单项选择题
A.percentage of frequency of wave heights B.percentage of poor visibility conditions C.sea surface temperatures D.amounts of precipitation
Air temperature varies with（）.A.the altitude above sea ...
单项选择题Air temperature varies with（）.
A.the altitude above sea level B.the season of the year C.the latitude or distance from the equator D.All of the above
After a liferaft is launched，the operating cord（）.A.ser...
单项选择题After a liferaft is launched，the operating cord（）.
A.serves as a sea painter B.detaches automatically C.is used to rig the boarding ladder D.is cut immediately as it is of no further use
Advection fog may be formed by cold air passing over a（...
单项选择题Advection fog may be formed by cold air passing over a（）.
A.colder sea surface B.warmer sea surface C.dry coastal plains D.high mountain or plateau
