昨天在看代码时，看到了下面这段代码
body:last-child {
font: 64%/133.5% "ＭＳ Ｐゴシック"， sans-serif;
}
这里的last-child是css中伪类
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下面举一段代码作为例子
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "/TR/html4/loose.dtd"> <html><head><style type="text/css">p:first-child {font-weight: bold;}li:first-child {text-transform:uppercase;color:red}</style></head><body><div><p>These are the necessary steps:</p><ul><li>Intert Key</li><li>Turn key <strong>clockwise</strong></li><li>Push accelerator</li></ul><p>Do <em>not</em> push the brake at the same time as the accelerator.</p></div><p><b>注释：</b>必须声明 DOCTYPE，这样 :first-child 才能在 IE 中生效。</p></body></html>
效果
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These are the necessary steps:
•INTERT KEY
•Turn key clockwise
•Push accelerator
Do not push the brake at the same time as the accelerator.
注释：必须声明 DOCTYPE，这样 :first-child 才能在 IE 中生效。
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