单项选择题
A.bridge B.shore side C.deck D.engine room
Please swing the derricks （）wharf side.A.toB.inC.atD.fo...
单项选择题Please swing the derricks （）wharf side.
A.to B.in C.at D.for
（）we swing the port derrick inboard?A.ShallB.AreC.IsD.B...
单项选择题（）we swing the port derrick inboard?
A.Shall B.Are C.Is D.Be
（）is the rate of discharging here?A.WhenB.WhyC.WhatD.Ei...
单项选择题（）is the rate of discharging here?
A.When B.Why C.What D.Either A or B
