可以使用单引号或双引号，只要左引号和右引号匹配，常用的还有其它引号的变化形式。

You can use single or double quotes as long as opening and closing tokens match, and there are other variations on quoting that are frequently useful.

youdao

注：在开始和结束的标签组成中缺少关键字符，比如：一个右尖括号、属性值不匹配或者双引号不完整。

Note: Start and end tags that are missing a critical character in their formation, such as a closing Angle bracket or a mismatched attribute value quotation mark are not complete.

youdao

注：在开始和结束的标签组成中缺少关键字符，比如：一个右尖括号、属性值不匹配或者双引号不完整。

Note: Start and end tags that are missing a critical character in their formation, such as a closing Angle bracket or a mismatched attribute value quotation mark are not complete.

youdao