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【判断题】
在设计 PLC 的梯形图时，右母线与线圈之间是否需要触点可以根需要增加。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】与常规发电技术相比,光伏发电系统有很多优点。下面哪一项不是光伏发电系统的优点() 。
A.
清洁环保，不产生公害
B.
取之不尽、用之不竭
C.
不存在机械磨损、无噪声
D.
维护成本高、管理繁琐
【简答题】B Will it matter if you don' t take your breakfast? Recently a test was given in the United States. Those tests included people of different ages, from 12 to 83. During the experiment, these people we...
【简答题】I suspect not everyone who loves the country would be happy living the way we do. It takes a couple of special ( R 1) ____________ . One is a tolerance for solitude. Because we are so busy and on such...
【简答题】Alcohol is often taken as a symbol of a special celebration or as a sign of friendship．So it is 36 to see people toasting with a large glass of alcohol to the health or fortune. 37 , every year, ...
【单选题】Task3: Choose the best answer and complete the passage ( 选择最恰当的选项完成短文 ) ( 词数: 247) After giving a talk at a high school, I was asked to visit a(n) 5 student. An illness kept the boy home, but he was ...
A.
special
B.
strange
C.
important
D.
wrong
【单选题】与常规发电技术相比,光伏发电有很多优点。下面( )不是光伏发电系统的优点
A.
清洁环保，不产生公害
B.
取之不尽、用之不竭
C.
不存在机械磨损、无噪声
D.
维护成本高、管理繁琐
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