單項(xiàng)選擇題During this season each year the visibility in the abovementioned area is（）.

A.poor
B.small
C.little
D.trifle


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1.單項(xiàng)選擇題Each fireman’s outfit and its spare equipment on a vessel must be stowed（）.

A.in a locked cabinet in the machinery space
B.in an unlocked cabine in the machinery space
C.in a separate and accessible location
D.at a fire hydrant location

2.單項(xiàng)選擇題Electric cargo winches have an overload safety device which normally cuts the current to the winch motor（）.

A.after torque cause line pull to exceed the rated capacity of the winch
B.before the line pull reaches the rated capacity of the winch
C.when the line pull reaches the breaking strengh of the fall
D.before the safe working load of the fall is reached

4.單項(xiàng)選擇題Every ship should hoist（）when approaching and entering ports.

A.its flashing light
B.the ship's name
C.its identification
D.its signal letters

5.單項(xiàng)選擇題Except in rare cases,it is impossible to extinguish a shipboard fire by（）.

A.removing the heal
B.removing the oxygen
C.removing the fuel
D.interrupting the chain reaction