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【单选题】
电路如图所示。已知: R c =R L =10kΩ,R e =5.1kΩ,R b1 =R b2 =2kΩ,+V CC =+24V,-V EE =-12V 。设 T1 和 T2 的 β 均为 60 , rbe 均为 1kΩ 。求 差模输人电阻 R id。A.
3 kΩ
B.
6 kΩ
C.
9 kΩ
D.
18 kΩ
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【单选题】Why does the man want a one-way ticket to New York?
A.
He will live in New York forever.
B.
He will not do business in Los Angeles.
C.
He can' t pay the round trip ticket.
D.
He hates Los Angeles and does not want to be here again.
【单选题】健康男子收缩压的参考值范围一般指
A.
所有健康成年男子收缩压的波动范围
B.
绝大多数正常成年男子收缩压的波动范围
C.
所有正常成年男子收缩压的波动范围
D.
少部分正常成年男子收缩压的波动范围
E.
所有正常人收缩压的波动范围
【单选题】After arriving in New York, the Chinese college student found it rather hard t ____ living on his own. [ ]
A.
rely on
B.
bring up
C.
depend on
D.
adjust to
【判断题】In New York, and in a couple of other cities in the U.S., the newspapers have ceased to play a significant role as a medium. ()
A.
正确
B.
错误
【简答题】A．The woman has a family of three grandchildren in New York. B．The woman enjoys going to the theatre with her friends. C．The man has several close friends in Florida. D．The man will live in New York f...
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