// 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.querySelectorAll('.c-red.c-green >p');
// 选择<p>Haskell</p>: var haskell = document.getElementsByClassName("c-green")[1].lastElementChild;
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十舍我再来
// 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.querySelectorAll('.c-red.c-green >p');
// 选择<p>Haskell</p>: var haskell = document.getElementsByClassName("c-green")[1].lastElementChild;