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【简答题】
放大器如图8所示,已知Ucc=12V,Rb=300kΩ,Rc=4kΩ,β=40,试求（1）画出直流电路通路并求 静态工作点：（2）画出微变等效电路：（3）计算输入电阻r1,和输出电阻r0；（4）电压放大倍数Au
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举一反三
【单选题】I was shocked by the ? of clothing in the department store. You could buy whatever you wanted.
A.
kind
B.
type
C.
sort
D.
variety
【单选题】I was shocked by the conditions in the factory, which ( ) definite health and safety hazards.
A.
constituted
B.
masked
C.
enclosed
D.
consolidated
【简答题】患者,女性,28岁。左股骨干骨折后进行骨牵引,护士帮助其洗发时对水温及室温的要求是( )
【单选题】I was shocked by the extreme ____ that I saw in the village.
A.
poor
B.
poverty
C.
novelty
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