题目内容

The engine is started with () supplied from air receivers.

A. pressure oil
B. compressed air
C. pressure water

查看答案

搜索结果不匹配？点我反馈

更多问题

一个项目由可行性论证到投产运行,用人单位需要依次开展哪些职业病危害检测或评价工作？请分阶段阐述。

工业企业厂区总平面布置中生产区宜选在大气污染物扩散条件好的地段,布置在当地全年最小频率风向的下风侧。()

The generators on your ship have shut down，leaving you without navigation lights.Which emergency signal would you transmit over the VHF radio to alert vessels in the area of your predicament ().

A. Mayday，Mayday，Mayday
B. Pan，Pan，Pan
C. Security，Security，Security
D. Lights out，Lights out，Lights out

金属屏蔽是防护高频电磁场辐射的有效措施。()