这是p元素
这是紧挨着p元素的第一个span元素
这是第二个span
显示为第一个span为红色。
4.兄弟选择符（E~F）
选择E元素之后的所有兄弟元素F，作用于多个元素，用~隔开。示例：
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原文地址：https://www.cnblogs.com/liuwei8882/p/5296100.html
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