题目内容
(请给出正确答案)
[主观题]
A Kort nozzle is a(n) ______.A.hollow tube surrounding the propeller used to improve thrus
A Kort nozzle is a(n) ______.
A.hollow tube surrounding the propeller used to improve thrust
B.nozzle attached to a firefighting hose
C.intake valve on a diesel engine
D.piston cylinder on a diesel engine
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