單項(xiàng)選擇題

The certificate shall have effect （） all Chinese ports.

A.to
B.for
C.in
D.on

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The certificate will remain in force （）July lst,2008.

A.in
B.on
C.till
D.to

單項(xiàng)選擇題

The International Loadline Certificate is a document indicating （）of the various loadlines of the vessel.

A.functions
B.importances
C.actions
D.positions