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【判断题】
在纯电容电路中，电压在相位上滞后电流π/2。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】It turned out why the tiger got out of the cage because the man in charge had forgot to lock it.
A.
It turned out
B.
why
C.
got out
D.
forgot
【单选题】—Who left the door open? — Oh, sorry. I _____ the door.
A.
ought to lock
B.
should lock
C.
ought to have locked
D.
could lock
【单选题】He went into the room and _______ the door. A. cking lock B. lo C. locks D. locked
A.
lock
B.
locking
C.
locks
D.
locked
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