往一匹马身上放一根稻草，马毫无反应，倘若继续一根一根地添加稻草，最后一根稻草放到马身上后，马竟不堪重负瘫倒在地，这就是“稻草原理”。“稻草原理”体现的哲理是（ ）。
①事物的质变是量变的必然结果 ②质变是一种渐进的、不显著的变化
③事物的质变是由渐进的量变引起的 ④事物变化发展的实质是引起质变的量变

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