在调速系统中称为有静差调速系统的是()。A、开环系统B、闭环系统C、单闭环系统D、双

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问题:

在调速系统中称为有静差调速系统的是()。

A、开环系统

B、闭环系统

C、单闭环系统

D、双闭环系统

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句型转换

1. Must we drink eight cups of water every day?(作否定回答)

    No, __________ __________ __________ __________.

2. You'd better ask our computer teacher for help.(改为否定句)

    You'd better __________ __________ our computer teacher for help.

3. He talked with his father on the phone.(对画线部分提问)

    __________ did he __________ with his father?

4. His father coughs badly, so he must stop smoking. (同义句转换)

    His father has a bad cough, so he must __________ __________smoking.

5. What's wrong?(同义句转换)

     What's __________ __________?

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宴会就餐应注意哪些礼仪?

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加热炉瓦斯火嘴结焦的原因?

题型:单项选择题

B100—50单级悬臂式离心水泵的规格是( )。

A.入口直径100mm,扬程50m水柱

B.流量100m3/h,扬程50m水柱

C.扬程100m水柱,流量50m3/h

D.扬程100m水柱,入口直径50mm

题型:单项选择题

对疟疾由一定效果的抗生素是:

A.氯霉素
B.四环素
C.二者均是
D.二者均不是

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