单项选择题
Transverse movement of cargo, especially bulk, caused by rolling or a heavy list defines（）.
A.shifting cargo B.moving cargo C.removing cargo D.trimming cargo
单项选择题 What is your latest tropical storm warning（）?
单项选择题 When a wind is permanently changing the direction from which it blows, it is（）.
单项选择题 When it is advisable to remain on VHF channel 14 you should say（）.
