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<title>HTML5 SVG记忆小游戏</title>
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<main class="game">
<section class="game__cards js-cards">
<div class="game__card js-card" data-animal="dog">
<div class="game__back-card">
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<div class="game__card js-card" data-animal="rabbit">
<div class="game__back-card">
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