68.When the serious infectious disease began to spread, medical _______ worked hard to find out a cure.
(A) requirements
(B) remedy
(C) researchers
(D) requirements

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答案：C
難度： 簡單

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	pretest 高三下 (2016/12/03) (A) requirements 要求 ★★(☆) ... (內容隱藏中) 查看隱藏文字

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