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正确
<style>
h1 {
@(8): @(5);
@(3): 50px;
@(5): 10px;
}
</style>
<body>
<h1>This is a heading</h1>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
</body>
<style>
h1 {
position: fixed;
top: 50px;
right: 10px;
}
</style>
<body>
<h1>This is a heading</h1>
<p>This is a paragraph</p>
<p>This is a paragraph</p>
</body>
不正确
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<style>
h1 {
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