2. 外语
  3. A great deal research is being carried out all over the world____________(为了我到解决缺水的办法)

A great deal research is being carried out all over the world____________(为了我到解决缺水的办法)

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问题 A great deal research is being carried out all over the world____________(为了我到解决缺水的办法)
选项
答案to find a solution to water shortage
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大学英语四级

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