请问这“个调查显示”是用“The research revealed that”还是The research has revealed that

请问这“个调查显示”是用“The research revealed that”还是The research has revealed that
请问这“个调查显示”是用“The research revealed that”还是The research has revealed that

请问这“个调查显示”是用“The research revealed that”还是The research has revealed that
两者都可以用,要结合语境的.比如,你是列举别人已做过的调查来论证你所说的,就用The research has revealed that .如果上文你简单陈述了调查,你可以用The research revealed that.

看你文章的具体语境。

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