发布网友 发布时间:2024-10-24 15:51
共2个回答
热心网友 时间:2024-11-07 06:38
In fact water resources on the earth are rather limited, even more limited than we realize. With the rapid increase of population and fast development of industries, water is more needed than before. At the same time, a large amount of water has been polluted and wasted every day. Some big cities in China axe facing the problem of water shortage already. There, water supply is controlled and industry has been restrained.热心网友 时间:2024-11-07 06:39
汗没空!你自己想