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【单选题】在对称三相四线制供电线路上，每相负载连接相同的灯泡（正常发光）。当中性线断开时，将会出现 （ ）
A.
三个灯泡都变暗
B.
三个灯泡都因过亮而烧坏
C.
三个灯泡有明有暗
D.
仍然能正常发光
【单选题】I admire my English teacher. I can remember very few occasions _____ she stopped working because of ill health. [ ]
A.
that
B.
when
C.
where
D.
which
【单选题】If it hadn’t been for the help of my English teacher, I the first prize in the English Writing Competition.
A.
would not win
B.
would not have won
C.
would win
D.
would have won
【单选题】对称三相四线制供电线路中,每相负载连接相同的灯泡(正常发光)。若断开A相,则出现的情况是()。
A.
A相灯泡不亮, B相灯泡比C相灯泡亮
B.
A相灯泡比B、C相灯泡都亮
C.
A相灯泡不亮, B、C相灯泡因过亮而烧毁
D.
A相灯泡不亮, B、C相灯泡亮度一样
【单选题】对称三相四线制供电线路中,每相负载连接相同的灯泡(正常发光)。若断开A相,则出现的情况是()。
A.
A 相灯泡不亮, B相灯泡比C相灯泡亮
B.
A 相灯泡比B、C相灯泡都亮
C.
A 相灯泡不亮, B、C相灯泡亮度一样
D.
A 相灯泡不亮, B、C相灯泡因过亮而烧毁
【单选题】Without the help of my English teacher, I _____ the first prize in the English speaking Competition. [ ]
A.
would win
B.
would have won
C.
would not win
D.
would not have won
【单选题】I enjoy listeningto Miss:: White my English teacher, ，I can only understand about half ofwhat she says,
A.
when
B.
because
C.
if
D.
though
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