On a lifeboat equipped with Rottmer-type releasing gear，turning the releasing lever releases（）.<br>A:the painter<br>B:the after boat fall only if the boat is waterborne<br>C:both falls at the same time only if the boat is waterborne<br>D:both falls at the same time even if the boat has not reached the water

On a lifeboat equipped with Rottmer-type releasing gear，turning the releasing lever releases（）.
A:the painter
B:the after boat fall only if the boat is waterborne
C:both falls at the same time only if the boat is waterborne
D:both falls at the same time even if the boat has not reached the water

出自：海船船员证

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