单项选择题

The air cylinder bottles in the survival craft should be refilled with（）.

A.oxygen
B.nitrogen
C.compressed air
D.nitrogen and oxygen

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The (auto)ignition temperature is that temperature atwhich（）.

A.no spark or flame is required to ignite gas or vapor
B.a fuel begins to give off explosive vapors
C.a fuel if ignited will continue to burn
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A.clear syrupy liquid with no odor
B.colorless-to-brown liquid with a choking odor when hot
C.colorless liquid with a pleasant fruity odor
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Sometimes charter-party expressly prohibit the loading of dangerous goods，but sometimes a Charterer is entitled by an express term to load them provided that due notice is given （）.

A.to the master
B.the charterer
C.the merchant
D.receiver