单项选择题

The damaged cargo is not allowed to export without（）.

A.repairing or replacing
B.to repair or to replace
C.being repaired or replaced
D.to be repaired or replaced

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单项选择题

The Certificate of Inspection of a damaged tank barge has expired. What certificate authorizes the barge to move to a repair facility for repair and inspection?（）

A.Application for Inspection
B.Change of Employment
C.Permit to Proceed
D.Temporary Certificate of Inspection

单项选择题

The “grip” of a joint represents the（）.

A.thickness of the connected members
B.diameter of the head
C.entire length of the rivet
D.diameter of the shank

单项选择题

Starting motors，generators，and other spark producing devices should be mounted as high above the bilges as possible to（）.

A.keep them dry when the bilges are full of water
B.keep them cool when the vessel is underway
C.make them more accessible for repairs
D.prevent accidental ignition of any gasoline vapors that may have accumulated in the bilges