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【单选题】
测得工作在放大状态的某三极管两个电极的电流如下图所示,则管子的类型和β值为A.
NPN型管，β=41
B.
PNP型管，β=41
C.
NPN型管，β=40
D.
PNP型管，β=40
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举一反三
【简答题】试比较进程间的低级通信工具与高级通信工具
【简答题】股票有不同的分法，按照股东权益的不同可以分为（ ）。
【单选题】“Light travels faster than sound,” the teacher said.
A.
The teacher said that the light travels faster than the sound.
B.
The teacher said that the light travelled faster than the sound
C.
The teacher said that the light has travelled faster than sound.
D.
The teacher said that the light had travelled faster than sound.
【单选题】The teacher said, “What are you thinking about?”=The teacher asked me _______ thinking about.
A.
what were you
B.
what you were
C.
what I was
D.
what was I
【简答题】股票有不同的分法，按照股东权益的不同的可以分为（ ）。
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