某产品由5个单元组成串联系统,若每个单元的可靠度均为0.95,该系统可靠度为( ) 发布时间:2018-07-17 03:16 │ 来源:www.tikuol.com 题型:单项选择题 问题: 某产品由5个单元组成串联系统,若每个单元的可靠度均为0.95,该系统可靠度为( )。A.0.77B.0.87C.0.97D.0.67
题型:单项选择题 It’s wrong _____ you _______ the disabled people.A.for; to laughB.of ; to laughC.of ; to laugh atD.for; to laugh at 查看答案