单项选择题
If the current and wind are in the same direction，the sea surface represents a wind speed （）.
A.lower than actually exists B.higher than actually exists C.that actually exists D.that has no proportional relationship
单项选择题 If the current and wind are in opposite directions，the sea surface represents（）.
单项选择题 If help has not arrived in 10-12 hours after abandoning a vessel in a rescue boat，you should （）.
单项选择题 How should the lifeboat sea painter be rigged? （）
