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 “reaching” course is one in which the wind（）.
单项选择题 A “Mediterranean moor” should be used when（）.
单项选择题 A “loose” tow may cause all of the following EXCEPT（）.
