问题
单项选择题
一个由单元A、单元B、单元C组成的串联系统，其寿命服从指数分布，3个单元的故障率分别为λA=0.0006/h，λB=0.002/h，λC=0.0005/h，则：
其系统的可靠性方框图应该为（）。
A.A
B.B
C.C
D.D
答案
参考答案：A
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一个由单元A、单元B、单元C组成的串联系统，其寿命服从指数分布，3个单元的故障率分别为λA=0.0006/h，λB=0.002/h，λC=0.0005/h，则：
其系统的可靠性方框图应该为（）。
A.A
B.B
C.C
D.D
参考答案：A
| 阅读理解。 | ||||||||||||||||
| Jane is a girl. She likes basketball and action movies. Her favorite basketball player is Yao Ming and her favorite movie actor is Jackie Chan. She knows something about them.
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| 1. Is Yao Ming a basketball player? _________________________________ 2. When is Yao Ming's birthday? _________________________________ 3. Who is Jackie Chan? _________________________________ 4. Where is Jackie Chan from (来自)? _________________________________ 5. Does Jackie Chan like listening to music? _________________________________ |