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

单项选择题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
D.a 1% mixture of the fuel with air will explode

单项选择题Sulfuric acid is a（）.

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
D.whitish liquid with a faint，pleasant odor

单项选择题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

单项选择题Raw lacquer is（）corrosive nature．

A.in
B.of
C.on
D.with

单项选择题Persons engaged in the transport of dangerous goods shall（）training in the contents of dangerous goods requirements commensurate with their responsibilities.

A.have
B.make
C.take
D.receive