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

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

 

A

考查動詞辨析。confirm證實(shí)；claim聲稱，斷言；conclude得出結(jié)論；calculate計算，估計。依語意：由觀察和實(shí)驗(yàn)得出的證據(jù)通常被用來證實(shí)科學(xué)理論，可知A項(xiàng)正確。

 

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