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【单选题】
试比较共射、共集和共基三种组态的放大电路,其中输入电阻较小的是A.
共射放大电路
B.
共集放大电路
C.
共基放大电路
D.
共基和共集放大电路
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举一反三
【单选题】1996年全国人大修订的(),规定“国家安全机关依照法律规定,办理危害国家安全的刑事案件,行使与公安机关相同的职权。”
A.
«国家安全法»
B.
«刑事诉讼法»
C.
«反间谍法»
D.
«国家情报法»
【单选题】A: I have an appointment to see Dr. Gram for a physical examination. B: ______.
A.
Could you come another time? Dr. Gram is not available right now.
B.
I'm afraid you've got to make another appointment.
C.
Dr. Gram is busy. She has just been. appointed Director of the clinic.
D.
Please have a seat. She is in surgery right now.
【单选题】(2013·北京，26)I have an appointment ________ Dr.Smith, but I need to change it.
A.
to
B.
off
C.
with
D.
from
【简答题】阅读理解。 I had been to several doctors as a child, but I have a special place in my heart for Dr. Vincent. He was a Pediatric Cardiologist at UCLA back in 1971 who saved my life. I was eight years old at...
【简答题】I had been to several doctors as a child, but I have a special place in my heart for Dr. Vincent. He was a Pediatric Cardiologist at UCLA back in 1971 who saved my life. I was eight years old at the t...
【简答题】物体只受一个力作用时,它一定不能处于 状态或 状态。
【单选题】I have an appointment ________ Dr.Smith，but I need to change it. (2013·北京，26)
A.
to
B.
off
C.
with
D.
from
【单选题】Shall we all drive to the party________ so we don’t get lost?
A.
all at once
B.
in convoy
C.
in a convoy
D.
together
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