精选优质文档-倾情为你奉上1.【2014年内蒙古通辽市中考】The world is not only hungry, it will also be thirsty for water. About 97% of water on the earth is sea water, or salty water. Man（人类） can only drink or use the other 3% of the fresh water which comes from rivers, lakes and underground.The sea is very big. Look at the map of the world, there is more sea than land. It covers about three quarters of the earth, it looks very beautiful when the sun is shining on it. But it can be terrible when there is a str
