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作业

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#1 Created at ... [Delete] [Delete and Lock User]
//所有语言
selected = $('.test-selector li')  
//所有动态语言
selected = $('ul.test-lang li')  
//所有静态语言
selected = $('ol.test-lang li')  
//选择JavaScript
selected = $('ul.test-lang li.lang-javascript') 
//选择Lua
selected = $('ul.test-lang li.lang-lua') 
//选择C 
selected = $('ol.test-lang li.lang-c')

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