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【单选题】
在压缩空气启动系统中，启动控制阀的作用是控制（）的开启和关闭。A.
空气分配器
B.
气缸启动阀
C.
空气压缩机
D.
主启动阀
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反馈参考答案：
举一反三
【简答题】职业健康监护(occupational health surveillance)
【简答题】The Occupational Safety and Health Administration (OSHA) was formed in 1971, and it was placed under the control of ______.
【简答题】职业病(occupational disease)
【单选题】For ______ football players, injuries are an occupational hazard which seems unaviodable.
A.
academic
B.
professional
C.
dramatic
D.
additional
【单选题】The main idea of this passage is that______.
A.
culture shock is an occupational disease
B.
culture shock is caused by the anxiety of living in a strange culture
C.
culture shock has peculiar symptoms
D.
it is very hard to cope with life in a new setting
【简答题】Hazar危害的定义
【简答题】职业病(occupational illness)
【简答题】职业病(occupational disease)
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