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單項(xiàng)選擇題

Vapor given off by a flammable liquid will burn when ignited provided（）

A.the vapor and air mixture is too rich
B.it is mixed with certain proportions of air
C.the vapor is too little compared to the air
D.it is of heavy toxicity

你可能感興趣的試題

單項(xiàng)選擇題

Fixed piping leads from the（）to various areas of the compartment to be flooded.

A.manifold
B.remote pull box
C.discharge nozzle
D.machinery space

單項(xiàng)選擇題

When the ship is under attack by pirates,or terrorists,（）needs to be activated.

A.AIS
B.SSAS
C.SSP
D.SART

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Vapor given off by a flammable liquid will burn when ignited provided（）

你可能感興趣的試題

Fixed piping leads from the（）to various areas of the compartment to be flooded.

When the ship is under attack by pirates,or terrorists,（）needs to be activated.

99色精品-9色在线-99色在线-99色视频国产欧美日产一区二区三区_亚洲精品亚洲人成在线观看_四虎在线精品永久观看_免费一级a一片久久精