3个可靠度R均为0.8的部件串联构成一个系统,如图1-19所示。则该系统的可靠度为()。
A.0.240
B.0.512
C.0.800
D.0.992
参考答案:B
— John, how did your English exam go?
— I thought I ____, but in fact I came in the top 10% in the class.[ ]
A. should have failed
B. couldn' t have failed
C. might have failed
D. mustn' t have failed
系统盘和数据盘哪一个支持从云主机上卸载()。
A、只有系统盘支持
B、只有数据盘支持
C、两个都支持
D、都不支持