400-600-1123
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答案：
C
美国总统T
前5天症状像arsenic 中毒。然而，近来检查T的骨头，表明arsenic含量和同龄人相当。这含量远低于经历致命arsenic中毒的人活的骨中arsenic 含量（这些人活了一天多）
结论题
(A) T的症状不是arsenic 中毒；无根据推理，排
(B) T的死不是中毒结果；无根据推理，排
(C) T的死前5天症状不是致命arsenic 导致；符合逻辑链，正确
(D) T的最后5天每天症状都加重；无根据推理，排
(E) 致命arsenic中毒超过一天不正常；无根据推理，排 
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