以下应采用铜芯线缆的工程或场所有()。
A.人防工程
B.爆炸性气体环境的2区
C.爆炸性粉尘环境的11区
D.住宅套内
参考答案:A, D
Your vessel is equipped with a fixed C02 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?().
A.Use the C02 system and evacuate the engine room
B.Use the fire main system and evacuate the engine room
C.Evacuate the engine room and use the C02 system
D.Evacuate the engine room and use the fire main system
箭头所指的解剖结构是()
A.砧骨
B.锤骨
C.镫骨
D.卵圆窗
E.圆窗