单项选择题
A sheepshank is used to（）.
A.keep a line from fraying B.join lines of unequal size C.stop off a line D.shorten a line
单项选择题 A sextant having an index error that is off the arc has a（）.
单项选择题 A DECK，SPACE，AREA，ETC.，NOT PERMITTED TO BE ENTERED FOR SAFETY REASONS defines（）.
单项选择题 The Vessel is fully fitted with cargo（）.
