利用随机模拟的方法近似计算边长为2的正方形内切圆面积,并估计π的近似值.

题型:解答题

问题:

利用随机模拟的方法近似计算边长为2的正方形内切圆面积,并估计π的近似值.

考点:几何概型的定义及计算
题型:解答题

There have been several new events ______ to the program for the 2008 Beijing Olympic Games. [ ]

A. add

B. to add

C. adding

D. added

题型:解答题

操纵巴黎和会的英法美等大国在惩处和削弱德国问题上争夺的根本点是(    )

A.争夺对德国的控制权

B.争夺对国际联盟的领导权

C.争夺战争赔款

D.争夺地区及世界霸权

题型:解答题

阴中求阳的理论依据是()

A.阴阳相互转化

B.阴阳互根互用

C.阴阳相互消长

D.阴阳对立制约

E.阴阳动态平衡

题型:解答题

阅读理解

     The first time I saw Carlos, I had my arms full of books and I was tearing into the classroom when I

ran into something solid. It was Carlos.

     "My, you're tall," he exclaimed.

    Of course, the class began to laugh. Annoyed, I walked to my seat without a word.

     I glanced back to see if Reed Harrington was laughing with the rest. That would be last straw. To my

relief, Reed was studying and did not seem to be aware of it. I didn't know why I considered Reed my

friend. Maybe just because he was a good two inches taller than I.

     "Take that seat," Mr. McCarthy told the newcomer, pointing to the only empty one, in the back of the

room.

     Carlos smiled broadly. "But I need a couple of dictionaries." Again the class laughed, but now they

were laughing with Carlos, not at him. He had been here only 10 minutes and already he had them on his

side.

     It was the school election that made me think of Carlos again. Reed Harrington was voted president

and Carlos vice-president. "How come?" I kept asking myself. "How come this shrimp(虾) who's only

been in town for a little over a month gets to be so popular?"

     So when I met Carlos this morning, I said to him. "It doesn't seem to bother you being short, I mean."   He looked up at me. "Of course I mind being short. But there isn't anything I can do about it. When I

realized I was going to have to spend my life in this undersized skin, I decided to make the best of it. My

motto is-don't be afraid to be yourself."

1. This passage is mainly about a short boy who _____________.

A. won the school election

B. is ashamed of his height

C. has learned to accept his size

D. is embarrassed by the class

2. From the story, we can see that Carlos is _____________.

A. shy but diligent

B. humorous and confident

C. proud and popular

D. honest but sensitive

3. Paragraph 4 suggests that the author _____________.

A. cared much about Reed's attitude

B. thought Reed was the same as the others

C. couldn't stand Carlos playing ricks on her

D. hoped Reed was laughing with the others

4. According to the passage, what happened after the election?

A. Carlos and the author argued with each other.

B. Carlos and Reed became very good friends.

C. The author changed her attitude toward Carlos.

D. Carlos was elected president of the student committee.

题型:解答题

一个游泳池,甲管注满水需6小时,甲、乙两管同时注水,注满要4小时。如果只用乙管注水,那么注满水需( )小时。

A.14

B.12

C.10

D.8

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