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【单选题】
电流型逆变电路交流侧输出电流波形为（）。A.
锯齿波
B.
正弦波
C.
矩形波
D.
三角波
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反馈参考答案：
举一反三
【单选题】— So, what brings you here?— I just want to ______________ (交一些朋友).
A.
made some friends
B.
make some friends
C.
makes a friend
D.
makes some friends
【单选题】He put up a map ___ the back wall because there was a hole ___ it. [ ]
A.
on; on
B.
at; in
C.
on; in
D.
on; at
【多选题】中国通过哪些方式，来广交朋友？（ ）What ways does China make friend ?
A.
讲信义 upholding faith
B.
重情义 valuing friendship
C.
扬正义 upholding justice
D.
树道义 establish morality
【判断题】Postman seems to think that euphemism first changes the name of a thing, to be followed by a changed attitude on the part of people toward the thing, and finally it changes the nature of the thing its...
A.
正确
B.
错误
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