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Evidence obtained from observation and experiment is often used to________a scientific theory.

A.confirm     B.claim        C.conclude     D.calculate

 

A

 

考查动词辨析。confirm证实;claim声称,断言;conclude得出结论;calculate计算,估计。依语意:由观察和实验得出的证据通常被用来证实科学理论,可知A项正确。

 

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