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5. The author implies that scientists develop a healthy skepticism because they are aware that

A、

mathematicians are better able to solve problems than are scientists.
B、

changes in axiomatic propositions will inevitably undermine scientific arguments.
C、

well-defined situations are necessary for the design of reliable experiments.
D、some factors in most situations must remain unknown.
喵查答案:some factors in most situations must remain unknown.

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