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PHPz批改状态：合格
老师批语：
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Title</title><style>@import url('demo1.css');</style></head><body><h1 class="demo1">你好实际二</h1><div class="list"><div class="item">item1</div><div class="item">item2</div><div class="item">item3</div><div class="item">item4</div><div class="item">item5</div><div class="item">item6</div></div></body></html>
h1{color: red;font-size: 12px;}h1.demo1{font-size: 16px;color: green;}.item:nth-of-type(n+1){color: red;}.item:nth-of-type(n+2){color:green;}
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