单项选择题
A.derrick B.crane C.jumbo boom D.boom
（）cargo is unloaded by huge grabs on cranes or by large...
单项选择题（）cargo is unloaded by huge grabs on cranes or by large grain elevators.
A. Dry B. Dry general C. Dry bulk D. Liquid
At the discharging port, tankers pump the oil ashore us...
单项选择题At the discharging port, tankers pump the oil ashore using （）.
A. shore pumps B. her own pumps C. large pumps D. large tubes
At the （）port, tankers pump the oil ashore using her ow...
单项选择题At the （）port, tankers pump the oil ashore using her own pumps.
A.discharging B.load C.loading D.charging
