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【判断题】
“ 三同时 ” 就是安全设施与主体工程的设计、施工和投入运行必须同时。A.
正确
B.
错误
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【单选题】Rated current of the three-phase asynchronous motor and the rated voltage refers to ( )
A.
line voltage, phase current
B.
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C.
phase voltage, phase current
D.
phase voltage and line current
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【单选题】In the inductive AC circuit, the phase relation between the current and voltage is ______.
A.
current stays ahead of voltage
B.
voltage stays ahead of current
C.
they have the same phase
D.
they have the opposite phase
【简答题】被称为我国最最大的古典艺术宝库的石窟是哪一个?
【简答题】被称为我国最最大的古典艺术宝库的石窟是（）。
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