问题
单项选择题
低电压保护装置的电压整定值一般为电动机额定电压的()。
A.110%~120%
B.100%~110%
C.70%~80%
D.60%~70%
答案
参考答案:D
低电压保护装置的电压整定值一般为电动机额定电压的()。
A.110%~120%
B.100%~110%
C.70%~80%
D.60%~70%
参考答案:D
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小题3: What does the underlined phrase “take up” mean?
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