the officials have been weighing plans to pipe in water from Wales.

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• the officials have been weighing plans to pipe in water from Wales.
• 英语翻译We all have to learn how to stop wasting our limited water.One of the steps we should take is to find ways of reusing it.Experiments have already been done in this field.Today in most large cities,fresh water is used only once,then it runs into waste system.But it is possible to pipe the used water to a purifying factory.There it can be filtered and treated with chemicals so that it can be used again,just as it were fresh from a spring.But even if
• 关于weigh的问题,It weighs six tons.= ___ ___ is six tons.= It's six tons __.
• 下列物质中不含氢键的是（）A.HF B.H2O C.NH3 D.CH4