单选题:本质安全技术是指通过改变机器设计或工作特性,来消除危险或减小与危险相关的风险的保护措施,包括()。 (1)使用本质安全的

题目内容:
本质安全技术是指通过改变机器设计或工作特性,来消除危险或减小与危险相关的风险的保护措施,包括()。
(1)使用本质安全的工艺过程和动力源;
(2)控制系统的安全设计;
(3)提供自动反馈设备;
(4)遵循安全人机工程学的原则。 A.(1)(2)
B.(2)(3)(4)
C.(1)(3)
D.(1)(2)(4)
参考答案:
答案解析:

The two teachers taught him 30 years ago,but _____ of them c

The two teachers taught him 30 years ago,but _____ of them can recognize him now

查看答案

From the text we know when bananas are harvested, they are .

From the text we know when bananas are harvested, they are .A.green and pointing

查看答案

I´d like to ____ him to you for the job. He is very clever a

I´d like to ____ him to you for the job. He is very clever and capable.A.refer B

查看答案

One of the reasons why men invented certain sounds to expres

One of the reasons why men invented certain sounds to express thoughts and actio

查看答案