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$("div").eq(0).html("<img src='https://i.loli.net/2020/04/09/ivlVIwJLjX7F43z.jpg'/>这里长出了一片草莓");
$("div").get(1).innerHTML = "<img src='https://i.loli.net/2020/04/09/GqDgubLckQ8WjBF.jpg'/>这里的鱼没有了";
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<div><img src="https://i.loli.net/2020/04/09/ivlVIwJLjX7F43z.jpg">这里种了一颗草莓</div>
<div><img src="https://i.loli.net/2020/04/09/IEa3BwDN1Lc8mY2.jpg">这里养了一条鱼</div>
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