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【单选题】

______ sCiEntists to DEvElop A vACCinE For thE BirD Flu virus, thEy CoulD potEntiAlly hElp sAvE millions oF livEs.
(A) iF
(B) shoulD
(C) wErE
(D) unlEss

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根据网考网移动考试中心的统计,该试题:

9%的考友选择了A选项

10%的考友选择了B选项

76%的考友选择了C选项

5%的考友选择了D选项

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