单项选择题

加测速反馈改善系统动态性能的机理是（）

A．开环增益增加；
B．阻尼比增加；
C．阻尼比减小；
D．开环增益减小。

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单项选择题

Which of the following can be described as involving indirect finance? A.
You make a loan to your neighbor. B.
You buy a U.S. Treasury bill from the bank. C.
You buy a U.S. Treasury bill from the U.S. Treasury. D.
A corporation buys a short-term security issued by another corporation.

定额有利于推广先进的施工技术和工艺。
正确
错误

答案：正确