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练习

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输了就该认30891

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// 选择<p>JavaScript</p>:

var js = document.getElementById('test-p');

// 选择<p>Python</p>,<p>Ruby</p>,<p>Swift</p>:

var arr = document.getElementsByClassName('c-red c-green')[0].children;

// 选择<p>Haskell</p>:

var haskell = document.getElementById('test-div').lastElementChild.lastElementChild;

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