单项选择题

评价一个计算机系统时,通常使用(1)来衡量系统的可靠性,使用(2)来衡量系统的效率。

A.平均响应时间
B.平均无故障时间(MTBF)
C.平均修复时间
D.数据处理效率
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单项选择题
W: What a surprise to see you at the supermarket! I thought you always ate in restaurants.M: The restaurants cost too much. I eat at home.Q: Where does the conversation most probably take place?()

A.At the supermarket.
B.In the restaurant.
C.In the man's home.
D.In the woman's home.

单项选择题
国际劳工组织通过的《生育保险公约》规定,生育妇女的生育保险待遇享受时间为()。

A.225天
B.217天
C.90天
D.84天

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