单项选择题

A face line is used to（）.

A.prevent barge movement in a lock
B.secure two barges end-to-end
C.secure barges to the towboat
D.secure barges side-by-side

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单项选择题

A.taut and leading forward
B.slack
C.leading out perpendicular to the centerline
D.leading under the hull

单项选择题

A.screw pump
B.centrifugal pump
C.eductor
D.gear pump

单项选择题

A.join lines of equal size
B.form a temporary eye (loop) at the end of a line
C.be a stopper
D.keep a line from fraying