单项选择题
The operating cord on an inflatable liferaft also serves as a（）.
A.lifeline B.painter C.drogue D.marker
单项选择题 The most important thing to remember when launching an inflatable liferaft by hand is to（）.
单项选择题 The most important reason for taking anti-seasickness pills as soon as possible after entering a liferaft is to（）.
单项选择题 The limit switches on a ships survival-craft winch system（）.
