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<html>
<head>
<meta charset="UTF-8">
<title>打砖块小游戏</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
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<body>
<div class="content">
<canvas id="canvas">
不支持画板对象
</canvas>
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