单项选择题
Pinching of the cargo hose between the vessel and the dock should be prevented by（）.
A.adjusting the hose supports B.laying out an excess length of hose on deck C.tying off the topping lifts and runners to winch heads D.All of the above
单项选择题 Our starboard derrick boom of hatch No.4 is badly cracked（）that it has become entirely useless.
单项选择题 Our ship is more than 150 meters in（）.
单项选择题 Our jumbo boom can（）20 tons.
