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【单选题】
如图电路中,VC=-12 V,VA=+3 V,VB=0 V。设二极管正向管压降为0.5 V,则VF=______ V
A.
+2.5 V
B.
+3.5 V
C.
+0.5 V
D.
-0.5 V
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参考答案:
举一反三
【单选题】You can the program your radio very clearly. [     ]
A.
pick up;in
B.
take up;on
C.
pick up;on
D.
make up;over
【判断题】形成露时的露点温度在零上,出现霜时的露点温度在零下。
A.
正确
B.
错误
【简答题】People with disabilities make up a large part of the population. It is estimated that over 35 million Americans have physical, mental, or other disabilities. About half of these disabilities are “deve...
【判断题】形成露时的露点温度在零上,出现霜时的露点温度在零下。
A.
正确
B.
错误
【多选题】在介绍来宾、引导客人时的常用手势有( )
A.
横摆式
B.
斜臂式
C.
直臂式
D.
曲臂式
【单选题】When you go to the interview, make sure that you
A.
are over-confident.
B.
can make up your mind in four minutes.
C.
are dressed in suitable attire.
D.
do not arrive too early.
【单选题】When you go to 'the interview, make sure that you
A.
are over-confident.
B.
can make up your mind in four minutes.
C.
are dressed in suitable clothes.
D.
do not arrive too early.
【单选题】They plan to ____ a new bridge over the river. [     ]
A.
set up
B.
come up
C.
make up
【简答题】People with disabilities make up a large part of the population. It is estimated(估计) that over 35 million Americans have physical, mental, or other disabilities. About half of these disabilities are “...
【单选题】系统特性中有效的管理总能带来1+1>2的效果是指系统的( )
A.
控制性
B.
目的性
C.
整体性
D.
开放性
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