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【单选题】
电压互感器实质上是一个 :A.
电焊变压器
B.
降压变压器
C.
升压变压器
D.
自耦变压器
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反馈参考答案：
举一反三
【单选题】It was foolish of him to ______ his notes during that important test, and as a result, he got punished.
A.
stickto
B.
referto
C.
keepto
D.
pointto
【单选题】如图所示的电流叠加相复励自励调压装置的单线原理图。若空载分量iv适度,但复励分量ii太弱,则_____。
A.
空载电压偏高
B.
发电机外特性上翘
C.
发电机外特性下斜
D.
空载电压偏低
【单选题】如图所示的电流叠加相复励自励调压装置的单线原理图：若发电机带载后，当保持发电机输出电流大小不变，功率因数降低时，则______。
A.
If不变
B.
If增大
C.
If减小
D.
If增大或减小
【单选题】It is not easy to give away money______it is to make money.
A.
as
B.
more than
C.
as much as
D.
any more than
【单选题】听力原文：M: Clara! How are you? I haven't heard from you for at least three years. What are you doing? W: I came back from Australia. Now I've opened a company. I heard from Miss Sue that you are getting ...
A.
More than three years.
B.
Less than three years.
C.
Three years.
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