A.the higher
B.the lower
C.the faster
D.the slower
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A.ahead direction
B.astern direction
C.right-handed
D.left-handed
A.the propeller diameter
B.the propeller radius
C.the pitch angle
D.the length of helix
A.a helix
B.a helicoidal
C.a curve
D.a cone
A.a line
B.a circle
C.a helix
D.an epllicate
A.dependent
B.in dependent
C.in series
D.in parallel
最新試題
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To proceed to the assistance of a ship in distress is（）
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