第1个回答 2011-02-01
寒假作业英语
英语之一
CABDA humour,mixed,photos,worry,thinks,true,mine,to travel,swimming, the heaviest,speaking
Tourists,trys,Running,fun,magazines
拓展研究1、walking home 2、How far 3、shorter as tall as 4、Both and are5、better other
快来译译1、don’t camping dangerous outdoor activity2、how to answer advice
3、Climbing healthier diving
4 He has poor eyesight ,so he always wear the glasses.
5 This story is more exciting than that story.
感受体验 略
英语之二
一、DCACACDB
二、myself ,drives,delicious ,cleverer,closed,heroes,admire,the cleverest,loss,sounds,size,yours
拓展探究 1、 don’t is right 2、Why not 3、not as same as 4、as well 5、Wang Min has 5 yuan less than me . I have 5 yuan more than he .
创新展台1、Why don’t we change to play volleyball? 2、They swam happily in that river yesterday. 3、She practises play softball every week. 4、John studies fewer subject than Nancy.
5、He don’t know how to cook healthy and delicious food.
感受体验 略
英语之三
一、CDDCA 二、to visit,to get,on meeting,to read,to close,beginning,boring,greetings,leaves,to hold 三、beauty,airports,more than,sunset,coach,half-time
拓展探究 1、What did do 2、Did look 3、or 4、taught myself 5、enjoyed ourselves
创新展台 1、to prepare 2、couldn’t believe 3、these photos on the Internet 4、to see interest of places 5、for oneself
感受体验CCAA
英语之四
一、BABBC二、delicious,forests,protect,encourages,Wolves,continue三、doesn’t rain,will die,buy ,playing,is
拓展探究up to ,grew into ,cutting down ,not any more ,in danger
创新展台1、following actions to 2、encourages to protect 3、doesn’t rain will stay4、very difficult survive 5、 number is bigger and bigger
感受体验 略
英语之五
一、DDDAD 二、northern ,endangerous,incorrect,dishonest,tourists ,unnecessary,provides,impossible,carelessly
1、wrong ,and 2、rained heavily 3、endangerous,birds 4、How long did 5、has an
快乐译译
1、 More and more bierds are in danger because they do not have enough space to live.
2、 We hope everyone can do something to protect wildlife.
3、 Miss Li is one of my school’s welcome students.
4、 People change wetlands to make space for farms.
5、 If you practice singing ,you’ll sing very well.
感受体验
48感受体验
Churchill Language School, Oxford
A driver
English
Ten months
In Park Road at No.1123
英语之六
1-6 BABBBC
二、moment serious directions temperature
三、walk ,to exercise,Does,like,to visit,go ,went,will be,met,talking, to tell,left,watching
拓展研究
fell down , was snowy,were trapped,turn off,at last,said to himself,try my best,as if
创新展台
1、 calmed down was trapped dark around me
2、 ran in all directions
3、 were in a hurry to
4、 looked at each other in fear
5、 tried their best to save him
6、 Because of didn’t eat anything
感受体验BCDDB
英语之七
一、CDABBCB
二、accident ,calm ,shaking,directions,weather like ,trouble ,earthquake,serious
拓展研究
1、 told to keep
2、 What’s like
3、 a heavy rain
4、 hurry to
5、 Why does he
创新展台 DAECB
感受体验FFTTTF
英语之八
一、DBCDBDCA
二、cloudy,pull,leaves,made,busiest,carefully,noisily,moves,more,advice
拓展探究
快乐译译 He will arrive at 8:00 in the morning.
We won’t go camping next week because we’ll prepare the text.
We should try our best those people in need.
I will have a picnic if I am free next week.
Less and less people buy clothes made of animal fur.
感受体验CDABD
感受体验 略
英语之五
一、DDDAD 二、northern ,endangerous,incorrect,dishonest,tourists ,unnecessary,provides,impossible,carelessly
1、wrong ,and 2、rained heavily 3、endangerous,birds 4、How long did 5、has an
快乐译译
1、 More and more bierds are in danger because they do not have enough space to live.
2、 We hope everyone can do something to protect wildlife.
3、 Miss Li is one of my school’s welcome students.
4、 People change wetlands to make space for farms.
5、 If you practice singing ,you’ll sing very well.
感受体验
48感受体验
Churchill Language School, Oxford
A driver
English
Ten months
In Park Road at No.1123
英语之六
1-6 BABBBC
二、moment serious directions temperature
三、walk ,to exercise,Does,like,to visit,go ,went,will be,met,talking, to tell,left,watching
拓展研究
fell down , was snowy,were trapped,turn off,at last,said to himself,try my best,as if
创新展台
1、 calmed down was trapped dark around me
2、 ran in all directions
3、 were in a hurry to
4、 looked at each other in fear
5、 tried their best to save him
6、 Because of didn’t eat anything
感受体验BCDDB
英语之七
一、CDABBCB
二、accident ,calm ,shaking,directions,weather like ,trouble ,earthquake,serious
拓展研究
1、 told to keep
2、 What’s like
3、 a heavy rain
4、 hurry to
5、 Why does he
创新展台 DAECB
感受体验FFTTTF
英语之八
一、DBCDBDCA
二、cloudy,pull,leaves,made,busiest,carefully,noisily,moves,more,advice
拓展探究
快乐译译 He will arrive at 8:00 in the morning.
We won’t go camping next week because we’ll prepare the text.
We should try our best those people in need.
I will have a picnic if I am free next week.
Less and less people buy clothes made of animal fur.
感受体验CDABD
寒假作业生物答案
1~6ADBADC
7.水,空气,微量元素,植物,动物,微生物
8.(1)传入神经,神经中枢,感受器,效应器,传出神经(2)神经冲动
9.(1)卵壳;气室; 内、外卵壳膜;系带;卵黄;卵白;胚盘(2)储存空气;由受精卵分裂形成是胚胎发育的部位。
10.动物运动方式是多种多样的,陆生动物如昆虫和鸟类的运动方式是飞行或滑翔 ,其他陆生动物的运动方式主要是行走、奔跑、跳跃和 爬行等,如蜥蜴、熊等;水生动物的运动方式以游泳为主。
11.(1)贫血,红细胞的数量低于正常值(2)炎症,白细胞的数目高于正常值(3)凝血障碍,血小板的数目低于正常值。(4)缺铁性贫血,血红蛋白的含量明显低于正常值。(5)其他检查。
14.正午时候,猫的眼睛是眯着的。张画师画的滚圆的,因此有误,假画。
寒假作业数学答案
三.几何与说理。
1.连接AC,因为AD=4,CD=3,所以由勾股定理得:AC=5.又因为AB^=13^=169,BC^+AC^=12^+5^=169.所以:AB^=BC^+AC^.由勾股定理逆定理得△ABC是直角三角形.S四边形ABCD =RT△ABC-RT△ADC
5楼
=(12×5)/2-(3×4)/2=30-6=24 .
2.AB,AC
3.因为AB=AC.所以∠ABC=∠C.因为BC=BD.所以∠C=∠BDC=∠ABC.因为AD=DE=BE.所以∠A=∠AED=2∠EDB.所以∠DBC=2∠EDB.又因为∠C=∠BDC.所以∠C=3∠BDE ∠BDC=3∠EDB.所以∠EDB=180÷(2∠EDB+3∠EDB+3∠EDB)=22.5°又因为AD=DE.所以∠A=∠AED=2∠EDB.所以∠A=45°.
4.(1)∵DE是△ABC的中位线.∴DE=1/2AC,CE=BE.∵CF=1/2AC.∴CF=DE.∵CF=DE,CE=BE,∠BCF=∠DEB=90°∴△CFE≌△EDB(SAS).∴EF=DB.∵AD=DB.∴EF=AD.∵四边形ADEF是梯形.∴四边形ADEF是等腰梯形.
(2)∵∠1=∠2∴BM=AM.∵AB//CD.∴∠1=∠CMB,∠2=∠DMA,∴∠DMA=∠CMB∵M是CD的中点∴CM=DM.∴△CMB≌△DMA(SAS)∴梯形ABCD是等腰梯形 .
(3)∵E是BC中点,∴BE=EC,又∵EF⊥AB于F,EG⊥CD于G.且EF=EG,∴△BEF≌△EGC(HL),∴∠FBE=∠GCE,又ABCD为梯形,∴梯形ABCD是等腰梯形 .
(4)过点D作DE‖AC交BC的延长线于E,则∠BDE=90°.再过D作DF⊥BC于F.
∵梯形ABCD是等腰梯形,则AC=BD.又∵AD‖BC,DE‖AC.∴四边形ACED是平行四边形.∵AD=CE,AC=DE=BD
∴△BDE是等腰直角三角形. 则 DF=1/2 BE=1/2(BC+CE)=1/2(BC+AD)=1/2(m+n) ∴S梯形ABCD=S△BDE=1/2 BE×DF=1/4(m+n)(m+n)=1/4(m+n)^ 故 (m+n)^=4S梯形ABCD.
(5)在等腰梯形ABCD中 AB=CD ∠ABC=∠DCB BC是公共边,∴△ABC≌△DCB(SAS).
∴AC=BD AD是公共边∴△ABD≌△DCA(SSS)
∴∠ABO=∠DCO ∠AOB=∠DOC △ABO≌△DCO(AAS)
∴OB=OC ∠BOC=60° ∴△OBC是等边三角形. 同理:△AOD也是等边三角形.
连DE与CF, 由EF=1/2AB=1/2CD(EF是△AOB的中位线)∴EF=DG=CG(G是CD的中点)
∵E是AO中点. ∴DE是AO的垂直平分线. ∠DEC=90°.EG是△DEC的中线. ∴DG=EG,∴EF=DG=EG
CF也是BO的垂直平分线. ∴∠DFC=90° ∴FG=CG=EF ∴△EFG中 EF=EG=GF. ∴△EFG是等边三角形。
第2个回答 2011-01-27
练习一
一.
honest secrets really nothing more bowls magazines special slim round
二.
1.she will cry if her mother leave her on her own
2.why does his legs do not fit under the school desks
3.betty and i may not got to see each other often
4.thy boy is jim and he wants to see you
5.are we think climbing is as exciting as skating
三.
E D B A C
四.
D D D B D C B B A C
五.
C C B D D A B A C B
六.
A A A A B
练习二
一.
geography tennis popular health
二.
1.is different from
2.is more boring than
3.the tallest of
4.more classes than
三.
like classrooms library spend
四.
B D D C C B B A D A C
五.
D B A B C B D B C D
六.
B B D D C
练习三
一.
tie more winner remember tickets
二.
1.nance went on a trip to suzhou by train
2.i hope he can come tomorrow
3.lida,don't tell anyone about this things
4.they decided to watch tv last night 5.today is sunny but he stays at home not go out
三.
trip 6:30 food park 4 80
四.
C A A A B C C A A D
五.
fishing got arrived clean sorry singing like catch bigger enough
六.
C B C D B
练习四
一.
litter metal chocolate quiet finish sunny
二.
angers peaceful tour importance heavy
三.
took last are are hurry selling sell
四.
1.jion the school trip
2.feel sick
3.make a home page
4.by underground
五.
1.what exciting news!
2.at the very beginning
3.what did the teacher tell us not to do
4.how often do we do a bird count
5.the students got up early so they could watch birds
六.
A D D D C C B A
七.
A B A C C C B C B D
八.
B C B D A
练习五
一.
met reading travel drop are watching do finish pay
二.
go birding
make space for
have nowhere to live
give me some advice
at a time
三.
1.easier than
2.or will
3.made of
4.won't at all
5.expect help
6.was rainy
7.fly p.m
8.endangered birds
四.略
五.略
六.略
练习六
一.
D A A C C C A C A D D B A A C C B C C B
二.
C G A E D
三.
B D C A B A C B C D
四 略
初二轻松快乐过寒假 数学答案
练习一
一.
1.3
2.40
3.8,6或7,7
4.5cm
5.130,50,50
6.6
二.
B A B B
三.
11.略
12.略
13.6cm
14.图略
练习二
一.
A C B D C C A B A C C B
二.
13.±8 -3
14.12 -6.2
15.3 3/4
16.〉 〈
17.1/2
18.2.4根号5
19.6
三.
20.3
21.-根号2+根号5
22.8
23.24+16根号3
24.不能
25.3根号250
26.(1)略
(2)2根号5+2
练习三
一.
D B D A C
二.
6.10
7.90
8.30
三.
9.略
10.略
11.(1)略
(2)8根号3
12.60 120 60 120
练习四
一.
1.表格 统计图
2.(2,-3)
3.4 3
4.二
5.(4,-4)
二.
C C B C A B
三.
12.略
13.B(1,0)
C(0,根号3)
D(-4,根号3)
14.略
15.(1)略
(2)C(0.5,0)
练习五
一.
B B D A A C C B
二.
9.S〓1.5a
10.-2
11.1/4
12.≥-4/5
13.y=50-0.3x
14.v=5t+10 16
三.
15.(1)s=24 -4.8t
(2) 5
16.在第四象限上
17.略
18.(1)D(2,1) (-2,1) (0,-1)
(2)y=x-1
19.(1)OA
练习六
一.
1.3
2.96,93
3.5
4.160
5.2.5
6.165
7.9
8.86.5
二.
c c D D
三.
13.(1)8
(2)8X+12y+7
14.(1)平均数:21.8
众数:22
中位数:22
(2)22尺码
15.不同意
练习七.
一.
B D B C B D C B A A
二.
11.169
12.6 -2
13.1.8×10的九次方
14.∠DBA=∠A 3
15.(3,2)
三.
16.242/27
17.44 68 68
18.略
19.略
练习八
一.
B A A D A C D
二.
8.±2
9.-2
10.8850 8.8.5
11.3
12.16或17
13.2根号3
14.(-4,2)
15.y=2.1+0.3x
16.4 7
17.-5
18.369/25
19.(1)中位数:75
众数 :75
20.(1)3
(2)减少
(3)(3/2,0)
(4)〈3/2
21.略