doctype
doctype html> html> head> meta charset="utf-8"> title>
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html5有哪些新特性?doctype作? 严格模式与混杂模式如何区分?
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doctype html> html>
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doctype html> html data-n-he
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doctype html> html> head>
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doctype html> html dir="ltr" lang="zh-cn">
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doctype
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doctype html> html> hea
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doctype html> html
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doctype html> html di
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doctype html> <html lang="en"> <head> <
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doctype
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doctype html
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doctype html>
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doctype
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doctype html> h
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doctype
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doctype
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doctypehtml> htmllang="zh-cn"> head> metacharset="utf-8"> title>
图片尺寸1240x533![doctype html> !--[if lt ie 7 ]> html](https://i.ecywang.com/upload/1/img0.baidu.com/it/u=3673875577,3912789316&fm=26&fmt=auto)
doctype html> !--[if lt ie 7 ]> html
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![doctype html> !--[if lt ie 7 ]> html](http://wx1.sinaimg.cn/large/a2817203gy1fo231rnaexj20zk0qotah.jpg)