单项选择题
A.keep a line from fraying B.join lines of unequal size C.stop off a line D.shorten a line
A serving mallet is used in（）.A.covering wire or fiber ...
单项选择题A serving mallet is used in（）.
A.covering wire or fiber rope B.forcing fids into a line C.dogging hatches D.splicing lines
A rope ladder with wooden rungs is a（）.A.drop ladderB.l...
单项选择题A rope ladder with wooden rungs is a（）.
A.drop ladder B.life ladder C.Jacob's ladder D.jury ladder
A pelican hook（）.A.Can be released while under strainB....
单项选择题A pelican hook（）.
A.Can be released while under strain B.Is used for boat falls C.Is used for extra heavy loads D.Is used for light loads only
