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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 中等
  • 浏览 1438

       form the moon, our earth with water        .seventy percent of its surface, appears as a blue ball.

A.seen, covered B.seeing, covering
C.seen, covering D.seeing, covered
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相关知识点

formthemoon,ourearthwithwater.