单项选择题
A local wind which occurs during the daytime and is caused by the different rates of warming of land and water is a（）.
A.foehn B.chinook C.land breeze D.sea breeze
单项选择题 A line on a weather chart connecting places which have the same barometric pressure is called an（）.
单项选择题 A feature of an inflatable raft which helps keep people stationary in rough weather is（）.
单项选择题 A cold front moving in from the northwest can produce（）.
