题目内容

I remember that I met him a year ago.Iremember .

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After he left the office, he went home by car.After ,he went home by car.

I was afraid that I might hurt his feelings.I was afraid of .

单调可导函数的导函数必单调.

A. 对
B. 错

某投资方案计算期现金流量见下表，该投资方案的静态投资回收期为（）年。

A. 2.143
B. 3.125
C. 3.143
D. 4.125