http://www.***.com/images/6/6d/Earth_Global_Circulation.jpg
http://vipftp.eku.cc/vrw/sc/sctx/340474144620.JPG
http://edu.n318.com/gz/tbctk/g1/xkbg1dl/200606/215769.html
http://www.***.com/UpFiles/BeyondPic/200611/20061116233606639.jpg
http://www.***.com/jxyl/sztb/zr/dl_g3/tbjx.htm