理想的集成运放电路输入电阻为无穷大,输出电阻为零。( )
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理想运放构成线性应用电路时,电路增益与运放本身参数无关。( )
A. 对
B. 错
理想运放中“虚地”表示两输入端对地短路。( )
A. 对
B. 错
_______ ,she found herself in a different world.
A. To her much surprise
B. Much to surprised her
C. To her surprise much
D. Much to her surprise
What do you have ________ breakfast?
A. To
B. about
C. for
D. At
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