// 分别选择所有语言，所有动态语言，所有静态语言，JavaScript，Lua，C等:

//selected = $('div.test-selector li');

//selected = $('ul.test-lang li');

//selected = $('ol.test-lang li');

//selected = $('li.lang-javascript');

//selected = $('li.lang-lua');

//selected = $('ol>li.lang-c');

//selected = $('ol>li:first-child')

//selected = $('ol>li:last-child')

//selected = $('ol>li:nth-child(2)')