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  • 更新 2022-09-03
  • 科目 英语
  • 题型 单选题
  • 难度 较易
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     CT is really     useful invention, with which doctors can find out what's wrong with a patient more easily.

A.A; a B.The; an C.The; a D.A ;the
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CTisreallyusefulinvention,with