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【判断题】
从社会产品价值构成与财政收入的关系来看,增加财政收入的根本途径是减少M的份额。( )A.
正确
B.
错误
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【简答题】材料： The field current supply in older machines comes from a lower voltage direct current generator or exciter on the same shaft as the alternator. Modern machines however are either statically excited...
【单选题】Rated current of the three-phase asynchronous motor and the rated voltage refers to ( )
A.
line voltage, phase current
B.
line voltage, line current
C.
phase voltage, phase current
D.
phase voltage and line current
【简答题】被称为我国最最大的古典艺术宝库的石窟是（）
【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?
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