单项选择题
A.icebreaker support is finished B.icebreaker support is commencing C.the icebreaker is icebound D.the icebreaker is beset
An icebreaker assisting a vessel through an ice field w...
单项选择题An icebreaker assisting a vessel through an ice field would display a visual signal consisting of the code letter “E” (Echo) to signify that “（）”.
A.I am altering my course to starboard B.I am altering my course to port C.I am operating astern propulsion D.My vessel is stopped and making no way through the water
An example of an anchor which has a stock is a（）.A.Bruc...
单项选择题An example of an anchor which has a stock is a（）.
A.Bruce anchor B.Dunn anchor C.Hook anchor D.Danforth anchor
An example of a grade C product is（）.A.naphtha，vm and p...
单项选择题An example of a grade C product is（）.
A.naphtha，vm and p B.tridecanol C.cottonseed oil D.camphor oil
