单项选择题
A.moon B.satellite C.sextant D.radar
Their task is to（）（驾驶） the ship safely.A.navigateB.oper...
单项选择题Their task is to（）（驾驶） the ship safely.
A.navigate B.operate C.takeover D.drive
Keep the vessel to the （）(中间)of the channel.A.portB.mid...
单项选择题Keep the vessel to the （）(中间)of the channel.
A.port B.middle C.head D.front
The after part of a ship is called（）(船尾) .A.headB.tail...
单项选择题The after part of a ship is called（）(船尾) .
A.head B.tail C.stern D.quarter
