65. A look-out should report objects sighted using ______.

Thoseroomshavebeen________to us. A: assured B: sighted C: signed D: assigned

We are all __________ to death of your complaints. A: ill B: disgust C: sick D: sighted

Some people are ready to connect UFO’s with the Bermuda Triangle because it’s said that more UFO’s have been sighted along ______ and ______ than in any other part of the world.

Why does the author mention the Flying Dutchman?___ A: as the basis of primitive navigation systems B: as an example of a commonly sighted phantom ship C: as the reason why many sailors have mental problems D: as an explanation for sightings of phantom ships

Though people have often laughed at stories told by seamen, it is now known that many of these “monsters” which have at times been sighted are simply strange fish. A: 原因状语从句 B: 条件状语从句 C: 让步状语从句 D: 时间状语从句

You should conduct a sector search under which of the following circumstances?( ) A: A.The search target is sighted and then lost B: B.More than one vessel is available for a search C: C.The search object is a target that will be readily detected by radar D: D.AN aircraft is available to assist a surface vessel