题目内容

● 某计算机系统由下图所示的部件构成，假定每个部件的千小时可靠度都为R ，则该系统的千小时可靠度为（2）。
（2）

A. R + 2R / 4
B. R + R2/ 4
C. R(1 ？ (1？ R )2)
D. R(1 ？ (1？ R )2)2

查看答案

搜索结果不匹配？点我反馈

更多问题

After they told each other the truth, both the woman and her son felt________ .
[A] despaired
[B] regretful
[C] justified
[D] grateful

听第10段材料，回答第17 ~20题。
‘17. What does the speaker do most probably？
[A]He's a teacher.
[B] He's a tour guide.
[C] He's a shop assistant.

[A] issue
[B] question
[C] task
[D] problem

[A] use
[B] write
[C] download
[D] fix