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2024-09-27 02:06:13 +08:00
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历届学生/18课程/class18/课程/2020-10-13/笔记.txt Normal file
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rem: 相对于浏览器html标签上的font-size来计算的
默认html上font-size： 16px
1rem == 16px
你写的rem * html font-size = 实际尺寸
为什么要用rem？？？
flex