自然实验法的优点是( )A.减少人为性,提高真实性 B.减少人为性,降低真实性 C.提高人为性,增加真实性 D.提高人...

作者: tihaiku 人气: - 评论: 0
问题 自然实验法的优点是( )
选项 A.减少人为性,提高真实性 B.减少人为性,降低真实性 C.提高人为性,增加真实性 D.提高人为性,降低真实性
答案 A
解析 自然实验法的优点是减少人为性,提高真实性。

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