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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1264

At night, plants _________carbon dioxide and at the same time _________oxygen. So, we may put some in our bedrooms to purify the air.

A.take in, give out B.take up, give off
C.take in, give in D.take off, give up
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Atnight,plantscarbondioxideand