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0704css作业
杨发国的博客
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作业1，写一个盒子

1.png



3.png


4.png




tou

6.png

学习心得：

css选择器的优先级：内链样式>ID>class>tag;

常用选择器归纳：

元素选择器：p

层级选择器：ul li

ID选择器：#

类选择器：.

属性选择器：li【id】

群组选择器：用逗号连接#bg-blue，.bg-green

相邻选择器：+

任意一个选择器：ul:nth-child（6）

类型选择器：ul p:first-type

伪类选择器：form ：enabled

备注：选择器中序号的表达：头first；尾：last；任意的中间值用nth

Correction status：qualified

Teacher's comments：盒模型与css选择器, 非常常用的, 而且盒模型也不止一种, 多看看手册
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