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                ## CSS 選擇符有哪些? (1)id選擇器(#myid) (2)類選擇器(.myclassname) (3)標簽選擇器(div,h1,p) (4)后代選擇器(h1 p) (5)相鄰后代選擇器(子)選擇器(ul>li) (6)兄弟選擇器(li~a) (7)相鄰兄弟選擇器(li+a) (8)屬性選擇器(a[rel="external"]) (9)偽類選擇器(a:hover,li:nth-child) (10)偽元素選擇器(::before、::after) (11)通配符選擇器(*)
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