单项选择题
A drift lead indicates that the vessel is dragging anchor when the line is（）.
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 deepwell pump is a type of（）.
单项选择题 A bowline is used to（）.
单项选择题 A block that can be opened at the hook or shackle end to receive a bight of the line is a（）.
