按照“临床必需、安全有效、价格合理、使用方便、市场能保证供应”的原则遴选的是（） A

阅读短文，选择正确答案。

    As you grow bigger and stronger, are you growing in mental (心理) health as well?

    Let us take a very simple example: If you feel that a younger brother or sister gets too much of your parents'

attention you may be unhappy. Then ask yourself, "Do you want this kind of attention from your parents?"

You certainly want your parents to treat you as a grown-up. You should be the first person to stand up for them.

So if you enjoy their staying with you, you will find your family life is full of fun instead of trouble.

    Learn to smile at, love and help people. Have confidence (信心). Be sure that other people may like to help

you and never lose the chance to make use of their help.

1. From the passage, we know _______. [ ]

A. a person should love and help others

B. you grow mentally healthy as you grow bigger and stronger

C. you can't get away from the trouble of family life

D. parents usually like the younger sister or brother better

2. If you enjoy your family life you'll find _______. [ ]

A. your parents don't love you at all.

B. there is so much trouble in your family

C. you have to take care of your parents

D. it is full of fun in your family

3. The writer gives the simple example to _______. [ ]

A. tell us parents aren't always kind to all their children

B. help you to grow in metal health

C. explain that you aren't old enough to grow up

D. show younger brothers and sister always want to get everything

4. The underlined word treat probably means _______. [ ]

A. 喜欢

B. 讨厌

C. 对待

D. 建议

5. Which of the following is NOT TRUE? [ ]

A. Learn to smile at others.

B. Have confidence.

C. Be sure that other people may like to help you.

D. It's not good to make use of other people's help.

抵债资产

计量泵启动时，将泵的冲程调为零的目的是（）。

A.防止电机超电流

B.防止电机超电流、防止出口超压

C.防止泵出口流量突然增大造成其它系统波动

D.防止泵的出口超压

影响悬浮液动态稳定性的因素？