1.The shopping mall is 10km_____ of our school.
A.south B.southern C.the south D.of south
2.-What's in the bag?
-_____
A.Nothing B.No one C.Nobody D.None
煤干馏属于什么变化?石油蒸馏属于什么变化?
两天内回答的可加分，一定要分析一下！