单项选择题
If you were being assisted by an icebreaker and he sent you the single letter Q，he would be telling you（）.
A.that he has his engines in reverse B.that he is shortening the distance between vessels C.to shorten the distance between vessels D.that his vessel is healthy
单项选择题 If you wear extra clothing when entering the water after abandoning ship it will（）.
单项选择题 If you shorten the scope of anchor cable，your anchor’s holding power（）.
单项选择题 If you saw flames aboard a vessel but could see the vessel was not on fire，you would know that the（）.
