复利计息时，几个计息周期后的本利和是( )。
A．Fn＝P·n·i
B．Fn＝P(1+i·
C．Fn＝P[(1+n-1)
D．Fn＝P(1+n
参考答案：D
— I think smoking is bad for your health. You see the sign "No Smoking" there.
— Yes, I know. But I simply can't _____. [ ]
A. give it away
B. give it in
C. give it out
D. give it up
发生机器设备事故主要有哪几方面的原因？
