×

×

<!DOCTYPE html>
<html>
<head>
<style>
@(1) {@(6): @(3) solid @(6);}
</style>
</head>
<body>

<p>This is a paragraph.</p>
<p>This is a paragraph.</p>
<p>This is a paragraph.</p>

</body>
</html>

<!DOCTYPE html>
<html>
<head>
<style>
p {border: 1px solid yellow;}
</style>
</head>
<body>

<p>This is a paragraph.</p>
<p>This is a paragraph.</p>
<p>This is a paragraph.</p>

</body>
</html>

不正确

点击 这里 再试一次。

正确！

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