All of our export dangerous goods are（）the standard.

All of our export dangerous cargo is（）examined before shipment.

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

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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

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