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【判断题】
如图 所示的单相桥式全控整流电路,控制角 ,带大电感负载时,负载电压 和晶闸管承受电压 波形 。A.
正确
B.
错误
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举一反三
【简答题】听短文，完成下列句子，每空一词。短文读三遍。 1. This year, Mid-autumn Festival comes in ______. 2. Han Mei asked Lucy to eat moon cakes at her home after ______. 3. Lucy comes from ______. 4. Lucy ate _____ moon cakes at H...
【单选题】--- Both Li Lei and Han Meimei _______ fond of the TV program A Bite of China. ---- I am also deeply moved by its stories.
A.
is
B.
am
C.
was
D.
are
【简答题】农田、园林的喷灌装置一边喷水一边旋转,这是因为喷口的朝向稍有偏斜,水从喷口喷出时,弯管因反冲而旋转,这样可以自动改变喷水的方向。这里运用了 。(选填“动量守恒定理”或“动能定理”)
【单选题】Not only I but also Li Lei and Han Meimei ________ tired of so much homework every day. [ ]
A.
am
B.
is
C.
are
D.
was
【简答题】The palaces of Western Han were also very large in a_______.
【简答题】如何认识职业经理人的身份认同?
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