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單項(xiàng)選擇題

An obstruction on a helideck is any object that might present a hazard to the（）.

A.rotor blades and landing gear
B.unloading of passengers
C.loading of cargo
D.pilot's visibility

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單項(xiàng)選擇題

AN ILLNESS PREFERABLY OF AN INFECTIOUS NATURE SEIZING MORE THAN TWO PERSONS ON BOARD AT THE SAME TIME defines（）.

A.Disease of Crew
B.Crew illness
C.Group illness
D.Mass disease

單項(xiàng)選擇題

Aboard a survival craft，ether can be used to（）.

A.start the engine in cold weather
B.aid in helping personnel breathe
C.prime the sprinkler system
D.prime the air supply