×

×

<!DOCTYPE html>
<html>
<head>
<style>
.intro {background:pink;}
.special {color:red;}
</style>
</head>
<body>

<h1 @(21)>My Home Page</h1>

</body>
</html>

<!DOCTYPE html>
<html>
<head>
<style>
.intro {background:pink;}
.special {color:red;}
</style>
</head>
<body>

<h1 class="intro special">My Home Page</h1>

</body>
</html>

<!DOCTYPE html>
<html>
<head>
<style>
.intro {background:pink;}
.special {color:red;}
</style>
</head>
<body>

<h1 class='intro special'>My Home Page</h1>

</body>
</html>

<!DOCTYPE html>
<html>
<head>
<style>
.intro {background:pink;}
.special {color:red;}
</style>
</head>
<body>

<h1 class="special intro">My Home Page</h1>

</body>
</html>

<!DOCTYPE html> <html> <head> <style> .intro {background:pink;} .special {color:red;} </style> </head> <body> <h1 class='special intro'>My Home Page</h1> </body> </html>

不正确

点击 这里 再试一次。

正确！

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