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【单选题】
人机系统是由人和机器构成并依赖于人机之间相互作用而完成一定功能的系统。按照人机系统可靠性设计的基本原则，为提高可靠性，宜采用的高可靠度结构组合（ ）。A.
信息反馈、技术经济性、自动保险装置
B.
冗余设计、整体防护装置、技术经济性
C.
信息信号、整体防护装置、故障安全装置
D.
冗余设计、故障安全装置、自动保险装置
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反馈参考答案：
举一反三
【单选题】一 What a fine day! Shall we go picnicking? 一 _____. But we need to be home before six o'clock for the football match. [ ]
A.
Have a nice time
B.
Pardon me
C.
That's great
D.
You are right
【单选题】What a fine day! Shall we go picnicking? . But we need to be home before six o’clock for the football match.. ( )
A.
Have a nice time.
B.
Pardon me
C.
That’s great
D.
You are right
【单选题】What a fine day we are having today!______fishing in the park?
A.
How about go
B.
what about going
C.
why not going
D.
how to go
【单选题】What a fine day we are having today! ___boating in the park.
A.
How about go
B.
What about going
C.
Why not going
D.
How to go
【简答题】判定机械性窒息死，必须结合各种机械性窒息死的_____征象及_____综合分析判定。
【简答题】简述地铁火灾的特点
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