单项选择题
A sail hook is used for（）.
A.hoisting a windsail B.parceling C.sewing canvas D.testing canvas
单项选择题 A safety feature provided on all inflatable liferafts is（）.
单项选择题 A note of protest is a declaration made by the Master of a vessel before a notary public.Its purpose is to（）.
单项选择题 A master would be well advised to note a sea protest if（）.
