An obstruction on a helideck is any object that might present a hazard to the（）.<br>A:rotor blades and landing gear<br>B:unloading of passengers<br>C:loading of cargo<br>D:pilot's visibility

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

出自：海船船员证

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