循环水泵的导向轴承冷却水起什么作用?

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问题:

循环水泵的导向轴承冷却水起什么作用?

考点:执业西药师药学专业知识二药学专业知识二题库
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Joyce was born in a poor family. Next Friday would be her mother’s birthday. Joyce wanted to buy something for her mother, but she had no money. As an 8-year-old girl, she couldn’t do part-time jobs. What could she do to make enough money for her mother’s birthday present?

Suddenly she had an idea. Usually, she would go straight to school, but this morning, she didn’t. She walked along the streets, picking up cardboard(纸板), plastic(塑料)bottles and cans(易拉罐). When it was time for school, she hid them in the backyard and ran to school as quickly as possible.

Eight days later, she decided to sell all the things she had collected because the next day was her mother’s birthday. She had to sell them and buy a birthday present for her mother. In the shop, she bought a beautiful hair pin for her mother.

When her mother got the present, she said with tears in her eyes,“This is the best present I’ve ever received.”

小题1:How old was Joyce?

A. Seven.           B. Eight.        C. Nine.         

小题2:Why couldn’t Joyce buy a present for her mother at first?

A. Because she had no money.

B. Because she didn’t know what her mother liked.

C. Because she didn’t love her mother at all.

小题3:What was Joyce’s idea?

A. Doing part-time jobs.   

B. Collecting waste things and selling them.

C. Asking her best friend for help.

小题4:How long did Joyce collect the waste things?

A. A week.      B. A month.    C. More than a week.

小题5: How did Joyce’s mother feel when she got the present?

A. Very sad.      B. Very happy and moved.     C. Very surprised.

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读南极洲图,回答问题。

(1)在图上标出地球的自转方向。

(2)在南极洲发现大量的煤炭,应如何解释?

___________________________________________________________________________________________

(3)写出字母代表的大洲名称:A_________,B__________。

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胸外伤引起呼吸困难的机制,下列哪项是错误的

A.气管、支气管分泌物或血液堵塞

B.肺挫伤引起瘀血及水肿

C.反射性中枢调节作用异常

D.气胸、血胸压迫肺脏

E.疼痛使患者的呼吸运动受限

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租赁合同中,租赁期间届满,当事人可以续订租赁合同,但约定的租赁期限自续订立日起不得超过()年。

A.20

B.15

C.10

D.5

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鼠笼式异步电机的定子绕组的作用()。

A.输送电流到电网

B.产生磁场

C.控制电压

D.励磁

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