【多选题】【消耗次数：1】
下列关于韦伯定律的描述正确的有（ ）。
①
说的是刺激物的变化量与原刺激物之间的比值是一个常数
②
说的是心理量与刺激物的物理量的比值是一个常数
③
公式表示为：△I/I=K
④
公式表示为：I/△I=K
参考答案：
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