单项选择题
A feature of an inflatable raft which helps keep people stationary in rough weather is（）.
A.lashings on the floor of the raft for the passenger's feet B.straps from the overhead C.lifelines on the inside of the raft D.ridges in the floor of the raft
单项选择题 A cold front moving in from the northwest can produce（）.
单项选择题 （）rain means it rains in some parts of the area.
单项选择题 （）moving rather quickly east expected 150 miles south of Cape Farewell 972 by 160000 GMT.
