Kort nozzles are installed around the propellers of some vessels to（）.<br>A:Increase the thrust of the propeller<br>B:Protect the propeller from striking sawyers<br>C:Prevent the propeller from striking barges towed on the ship<br>D:Prevent the propeller from touching bottom in low water

Kort nozzles are installed around the propellers of some vessels to（）.
A:Increase the thrust of the propeller
B:Protect the propeller from striking sawyers
C:Prevent the propeller from striking barges towed on the ship
D:Prevent the propeller from touching bottom in low water

出自：海船船员证

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