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  • 科目:英语
  • 题型:单选题
  • 难度:较易
  • 人气:962

Chinese Vice-Premier called on Thursday for______ all-out effort to ensure ______ food and drug safety.

A.an; a B.an; 不填 C.the; the D.不填; the
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ChineseVicePremiercalledonThur