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The research lacks evidence,and therefore,its conclusions are doubtful.

A.solid B.fierce C.severe D.potential

A

【解析】

试题分析:考查形容词辨析。A.可靠的,可信赖的 B.凶猛的,残忍的 C.严峻的,严厉的 D.潜在的,可能的。句意:这个研究缺乏可靠的证据,因此,它的结论是值得怀疑的。故选A。

考点:考查形容词辨析

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