根据水龙头口径可计算面积!水流速度是10 m/s!可看看作是1 s内流出的水柱长为10 m,
分析:由水龙头出水口的直径可以计算出水龙头出水口的面积,
已知流速和运动时间可以求出浪费水的体积。
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中国是一个严重缺水的国家 用英语怎么说
1!China is a country with serious water shortage,
2。China is a country which is urgently lack of water.
3!China is already suffering from acute water shortages。