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【简答题】
在三菱PLC中输入继电器符号用____表示,输出继电器符号用____表示。
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反馈参考答案：
举一反三
【简答题】产生X线管靶面损坏的常见原因有哪些?
【单选题】If you don't know the meaning of the word, you simply can __________ a dictionary.
A.
make out
B.
go over
C.
look up
D.
refer to
【简答题】短文填空。 The mobile phone is a useful thing, but maybe I don't know (1)h to use it. Sometimes it makes things difficult for me. One day I wanted to see my friend nearby. I could (2)a at his house in five...
【单选题】We don't like him because he is always speaking highly of the part he________in the group. [ ]
A.
makes
B.
takes
C.
does
D.
plays
【多选题】易造成变压器绕组绝缘损坏的原因有（）
A.
短路故障和负荷的急剧多变使绕组受到很大的电磁力矩，而发生位移或变形
B.
变压器的停送电和雷击波使绝缘因过电压而损坏
C.
长时间过负荷运行，绕组产生高温损坏绝缘
D.
绕组绝缘受潮，造成匝间短路
【简答题】听下面一段对话,回答第1至第3三个小题.现在你有15秒钟的时间阅读这三个小题. 1. Where did this conversation take place? A. On the phone. B. At the woman's. C. At the man's. 2. Who is the man? A. A policeman. B. A criminal. C. A ticket s ...
【简答题】常见的变压器类型有( )和干式变压器。
【单选题】— Don’t ______ this old man. It’s not polite. — Sorry, we won’t do that again.
A.
end up
B.
laugh at
C.
make up
D.
give up
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