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【判断题】
单相桥式整流电路中, 变压器次级绕组电压 U 2 =10V , 如果其中有一个二极管开路,则输出电压的平均值 U O = 6V。A.
正确
B.
错误
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【单选题】-----It’s hot. Would you mind my _____ the window? ------ _____.Do it as you like, please!
A.
to open; OK
B.
opening ;Certainly not
C.
closing; Of course
D.
open; Good idea.
【单选题】— Would you mind my coming over and having a look at your new garden? My little son's curious about those roses you grow. — _____. You're welcome. [ ]
A.
Yes, I do
B.
Not at all
C.
Never mind
D.
Yes, please
【单选题】— Would you mind my sitting here, Sir? — _____. It's for my wife. [ ]
A.
Not at all
B.
Certainly not
C.
I'm afraid you can't
D.
All right
【简答题】Zipper 的通过码是
【单选题】–It’s hot. Would you mind my __________ the air-conditioner? --__________. Do it as you like, please!
A.
turning on; Certainly not
B.
to turn; Not at all
C.
turning on; Of course
【简答题】Zipper 的通过码是
【简答题】Zipper 的通过码是
【单选题】--- It’s hot. Would you mind my__________ the window? ---- ____________. Do it as you like, please!
A.
to open; Ok
B.
opening; Certainly not
C.
closing; Of course
D.
open; Good idea
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