单项选择题
A.extending out from a bluff alongside the river
B.that tends to give a false indication of its position
C.that has a sharp drop off into deep water
D.that is perpendicular to the current
单项选择题 A block and tackle is rove to advantage. This means that the（）.
单项选择题 A bilge suction line，in a fishing vessel with more than 16 individuals aboard，must have a strainer with an open area not less than how many times the open area of the suction line?（）
单项选择题 Limber is a term associated with（）.