下部钻具组合设计的基本原则就满足哪几方面的要求？

阅读理解。

    I'm Mary. I have a piece of good news to tell you. My parents bought a new flat in

the centre of the city. The rooms are not big, but they are all comfortable. There are

more rooms than our old flat. I am excited (激动) because I have my own bedroom.

In the old flat, I share the bedroom with my sister.

    My favourite room in the new flat is my bedroom. I can be alone (单独) in it. It is

my own small world. I can listen to music, read comics and chat with my friends on

the phone. I can also look for things on the Internet and send e-mails to my e-friends.

    Kitchen is my favourite room, too. I like helping my mother with the cooking. She is

not only a good teacher but also a good cook. She often teaches me how to make some

different dishes. She lived in Sichuan when she was a child. So she likes hot food and

she can cook very delicious hot food.

1. What's Mary's new flat like? [ ]

A. Big and comfortable

B. Small and not comfortable

C. Big but not comfortable

D. Small but comfortable

2. Mary can do the following things in the bedroom except (除了) _____. [ ]

A. play the piano

B. chat with her friends

C. send e-mails

D. listen to music

3. Which room does Mary like best? [ ]

A. The kitchen

B. Her bedroom

C. The sitting room

D. Both A and B

4. What does Mary's mother do? [ ]

A. A teacher.

B. A nurse.

C. A housewife.

D. A worker.

5. Where did Mary's mother live when she was a child? [ ]

A. The old flat

B. The centre of the city

C. Sichuan

D. The new flat

氯丙嗪具有（）。

A.中枢性肌肉松弛作用

B.反射性地兴奋呼吸的作用

C.外周性肌肉松弛作用

D.阻断多巴胺受体的作用

E.抑制前列腺素合成的作用

我国自1987年以来，已利用返回式卫星先后搭载过水稻、小麦等（）多种植物400多个品种，以及微生物、蚕卵等，开展了空间生命科学研究。

A.50

B.80

C.100

“勤”应是孩子的必备素质，但如今这一标准越来越被淡化。勤劳挣钱被认为是“死脑筋”；勤奋学习被嘲笑为“不聪明”；勤恳工作被定义成“有点傻”。加强勤劳教育有利于（）

A.实现中 * * 的团结统一

B.弘扬中 * * 热爱和平的民族品格

C.增强中 * * 自强不息的内在气质

D.奠定中 * * 坚不可摧的立业根基

口径较小、介质压力不大、开闭时所需要的力矩不大的阀门，一般采用（）传动。

A、手柄

B、齿轮

C、气动

D、电动