2013~2014学年3A创新卷（四）

亲各地各学校的考试卷都是不一样的,所以没有题是无法帮你的,你最好能把题发上来,清楚点那就能帮你了,

没有一千财富值这种问题就不要再问了.没用,没人给你回答.

记叙文体,有话题.直接给题.给一段话的半命作文.作文注重抒情,有层次感.最重要是把字写好
仅供参考!

网上有，可是怎么发。。。

代做寒假作业!

Book 2 Modules 3-4参考答案及部分解析(第5期)3188

参考答案(解析见附件)

1-5DCCDC 6-10AACCB

11-15BCCDA 16-20BACDB

21-25CDDAC 26-30ABCBD

31-35DDBCD 36-40DCADD

41-45CDDCD 46-50BCBBD

51-55FGBDA

56.Because the family couldn’t afford the doctor bills.

57.A kind of drug.

58.To draw others’ attention to her.

59.He did an operation.

60.Because he was moved by her faith and love.

短文改错：

61....read about the ...去掉about

62....idea of be ...be → being

63.I held view ...view前加the

64....my teacher agreed.agreed → disagreed

65....work hardly ... hardly → hard

66....right things ...things → thing

67.On general ...On → In

68....who is prepared ... is → are

69....about make money ... make →making

70....keeping going ...keeping → keep


One possible version:

Dear Jack,

I'm really glad to hear from you and know how you are getting along.I think it is common for you not to get used to the life there.Here I have some suggestions for you.
First of all,you should respect local customs and try to involve yourself in the natives' lives.Just as a saying goes,“When in Rome,do as the Romans do.” Secondly,don't forget to communicate with American students and make friends with them.Friendship will bring you happiness.What's more,it is better for you to take more outdoor activities with your friends,which may help you relax and have fun.Finally,mind your own manners and remain modest and honest when getting
along with your friends.
I hope you can adapt to your new life soon and enjoy your stay there.
Keep in touch.
Yours,

Li Hua

17 (1)
因为a3+b5=21,a5+b3=13,{an}是等差数列,{bn}是等比数列
所以a1+2d+b1*q^4=21,a1+4d+b1*q^2=13
因为a1=b1=1
所以2d+q^4=20,4d+q^2=12
2d+q^4=20方程乘以2得4d+2*q^4=40
用4d+2*q^4=40减去4d+q^2=12得2*q^4-q^2-28=0即(2*q^2+7)*(q^2-4)=0
所以2*q^2=-7或q^2=4
当2*q^2=-7时q^2=-3.5(不符合,舍去)
当q^2=4时q=2或-2
因为bn}是各项都为正数的等比数列
所以q=2
综上所述得q=2
带入4d+q^2得d=2
所以 an=2n-1
bn=2^(n-1)
(2)
an/bn=(2n-1)/2^(n-1) 叠加
a1/b1=1
a2/b2=3/2
……
sn=1+3/2+5/4+7/8+……(2n-1)/2^(n-1).(1)
2sn=2+3+……+(2n-1)/2^(n-2).（2)
(2)-(1),得 sn=6-(4n+6)/(2^n)

苏教版还是人教版

发图

25．学科王
（1）样本的容量是：28÷35%=80．
（2）360°×
80
24
=108°．
（3）“体育”部分人数=80-28-24-8=20人；
画图如图所示．
（4）2870×
80
8
=287．
26．证明：
∵ AD⊥BC,EG⊥BC,
∴ ∠ADC=∠EGC=90°,
∴ AD∥EG,
∴ ∠1=∠2, ∠E=∠3 ．
∵ ∠E=∠1,
∴ ∠2=∠3, ∴ AD平分∠BAC ．

只要努力,一定能考好!相信自己!

23
(1)
x-1=tcosO (a)
y-1=tsinO (b)
方程左右平方相加
（x-1）^2+（y-1）^2=t^2 (1)
(a)/(b)得
（x-1）/(y-1) = tanO (2)
代入点公共点得 t^2=2,tanO=1
所以普通方程
C1:（x-1）^2+（y-1）^2=2
C2:y = x
(2)
x=ρcosθ
y=ρsinθ
C1极坐标方程：θ=arctany/x =π/4, 即
交点（ρ,θ）=(X/cosθ,θ)=（√2+2,π/4）
11
-1