26.In the 16-19 age group , 32% of women smoke ____28% of men.

A. comparing to　　 B comparing with　 C compared to　　 D compare with

25.--I didn’t mean ___ her.

--But talking like that means ___ her.

A. to hurt , hurt　　 B. hurting , hurting　 C. to hurt, hurting　 D. hurting, to hurt

23.____the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.

A. Because　　　 B If　　　　　　 C While　　　　 D When

24--- _____?

　 ---Honest.

　 A. What does he look like　　　　 B What is he like

　 C. How does he like　　　　　　 D. What does he think of

第一节 单项选择题 (共20小题；每小题1分，满分20分)

请从A, B, C, D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该选项的标号涂黑。

21.We were sad to hear the news that ____ two Chinese people were shot to death in Pakistan, and ___ third one died in hospital later.

A. the, a　　 B the, the　 C 不填，a　　 D不填，the

you imagine the difficulty he has____ the answer___ the question.

A. to find, to　　 　B. found, to　　 C. in finding , of　 D. finding , to

21、(18分)如图所示，一个质量为的木块,在平行于斜面向上的推力作用下，沿着倾角为的斜面匀速向上运动，木块与斜面间的动摩擦因数为.()

(1)　　 求拉力的大小.

(2)　　 若将平行于斜面向上的推力改为水平推力作用在木块上,

使木块能沿着斜面匀速运动,求水平推力的大小

2009年重庆一中高2012级月考考试

20、(16分)如图所示，轻绳AC与天花板夹角α=30°，轻绳BC与天花板夹角β=60°.设AC、BC绳能承受的最大拉力均不能超过100N，CD绳强度足够大，求CD绳下端悬挂的物重G不能超过多少？

19、(14分)如图所示，用一根绳子把物体挂起来，再用一根水平的绳子把物体拉向一旁固定起来. 物体的重量是40N，绳子与竖直方向的夹角30°，绳子和对物体的拉力分别是多大？