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问题 单项选择题

在用比例调节器组成的控制系统中，若PB=120％，调节器输出使调节阀开度变化全行程的一半，则被控量变化了全量程的（）

A.100％

B.120％

C.60％

D.30％

答案

参考答案：C

阅读理解

阅读理解，判断正(T)误(F)。

     Nancy is a student. She wants (想要) to have a blouse. So she goes to a shop (商店) to buy

(买) one.

     The shop assistant(售货员):Good morning I Can I help you?

     Nancy: I'd like a blouse.

     The shop assistant: OK. What colour7 Nancy: I like pink and white.

     The shop assistant: I see.  What about this pink one?

     Nancy: Oh, it's very nice. How much is it? The shop assistant: It's 100 yuan.

     Nancy: Here you are.

     The shop assistant: Thank you.

( )1. Nancy is a student.

(     )2. Nancy likes yellow.

(     )3. The blouse is 100 yuan..

(     )4. Nancy likes the white skirt.

(     )5. Nancy takes the white blouse.
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单项选择题

减少肾素分泌，抑制肾素-血管紧张素-醛固酮系统的药物

A．硝普钠
B．肼屈嗪
C．哌唑嗪
D．可乐定
E．普萘洛尔
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