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【单选题】
关于桥式可逆斩波电路,下列说法错误的是A.
属于直接直流变流电路
B.
可以实现电动机的四象限运行
C.
电动机可以运行、二象限
D.
可以看作是由两个电流可逆斩波电路构成的
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【简答题】对正文品种、质量检定等有关的共性问题在《中国药典》的( )
【单选题】____________, they immediately left the house.
A.
Being heard the noise
B.
Hearing the noise
C.
They heard the noise
D.
They were hearing the noise
【简答题】Language, moreover, is a very public behaviour, so it is easy for different usages to be ______and ______.
【单选题】Hearing the noise outside, he hurried to _______ and went out.
A.
put on
B.
wear
C.
get dressed
D.
be dressing
【单选题】Moreover, the underlying message is that the family's language is not important.
A.
native
B.
intelligent
C.
direct
D.
chief
【单选题】Hearing the noise, all the birds flew ___every direction.
A.
in
B.
on
C.
to
D.
toward
【单选题】There is a kind of language which is often spontaneous and sentences are often incomplete, ungrammatical, and full of hesitations, false starts, and redundancies. If it is not recorded, spoken languag...
A.
spoken
B.
written
C.
body
D.
second
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