单项选择题
A.brightness of obtain B.color of targets C.shape of targets D.bearing of objects
The anchor was then（）and the siren sounded.A.aweighB.we...
单项选择题The anchor was then（）and the siren sounded.
A.aweigh B.weight C.weigh D.weighing
Are there many（）and warehouses in the port?A.wharfB.wha...
单项选择题Are there many（）and warehouses in the port?
A.wharf B.wharves C.wharve D.wharfs
The quartermasters（）steer the ship and help the officer...
单项选择题The quartermasters（）steer the ship and help the officer keep lookout.
A.duty B.on duty C.at duty D.in duty
