【单选题】
对电机各绕组的绝缘检查,如测出绝缘电阻为零,在发现无明显烧毁的现象时,则可进行烘干处理,这时___通电运行。(单选题)
A. 允许
B. 不允许
C. 烘干好后就可
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答案
B
解析
暂无解析
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【单选题】
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Which two statements about hardware-based encrption are true?___
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In which two modes can the Cisco We b Security appliance be de ployed?___
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1.三相刀开关的图形符号与交流接触器的主触点符号是___。
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【单选题】
2.刀开关的文字符号是___。
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【单选题】
3.行程开关的文字符号是___。
A. QS
B. SQ
C. SA
D. KM
【单选题】
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A. QS
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【单选题】
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【单选题】
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