单项选择题
An advantage of using chain lashing on heavy vehicles aboard Ro-Ro vessels is that it（）.
A.has long life B.is light weight C.absorbs shock D.has fine adjustment
单项选择题 An advantage of the Christmas Tree towing method is to（）.
单项选择题 An “on-load” release system on a survival craft means the cable can be released（）.
单项选择题 An “atoll cloud” forming over an island due to heating of the land during the daytime would be which type? （）
