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【多选题】
电力电子器件按照开通、控制方式可分为 、 和 三大类。A.
不可控型
B.
半控型
C.
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反馈参考答案：
举一反三
【单选题】He lay in bed, with his eyes ______ up at the ceiling and his fingers ______.
A.
looked; crossing
B.
looking; crossing
C.
looking; crossed
D.
looked; crossed
【单选题】He ______ on the bed_____ to his parents that blackbirds had_____ their eggs on Mars.
A.
lay; lying; lied
B.
lied; lied; lied
C.
laid; laid; laid D lying; lied; laid
【单选题】设有如下定义: int a=10; int b=4; 则语句 : Console.WriteLine( "{0}" ,a/b) 的输出结果是
A.
2.5
B.
2
C.
3
D.
4
【单选题】_________working all day long, he fell asleep as soon as he lay on the bed.
A.
Getting tired of
B.
Getting tired from
C.
To get tried of
D.
To get tired from
【单选题】_____ on the bed , he _____ to his parents that blackbirds had_____ their eggs on Mars. [ ]
A.
lay; lying; lied
B.
lied; lied; lied
C.
laid; laid; laid D lying; lied; laid
【单选题】The old teacher lay wide awake on his bed, ___________ all the problems he had to deal with the next day.
A.
thought about
B.
to think about
C.
thinking about
D.
having thought about
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