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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                #### 1.6.3 css3結構選擇器 **:nth-child** 選擇指定索引處的子元素 **:nth-child(n)** 父元素下的第n個子元素 **:nth-child(odd)** 奇數子元素(同nth-child(2n-1)) **:nth-child(even)** 偶數子元素(同nth-child(2n)) **:nth-child(an+b)** 公式 (nth-child從1開始) **:nth-last-child(n)** 倒數第n個子元素 **:nth-of-type(n)** 父元素下的第n個指定類型的子元素 **:nth-last-of-type** 父元素下的倒數第n個指定類型的子元素 **:first-child** 選擇父元素下的第一個子元素 **:last-child** 選擇父元素下的最后一個子元素
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                              哎呀哎呀视频在线观看