单项选择题

两级放大电路的输入电阻与构成它的各单级放大电路的输入电阻之间的关系为。
A、正确
B、错误

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处理旅游安全事故最重要的依据是（）

A.旅游法律法规
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C.民法通则
D.交通法

单项选择题

To calculate the adjusted present value, one will: ( )

A．multiply the additional effects by the all equity project value.
B．add the additional effects of financing to the all equity project value.
C．divide the project's cash flow by the risk-free rate.
D．divide the project's cash flow by the risk-adjusted rate.