单项选择题
A.-1
B.-2
C.1
D.3
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单项选择题
A deck fitting,used to secure line or wire rope,consisting of a single body with two protruding horns is called a ______.A.BittB.BollardC.CapstanD.Cleat
A.A.Bitt
B.Bollard
C.Capstan
D.Cleat
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单项选择题
A.-0.8sinωtVB.-0.5sinωtVC.-0.4sinωtVD.-0.25sinωtV
A.-0.8sinωtV
B.-0.5sinωtV
C.-0.4sinωtV
D.-0.25sinωtV
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