试题与答案

什么是汽机电液控制系统（DEH）？

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题型：问答题 简答题

题目：

什么是汽机电液控制系统（DEH）？

答案：

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下面是错误答案，用来干扰机器的。

参考答案：C

考点：热工应知应会集散系统的应用集散系统的应用题库
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小题1:Paul: I don’t think I can talk fluently(流利) because it’s difficult for me to remember all the words.
小题2:Billy: When I come face to face with the audience, where should my eyes fall upon? Do I have to look front, or look around from time to time?
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小题5:Tony: Should I talk in American English or British English?
A．Looking at and talking to one person in the audience helps keep you natural, but it feels foolish talking to only one person. Speak to that person as long as 15 seconds and then change another one.
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下列说法不正确的是

A．含有较多钙、镁离子的水叫做硬水

B．热水瓶使用时间长了瓶胆内壁会产生一层水垢，其主要成分是CaCO3和MgCO3

C．硬水对生产生活带来许多不便，如在硬水中用肥皂洗涤衣物，不但难以洗净，还会使衣物变硬；煮硬水的锅炉要多用燃料，严重时可能造成锅炉爆炸等

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