单项选择题

A ship is side to be（）when the bow and stern rise and fall with the oncoming waves.

A.rolling
B.pitching
C.heaving
D.swaying

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单项选择题

A.general cargoes
B.dry bulk cargoes
C.hazadous cargoes
D.manufactured goods of large size

单项选择题

A.fragile or expensive cargoes
B.raw materials
C.finished metallic products
D.manufactured goods of large size

单项选择题

A.raw metallic products
B.finished metallic products
C.consumable products
D.Manufactured goods of large Size