单项选择题
A.4A,供出功率
B.4A,吸收功率
C.-4A,吸收功率
D.-4A,供出功率
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单项选择题
The section of each end of a barge which is heavily reinforced to take the pressure of pushing is called the ______.A.HeadlogB.TowheadC.Collision bulkheadD.Bullnose
A.A.Headlog
B.Towhead
C.Collision
B.Bullnose
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单项选择题
A.B.C.D.
A.
B.
C.
D.
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