23. --Is this kite ?
--No, it’s mine. It’s made by .
A. he; myself B. him; me C. his; himself D. his; myself
22. --When will the World Exposition(世博会) begin?
--The Expo will begin May 1, 2010.
A. in B. on C. at D. by
从A、B、C、D四个选项中选出可以填入空白处的最佳答案,并把答题卡上对应题目的答案标号涂黑。
21. --It’s nice day, isn’t it?
--Yes, what fine weather!
A. a; a B. the; the C. a; / D. the; /
第三节:短文理解。(每小题1.5分.共12分)
听两遍。根据你所听到的短文内容,从A、B、 C三个选项中选出正确答案。并把答题卡上对应题目的答案标号涂黑。
(A)
13. In England many students take jobs .
A. during their summer holidays
B. during their school time
C. at the weekend
14. The students who take jobs must be years old.
A. 18 B. 17 C. 16
15. The students usually work
A. all day B. 4 or 5 hours a day C. more than 8 hours a day
16. The students take jobs to for their own life.
A. learn something B. make, me money C. find some help
(B)
17. What was the most important day to the man?
A. April 19,1999 B. April 9,1989 C. April 9,1999
18. What do you think of the driving teacher’s words?
A. They helped the man a lot.
B. They made the man think of the tester’s (考官) face.
C. They made the man feel worse.
19. What was the tester’s first question?
A. Do you think you can pass if you drive like this?
B. What will a good driver do when he sees a dog in front of his car?
C. If a dog suddenly goes in front of our car, what will you do?
20. Why was the man so surprised when he saw "PASSED" on the paper?
A. Because he didn’t think he could pass after he answered the tester’s questions.
B. Because he drove very badly during the test.
C. Because he didn’t answer any of the tester’s questions.
第二节:对话理解。(每小题1.5分,共9分)
听一遍。根据你所听到的对话和问题,从A、B、C三个选项中选出正确答案。并把答题卡上对应题目的答案标号涂黑。
7. A. A policeman. B. A teacher. C. A doctor.
8. A. Jim. B. Tony. C. Ted.
9. A. By bus. B. Walk C. By bike.
10. A. She’s shopping. B. She’s reading. C. She’s cleaning.
11. A. Playing the guitar. B. Hard-working. C. Beautiful.
12. A. 15 dollars. B. 20 dollars. C. 30 dollars.
第一节:情景反应。(每小题1.5分,共9分)
听一遍。根据你所听到的句子,从A、B、C三个选项中选出最恰当的答语,并把答题卡上对应题目的答案标号涂黑。
1. A. Yes, I’d like. B. Either is OK. C. Thank you.
2. A. Don’t say so. B. It doesn’t matter. C. I don’t think so.
3. A. No problem. B. It’s a good idea. C. No, you can’t.
4. A. Be careful. B. Don’t go. C. I’m sorry to hear that.
5. A. Thank you. B. I am proud. C. You’re right.
6. A. It’s a pity. B. Good job. C. That’s it.
8. ⑴当物块相对小车静止时,它们以共同速度v做匀速运动,相互作用结束,v即为小车最终速度
mv0=2mv v=v0/2=3m/s
⑵ S=6m ⑶
⑷物块最终仍停在小车正中。
*此解充分显示了全过程法的妙用。
7.A滑上B后到B与墙碰撞前,系统动量守恒,碰前是否有相同速度v需作以下判断:mv0=(M+m)v, ①v=2m/s
此时B对地位移为S1,则对B: ②S=1m<5m,故在B与墙相撞前与A已达到相同速度v,设此时A在B上滑行L1距离,则 ③ L1=3m
[以上为第一子过程]此后A、B以v匀速向右,直到B与墙相碰(此子过程不用讨论),相碰后,B的速度大小不变,方向变为反向,A速度不变(此子过程由于碰撞时间极短且无能量损失,不用计算),即B以v向左、A以v向右运动,当A、B再次达到相同速度v′时:Mv-mv=(M+m)v′ ④ v′=2/3 m/s向左,即B不会再与墙相碰,A、B以v′向左匀速运动。设此过程(子过程4)A相对B移动L2,则
⑤ L2=1、33m L=L1+L2=4.33m为木板的最小长度。
*③+⑤得 实际上是全过程方程。与此类问题相对应的是:当PA始终大于PB时,系统最终停在墙角,末动能为零。
6.⑴由A、B、C受力情况知,当B从v0减速到零的过程中,C受力平衡而保持不动,此子过程中B的位移S1和运动时间t1分别为: 。然后B、C以μg的加速度一起做加速运动。A继续减速,直到它们达到相同速度v。对全过程:mA·2v0-mBv0=(mA+mB+mC)v ∴ v=v0/3
B、C的加速度 ,此子过程B的位移
∴ 总路程
⑵A、B不发生碰撞时长为L,A、B在C上相对C的位移分别为LA、LB,则 L=LA+LB
*对多过程复杂问题,优先考虑钱过程方程,特别是ΔP=0和Q=fS相=ΔE系统。全过程方程更简单。
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