问题 不定项选择

如图所示,墙上有两个钉子ab,它们的连线与水平方向的夹角为45°,两者的高度差为l。一条不可伸长的轻质细绳一端固定于a点,另一端跨过光滑钉子b悬挂一质量为m1的重物。在绳子距ac点有一固定绳圈。若绳圈上悬挂质量为m2的钩码,平衡后绳的ac段正好水平,则重物和钩码的质量比

[ ]

A.

B.2

C.

D.

答案

答案:C

阅读理解

阅读理解。

     Michelle Wie, from America, is like a lot of other young girls in many ways. She is a good student, and

she is a good student, and she likes reading, drawing, and computers. However, in some other ways, she is

very different. She doesn't spend much time going out with friends or shopping or going to parties. She's

very busy practicing golf.

     Michelle Wie is the best woman golfer for her age in the world. She was born in 1989. In 1999, at the

age of 10, she began to win games against woman twice her age. At 13, she could hit the ball further than

most of the women in the Ladies Professional Golf Association (LPGA). At 14, she showed she could hit

the ball further than most men.

     Wie began playing golf at the age of four. When she grew older, she played about four hours a day on

weekdays and seven hours a day on weekends. Another thing that helped he was that she was tall. By the

time she was 13, Wie was six feet tall. She's a joy to watch. She has the flexibility of a dancer and also is

very strong. And its clear that she loves the game.

1. When did Michelle Wie start playing golf?

A. At 4

B. At 10

C. At 13

D. At 14

2. What does she often do after school?

A. Going out with her friends.

B. Shopping with her family.

C. Going to parties.

D. Practicing golf.

3. How long did she practice on weekends when she grew older?

A. 3 hours

B. 4 hours

C. 7 hours

D. 8 hours

4. What makes her a successful golfer?

A. Dance.

B. Practice.

C. Drawing.

D. Computers.

5. Which of the following is the best title for this passage?

A. Michelle Wie, A Good Student

B. Michelle Wie, A Young Winner

C. Women Golf Players

D. Golf Games For Women

单项选择题