老师
Hello, everyone. It's pleased to see you again. Have you ever heard of that? The earth is hungry? There are too many people in the world. We have to find food for about 375000,840 Newborn babies every day. Maybe you don't know that the earth even thirtieth Thursday, coke down.
老师
While nearly three fourths of the earth is covered with water, we are still short of drinking water, nearly. Jinhu Jiangjian, let's read the following passage and put the paragraph in the correct order. The sea seems to have the best answer. There is plenty of water in the sea. We need to take the salt away from the seawater. This is a very expensive. If scientists can find cheaper ways to do it, we can solve problem of the shortage a water. How can we avoid a serious water shortage?
老师
1St, we should save water and not waste it. 2Nd, we should protect our water resources and not pollute them. 3Rd, we should discover ways to reuse water. Scientists have made some progress in this field. Today, some large查看隐藏内容