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閱讀理解：
"Scientific conservatism suggests that a biological explanation should be the last choice after all non-biological explanations are addressed,"Allen said."We have a lot of work to do to rule out （排除……的可能性)possible non-biological explanations.It is more likely that a chemical process,without biology,can explain these results."
What can be inferred from what Allen said?
A.Scientists have different arguments over whether there is life on Titan.
B.Scientists all agree that there is life on Titan.
C.Scientists all suggest that a biological explanation is reasonable.
D.Scientists all agree that a non-biological chemical reaction is a possible explanation.
正確答案：A
答案解析：推理判斷題。答題原則：和原文完全一樣的選項肯定不是答案，推理判斷題是對現(xiàn)象的推斷。題目中有絕對詞語all must every merely have to barely only一般是錯誤的，排除B C D.根據(jù)Scientific conservatism suggests that a biological explanation should be the last choice after all non-biological explanations are addressed.推斷出科學(xué)家就Titan上是否有生命的的問題觀點不同，與A一致。得到答案A.
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