单项选择题
A.2.5Ω
B.2.5∠40Ω
C.2.5∠80Ω
D.40∠80Ω
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单项选择题
A.B.C.D.
A.
B.
C.
D.
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单项选择题
On a vessel with a single propeller,transverse force has the most effect on the vessel when the engine is put ______.A.full aheadB.full asternC.half aheadD.slow astern
A.A.full
B.full
C.half
D.slow
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