单项选择题
A.stored safely in a cool dark non-ventilated area until work is completed
B.resealed and returned to a well ventilated area after each use
C.covered at all times to protect from ignition sources
D.stored in a suitable gear locker
单项选择题 On a class “B” fire，which portable fire extinguisher would be the LEAST desirable?（）
单项选择题 MTIME PLS B NOTED MY VSL NEEDS TO TAKE PROVISIONS AND BUNKERS SOON AFTER HER BERTHING ALONGSIDE. This fax indicates that（）.
单项选择题 Fire protection regulations for towing vessels require training in all of the following，EXCEPT（）.