当=0.5时(滞后)随频率升高,误差向负方向变化。()

题型:判断题

问题:

当=0.5时(滞后)随频率升高,误差向负方向变化。()

考点:用电营销考试基础知识基础知识题库
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细菌性痢疾多为()

A.绿色稀汁样便

B.大量稀水样便

C.大量黄色稀汁样便并含有膜状物

D.黏液脓血便,以黏液脓血为主,可无粪质

E.呈暗红色果酱样粪便,以血为主,粪质较多,有特殊腥味

题型:判断题

事件3中合同终止的原因是什么除此之外,还有什么情况可以使合同的权利义务终止

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调查表的结构可分为( )。

A.表头、表体、表脚

B.表首、表中、表尾

C.表注、表体、表尾

D.表头、表体、表尾

题型:判断题

At the time friends visit us in the evening, they often tell us they are in a hurry and look at their watches. It isn’t that our friends are all very busy; it is just that we haven’t got a television. People think that we are very strange. "But what do you do in the evening", they are always asking. The answer is very simple. Both my wife and I have hobbies. We certainly don’t spend our evenings looking at the walls. My wife enjoys cooking and painting and often attends evening classes in foreign languages. This is quite useful as we often go abroad for our holidays. I collect stamps and I’m always busy with my collection. Both of us enjoy listening to the music and playing chess together.

Sometimes there are power cuts and we have no electricity in the house. This does not worry us and we just light candles and carry on with what we were doing before. Our friends, however, are lost—no television! —So they don’t know what to do. On such evenings our house is very full for they all come to us. They all have a good time. Instead of sitting in silence in front of the television, everybody talks and plays games.

At night when there is no electricity, the couple ().

A.have to look at the walls

B.can do nothing but sit in silence

C.will have many visitors

D.have to go out for candles

题型:判断题

局部通风机的工作方法有()。

A、压入式

B、抽出式

C、混合式

D、引射器式

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