
2个回答
展开全部
Water is the "life blood" of our earth.It is in every living thing.It is in the air.It runs through mountains and valleys.It forms lakes and sea.Nature has a great water system.Rainwater finds its way to rivers and lakes.River water runs into the sea.At the mouths of the rivers,fresh water joins the salt water of the sea.Here at the mouth of a river there are a lot of important plant and animal lives.But pollution sometimes destroys them.We have to clean our rivers.Man has to work with nature,not against it.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询