單項選擇題Argon is classified as a().

A.corrosive
B.flammable gas
C.flammable liquid
D.nonflammable gas


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2.單項選擇題All of our export dangerous goods are()the standard.

A.on
B.over
C.up to
D.above of

3.單項選擇題All of our export dangerous cargo is()examined before shipment.

A.though
B.through
C.thorough
D.thoroughly

4.單項選擇題All handling and stowage of packaged hazardous materials on board a domestic vessel engaged in foreign trade shall be done under the supervision of().

A.a MSA Marine Inspector
B.an officer assigned to the vessel by MSA
C.a officer from CCS
D.the National Cargo Bureau