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    It was announced that Chinese scientists had been able to create chemical element that could fight cancer cells. A. 不填; 不填 B. the; a C. the; the D. 不填; a 【查看更多】

     

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    It was announced that ____ Chinese scientists had been able to create ____ chemical element that could fight cancer cells.

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

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