题目内容

瓦斯积聚时浓度和体积为（）。

A. 0.5%，1m³
B. 1%，0.5m³
C. 1.5%，0.5m³
D. 2%，0.5m³

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更多问题

After received the “finished with engine” instruction, which of the following operations is false?（）

A. shut off the starting air receiver outlet valve
B. stop the FO priming transfer pump and shut off the correspondence inlet and outlet valve
C. stop the SW pump immediately and shut off the correspondence inlet and outlet valve
D. stop the FW pump immediately and shut off the correspondence inlet and outlet valve

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