 60°
　　10. 3
　　11. 75
　　12. 5
　　13. 45
　　14. 平行,因为平行于同一平面的平行线互相平行.
　　15. BM=2CM MN=5CM
　　16. 40° 120° 120°
　　17. 略
　　18. （1）FOE DOB (2)AOD FOB EOC
　　19. 略 90°
　　练习七
　　1. D
　　2. B
　　3. C
　　4. D
　　5. B
　　6. C
　　7. 2.7
　　8. 3a-2b
　　9. a三次方+b²/2
　　10. 0
　　11. 25
　　12. 90 45
　　13. 10
　　14. 60 30
　　15. -8
　　16. 2 1
　　17. S=a²+b²-[1/2(a+b)b+1/2a²] 32.5cm2
　　18. 6KM/h
　　19. 7 2.5
　　20. 13 2a-b
　　21. 有 740元 一班45人 二班58人
　　练习八
　　1. C
　　2. C
　　3. B
　　4. D
　　5. A
　　6. A
　　7. C
　　8. D
　　9. 1/5 -2
　　10. 2
　　11. 圆锥
　　12. 7
　　13. 40
　　14. 12
　　15. 7
　　16. 3 45
　　17. 17 168
　　18. -7 3.5
　　19. 45
　　20. 34
　　21. 7 127/144 相等 507
　　22. 书包92元 随身听 360元
　　23. 时代超市
　　24. 1 -2 -20
　　25. 60° 小题略

P1(1)藤萝之美,藤萝茂盛（2）突出藤萝之美和生机勃勃（3)享受藤萝之美；因为藤萝被毁而伤心
P2（1）细如蚊蝇（2）比喻,拟人
P4 (三)2.A（四）2 父亲年老体衰；父亲身躯肥胖
P7四2.D
P8练习三1.D
P92.(1)C 3.D
P16 二1.鹏程万里,风卷残云,任重道远,沧海一粟,秀外慧中,甘之如[食台],大智若愚
2.勾践,项羽,江淹,嵇康,嵇绍,刘禅,匡衡,赵高,赵括,岳飞,祖DI,诸葛亮,荆柯,景皓
P21-22 四.BBACBBBCBDCD
数学
练习一
一.1.3 2.40度 3.7,7或8,6 4.75/8或25/4 5.50,50,130 6.6
二.BABB 三.12.70度 13.6cm
练习二
一.BCCBBCABABCB
二.13.±8,-3 14.12,-0.2 15.3,3/4 16.大于,小于 17.1/2 18.12又根号5/5 19.6
三.20.3 21.根号5-根号2 22.8 23.16又根号2+24 24.能 25.三次根号250
练习三
一.DBDAA
二.6.10cm 7.90 8.30cm方
三.11(2)16又根号3 12.80,100,80,100
练习四
一.表格,图形,(2,3),4,3,2,(4,-4)
二.CCBACB
(后面待续)
英语
练习一
三.EDBCA
四.BDDBDCCBAC
五.CDABADDBCA
六.AAAABD
练习二
四.BDDCCBBADAC
五.DBABCBDBCD
六.BBDDC
(后面待续)
物理
练习一 11-19 BBCABDBA
练习二 13-18DDCACD
练习四 1-9会聚 折射 乙 成放大的像 物距 像距 凸 后 浅 水中 空气 折射 凸会聚 D A

（1）10+8-5=13（人）
答：参加田径和篮球的共13人.
（2）答：最少需10人.（不需要列算式）
8-5=3（人）10-5=5（人）3+5=8（人）10+8=18(人)
答：最多需18人.

不是吹,数学、化学用心学,很有意思的!就自个好好做吧,不过可以的话,可以探讨探讨的呵!最后寒假HAPPY

分别是 Paopao Mate Wudaokou Shop
is coming to start business
inside conduction
waiting for you

你可以去问写好的人拿.本人也是7年级的

心理见习生初学的办法:
其实很多人会有失眠，心情低落，寂寞，伤心等心理情况，都可以采用下边的方法从根本上解决问题，先调节好心理，你的精神才会好起来，才会睡一个很好的觉呢，下边就是我要说的：
1:心情不好的话,可以转移话题,或者做其他事情,就好象是听音乐,看电视,外出活动(跑步、散步、打球)等,这样可以分散自己的注意力,使不好的心情有所缓解
2:把你不开心的事告诉朋友,亲人...

climb ；could；pretty；unhappy

要答案多不好 动动老 行不 不然没意思

手上没题目,也不知道从何下手,建议最好附上需要解决的题目,人家才好解决

练习一
present;since;doctor;pollution;open;D;A;B;A;C;B;B;AD;B;was taught;married;swim;came;have been;have lived;was.
练习二
changes;seen;in fact; marry; southern; had fun; won't until; have been married; has kept; different from
A A D B D A B B
练习三
possible;service;althgough;attraction;present;have;since;How many;When buy;Have carried;been;hasn't;sad;去掉but;yet;next to;has been opened;any longer;how to get;It's to read;It is came;but came;have known;are fond of
练习四
CBACCB；not arrived;yet;How long;heard;Has ever been;Has changed;yet;
I have lived here since I was born.
It's pleasant to play Chinese chess with my classmates.
Although Tom was ill,he went to school.
Where is Marry? She has gone to the cinema;
Have you been to Beijing?Yes I have.
I used to play computer games,now I don't do it.
练习五
a theme park;fast food;wave to us; get married;during the summer holiday;move at high speed;feel excited; the whole day; go sight-seeing;wait for an hour; stop taking photos; have gone to Shanghai; have been to Shanghai; on the second day;
careful;carefully;helpful;helpfully;hopeful;hopefully;wonderful;wonderfully;noisy;noisily;healthy;healthily;lucky;luckily;shiny;shinily;impolite;impossible;unkind;unpleasant;cheerless;harmful;different;present;cross;lovely;present;pleasant;of course;go back;performance;sailing;development;closing;education;feeling;discussing;meaning
练习六
have seen;saw;were doing;was helping ;do; was watching; knocking; were knocking; were making; didn't stop; to read; were dancing; not to take; were clapping; was marching;
The souvenirs are so expensive that I can't buy it.
He is rich enough to travel around the world
What were you doing when he arrived?
Daniel was swimming in the lake at noon yesterday;
useless;delightful;as;frightened;Italy;happily;meaning;exciting;screamed
练习七
outside;morning;called;office;suprised;tickets;because;cinema;themselves;taken;CBCADBACBD
练习八
has been away from Shanghai for two days.
can't stop taking photos with them because they look very cute.
have been in HongKong for a week
have gone to Hongkong twice
has gone to Hongkong
been away for two days
is quite different from that in Beijing
never forget the meaningful experience
did you come back from HongKong
arrived here the day before yesterday, I have been back for two days.
练习九
information;change;enjoy;screen;soon;short;repair;is designed by;e-dog for; wasn't evening;has been for; important;used ;to go;sold;more;libraries;made;will replace;pleasure;to buy
练习十
ABBBDCDA
funny;printer;designed;looking;written;correctly;educational;knowledge;passed;
at the same time; come out;send e-mails;get a point;order a set on the Internet;coulds with different colours;play a role;have a dream;many places of interest;be sold out;search for information;a remote control; word-processing;a ten-year-old boy; play a role of; fall asleep; be used widely; double-click on the icon;What do you usually use the computer do
The computer is designed for students
Can I help you? I'd like to buy a personal computer
She will help you when necessary
练习十一
was left;is double-clicked;is produced;is put;to keep; BBBCA
练习十二
levels;character;uses;village;jump;goal;ask;knowledge;needs;designed;written;starting;has worked;is caught;are marked;typing;was broken;was lost;is made;is used;be clicked
下题 略
练习十三
searched for;wasn't found;so that can't take; was made to move; has taught for ;some photos was for;
The words he said sounded exciting;
This kind of newspaper comes out once a day.
I played a role of a English teacher in my dream.
The new educational CD-ROMs are sold out.
The CD-ROM can be used to test your English vocabulary.
reading;who;richest;about;how;have;on;take;interested;lesson;treasure;covered;set;vocabularies;producer.
练习十四
most exciting;months;donating;organization;duties;introducing;decision;was held;to organize;to come;called;
Why don't you join; chose he to be the host of the charity show; to work for the Project Hope; There is no time to wait ; at the right time; must practise more; seemed to happen so quickly; advertise on the Internet; make lots of noise; Spring Bud project
练习十五
because of the heavy rain;didn't start working; What was;How did Ricky feel in the charity show; It is fun to
注 A:because B because of
ABABABAB
BFAGD
练习十六
B 去掉a; C to; C success; C because of; A hope to
BBCBACAABC
练习十七
voluntary; international;rest; advertisement; education; kindness; operations; people; donations; collection
entrance;audience; seats;curtain;light; stage; microphone; performer; clapped; exit
cases of blindness; train the local doctors and nurses; a flying eye hospital; keep on working; be grateful to sb; perform operations; affect sixty per cent of students; have some pocket money left; be proud to dosth.; trat and cure eye problems; be able to buy the medicine; get education; raise money for charities; donate money to
练习十八
international charities; help poor people; take action to do sth.; mind others; be in hosipital; voluntary doctors; pocket money; organize events to raise money; set up UNICEF; spend money on
advertisement; operation; development; education; kindness; sickness; flying; teaching; organization; tratment;
BBADCCCBCCBCBADA
练习十九
BCADE;
charity; eye; cured; prevented; operated; operations; see; local; skills; knowledge; support
It was started on 11 September,1961
It works to save the earth and its environment
Volunteers and donations.
To stop air pollution,protect the earth forests and save all plants and animals.
In China,it works to save the panda from dying out. In South America, it works to save the Amazon Rainforest
ABCCA
练习二十
连线不太好发,省去吧
performing an operation; pocket money; operated on; medical tratment; used to; were grateful to; Is used to; a flying eye hospital; had a big lunch; cases of blindness;
too weak to; used to get; isn't used to; Did use to watch; used to be; is used; isn't cheap enough
BCDAC BCABA CCBCA
练习二十一
agreement; gladness; collection; illness; prevention; advertisement; development; decision; kindness; gentleness; sadness; sickness; education; organizagtion; improvement; usefulness; movement; happiness;
has cured illness; poor areas for medical tratment; is performing operation on ; proud have helped; you keep doing; grateful to because of donations; used to drink; Used to; have lived am used to; used to live; are used to living;
operating; attacks; patient; improving; blind;care; indeed; education; international; medical;
B be; C going; C blindness B not; A are; B drink
练习二十二
CBEADF
careless; the longest; itself; elderly; tree planting; unable; further; busier;
BBCBCCCBBD
练习二十三
join; tough; trail; aim; experience; happen; develop fund-raising
spirit; improve; excellent; violin; Februally; experience; especially; record;
singing; writing; is held ; join; to raise; has been built; to slove; was singing; called; playing;
去掉it; 去掉been; across----cross; finished---been over; because of; helping; drinks; drinking; bringing; but去掉
练习二十四
don't; will; It difficult to; more any other; How can help; will be recorded; with; For;without; on ; in; of; By; to
It's wrong to look down on poor people.
It is a good season for us to enjoy the beautiful view.
It's necessary to be careful when you cross the road.
Don't miss the chance you should help each other;
It's important for children to have support from parents
互帮互助

When I am stressed out, I always listen to music to relax myself. I like music that is quiet and gentle,
so my favorite music is country music, which is great. It has great lyrics. My favorite singer is John
Denver who can sing the words clearly. You can listen to his music at night with your bedroom tight on.
He is moody, I think, his music reminds me of love.
答案不唯一

练习一,第—大题,会话配对DHBFIEJCAG.
第四大题,单项选择DCADBABDCB.
练习三,第二大题,完形填空CABDACDDDC.
练习五,第一大题,会话配对DAFHGIJECB.
好了,就这些,下面自己动脑吧

语文
P1 C
P3 C
P21 A ,A
P23 C,A,C,C,B
P24 A,A,C,C,B,B C
数学
练习二：D,B,D,D,D,D,C,C
练习三：A,D,A,A,A,C,B,A,B,A
练习四：C,A,A,D,C,C,B,A
练习五：D,D,C,A,D,D,B,D
练习六:C,C,B,D,A,D,D
练习七：D,B,D,D,B,C
P49 CBDCD
P50 ABDBA
P51 C,B,B,A,D,C,C,B,A,B
P54-55 七 B,C,C,B,D,C,C,D,C,D,C,D,A,A
P61 C,D,B,B,B,C,D,C,B,A
P62 A,C,A,C,C,A,B,D,C,B
P65-66 七 B,D,C,D,D
P66-67 一 C,A,B,D,B,B,C,B,C,A,B,C
P68 C,B,A,D,A,C,C,B,C,B,D,C,C,B,A
P68-69三 A,B,D
P69 A,D,B,C

具体题目

练习一
一、填空题
60° 同位角相等,两直线平行
对顶角相等 1 2 a b 同位角相等,两直线平行
35°
50°
140°
80°
二、选择题
ABAAA
三、应用题
第一题略,过程太多懒得打字
2、∠DEF=125°
3、∠EGB=55°,∠HGQ=35°
第四题貌似有打印错误,我找不到∠1∠2在哪.
练习二
一、填空题
形状 面积 平行 相等
5 7 72
6 4 8
BD DC BC
BAE CAE BAC
AFC AFB
二、选择题
ABBD
三、应用题
1、三个,△ABD,△BCD,△ABC
2、51
3、(1)54＞BC＞30 (2)24＞BC＞6
4、∠1=114°,∠DBE=29°
这里第五题仍然有错误,最后一句话“的大小有没有发生变化”是指什么的大小?所以这题不做了
练习三
一、填空题
24
85°
40°
100° 140°
8
12
二、选择题
BDDBB
三、应用题
1、∠ADC=108°
2、∠ACB=110°
3、△BEF的面积=3
4、11边
第五题过程多.所以就略了
6、第一小题同上略,第二小题∠BAC+∠BHE=180°
练习四
一、选择题
DCCCD
二、计算题
-x^3
-1/64x^6y^12z^18
y^3
y^13
1.44×10^18
-(x-y)^3
三、应用题
1、可作5×10^12次运算.
2、十秒后体积是8×10^12.
3、(1)x=3 (2)x=3
4、(1)pq (2)p^2q^3
练习五
一、选择题
BDBBC
二、计算题
a^6b^3
9
-1/x^3
-(b-a)^4
三、应用题
1、是50倍
2、7/8
3、-(x+y)^6n+1
4、11
5、(1)x^2 (2)y=x^2+2
练习六
一、选择题
CDBBC
二、计算题
-4a^3-6a^2+2a
x^4y^2-x^3y^2
2x^3-11x^2-18x
6x-x^3
a^2-4b^2+12b-9
三、应用题
1、8
2、3xy^3-2
3、30
4、5a^2+13a+7
动脑筋(1)-11 (2)3x-0.5
练习七
一、选择题
ADCBB
二、计算题
-1/9a^2+b^2
-5x^2-12xy+10y^2
x^2-y^2+2yz-z^2
81x^4-1
x^4-16
三、应用题
1、1/10
2、x=6
3、根号3
4、a=-2 b=3
5、(1)1/5 (2)41/25
动脑筋 2^4n-1
练习八
一、选择题
DACAAA
二、计算题
-11x^2+31x-6
x^4-1/16y^4
2x^4-2x^2y^2
三、分解因式
3(x-y)(x-2y)
(4b-4c+a)(4b-4c-a)
(x+2)^2(x-2)^2
(a+b-3)^2
(a-2+b)(a-2-b)
(x+y+1/2)(x+y-1/2)
四、a=1
动脑筋 -2/3

练习九
一、选择题
ABCBB
二、填空题
-3
3 1
3 2
2 -3
2
三、解下列方程
x=1 y=1
x=0 y=100
四、应用题
1、k=1
2、x=-4 y=4
3、a+2b=3
4、k=3
动脑筋k=-4
练习十
一、选择题
BAC
二、解下列方程
x=1 y=1
x=1 y=-2
x=4 y=-2
x=3 y=0
三、应用题
1、80分的买了8张,40分的买了7张
2、(1)x=-1 y=1 (2)第一竖排(从上到下)：-2、5、0；接着是3、1、-1；最后一个空是4
3、第一种400元,第二种480元
4、胜了9场
5、不能承受
6、这个数是16

练习十一
一、选择题
BDCA
二、填空题
BC和DE,AC和AE ∠B和∠ADE,∠BAC和∠DAE
10cm^2 18cm
2
12 8 12
120
2
三、解答题
1、对应角：∠B和∠C,∠AEC和∠ADB,∠DAB和∠CAE,∠B和∠C,∠CBO和∠BEO,∠DOC和∠EOB
对应边:AB和AC,BD和CE,AD和AE,OB和OC,BE和CD,OE和OD
2、∠CAE=45°,∠E=105°,∠BAE=120°
第三题略
第四题略.
第五题第一小题略,第二小题∠EGC=85°
练习十二
一、选择题
DCBBA
二、填空题
∠B=∠E
5
80°
△ABF 互相垂直且相等
5cm
三、应用题
第一题略.
第二题同上
第三题同上
4、∠DFB=90° ∠DGB=60°
第五题略
练习十三
一、填空题
普查 抽查
一批冰箱的冷冻效果 每台冰箱的冷冻效果 30台冰箱的冷冻效果 30
36°
30
二、选择题
CBCCB
三、解答题
1、总体：某地10000名学生的数学考试成绩
个体：每个学生的数学考试成绩
样本:300份试卷的数学考试成绩
样本容量：300
2、(1)频数列从上往下：6 14 50 频率列从上往下：0.28 1 (2)50名学生的成绩 (3)80.5~90.5最多 (4)约为1800人
练习十三
一、填空题
普查 抽查
一批冰箱的冷冻效果 每台冰箱的冷冻效果 30台冰箱的冷冻效果 30
36°
30
二、选择题
CBCCB
三、解答题
1、总体：某地10000名学生的数学考试成绩
个体：每个学生的数学考试成绩
样本:300份试卷的数学考试成绩
样本容量：300
2、(1)频数列从上往下：6 14 50 频率列从上往下：0.28 1 (2)50名学生的成绩 (3)80.5~90.5最多 (4)约为1800人
练习十四
一、选择题
DDCBA
二、填空题
不可能
随机
1/6 1/2 1
三、应用题
1、(1)0.68 0.74 0.68 0.69 0.705 0.701 (2)画图略 (3)接近0.7 成功率70%
2、(1)红球黑球各4个 (2)红球黑球各3个,白球2个 (3)红球黑球白球黄球各2个
练习十五
一、选择题
BABBBABACB
二、填空题
2×10^-4
±1
-1
-3
5
3:4:5
70°
120
三、解答题
1、计算
-6
-x^2-x+8
2、因式分解
2(a+b)(x-1)
(x+y)^2(x-y)2
(a+b)(a+b-4)
(x-2)^2
3、4xy=3 x^2+y^2=6.5
4、a+2b=3
第五题略
6、基本价1.6元/立方米,加价后5元/立方米
7、面积是76平方米
第八题略
9、(1)100 (2)从左往右是50 0.10 (3)15.5~20.5 (4)略
10、不公平.规则改为：两个骰子同时掷,若掷出的两个点数之和为奇数,则小勇赢,若为偶数,则算小燕赢.
这位大虾选我吧!

LZ 我有整本答案、确定版本一样!要的密我 1041493539 !

练习一
一
1.D 2.H 3.E 4.F 5.I 6.A 7.J 8.C 9.B 10.G
二
friendly lying twelfth twenty countries dog"s has child wooden busy
三
my favourite place more than ten rooms share a room with Amy can"t wait to do 于.不同
在同一时间 至少 长时间的飞行 做饭
四
1.B 2.C 3.A 4.D 5.B 6.C 7.B 8.D 9.C 10.C
五
speak to who"s from now call telephone tell
六
for called with over to After to
练习二
（能力提高） 第二题 1.to live 2.sitting 3.friendly 4.is putting 5.teacher's 6.countries 7.mine 8.to grow
练习三
二 完形填空CABDACDDDC
练习五
一 会话配对DAFHGIJECB
练习七
五,dbcbddccdb
六,way ok along on drive how take by and
七,1,drives car to factory
2, i'm afaid
3,trying to
4,shall take
5,going to hold
6,straight see bright
7,the way to
8,going to rain take umbrella
9,who shall invite
10,are looking forward to visiting
练习八
二,badabdabbc
三,1,robbers
2,are planning
3,turning
4,seeing
5,foreighers
6,cheapest
7,surprised
8,will do
9,raing
10,doesn't eat
四,to way go along pass go by find you right
五,1,favourite football player above
2,straight on until traffic lights
3,surprised there wrong with work
4,wait to run towards
5,failed in
6,later more fine art
7,will take to
8,choose any like
练习一
一、SHEFIAJCBG
二、1、friendly
2、lying
3、twelfth
4、twenty
5、countries
6、dog's
7、has
8、child
9、wooden
10、busy
三、
1、my favourite place
2、more than ten rooms
3、share a bedroom with Amy
4、live on the fifth floor
5、can't wait to do ...
6、与……不同
7、在同一时间
8、至少
9、长的飞机旅行
10、烧饭
四、
BDADBCBDCC
五、
speak to
Who's
from
study
call number
tell
六、
1、about
2、of
3、with
4、near
5、near
6、to
7、After
8、to