单项选择题
A.unbalanced rudders B.balanced rudders C.contraguide rudders D.straight rudders
While reading the station bill, you find "three (3) sho...
单项选择题While reading the station bill, you find "three (3) short blasts on the whistle and three (3) short tings on the general alarm bells," this signal is for （）.
A.abandon ship B.dismissal from fire and emergency stations C.fire and emergency D.man overboard
Hydrocarbon vapors are usually detected by the use of t...
单项选择题Hydrocarbon vapors are usually detected by the use of the （）.
A.flame safety lamp B.combustible gas indicator C.gasometer D.oxygen indicator
A fire involving trash and paper waste would be classif...
单项选择题A fire involving trash and paper waste would be classified as a （）.
A.class A B.class B C.class C D.class D
