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【单选题】
脚气病是由于缺乏哪种维生素引起( )A.
维生素 B1
B.
维生素 B2
C.
维生素 C
D.
维生素 PP
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举一反三
【简答题】完形填空。 A duck(鸭子) and a hen (母鸡) meet on the road. The duck asks the hen, ' 1 do you work?' The hen answers , ' 2 a farm. ' The duck says , Then you are a 3 . ' ' No, I'm a worker. I make eggs. What 4 ...
【单选题】Not always __________they want to.
A.
people can do what
B.
people cannot do what
C.
can people do what
D.
can' t people do what
【简答题】共源极场效应管放大电路,其输出电压与输入电压 ;共漏极场效应管放大电路,其输出电压与输入电压 。 A .同相 B .反相
【单选题】Do you think there will be robots __________ ? [ ]
A.
in people’s homes
B.
in people homes
C.
at people's homes
D.
at people homes
【单选题】(场效应管放大电路)共源极场效应管放大电路,其输出电压与输入电压 ;共漏极场效应管放大电路,其输出电压与输入电压 。
A.
同相，同相
B.
反相，反相
C.
同相，反相
D.
反相，同相
【单选题】hen a population is said to be aging,
A.
more people are retiring than people entering the workforce
B.
the birth rote is growing
C.
there is an oversupply of workforce
D.
young people outnumber old people
【简答题】W hen we praise the Chinese leadership and the people, we are not merely being polite.英译汉
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