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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 340 260" width="340" height="260"><title>事件之间的关系</title><defs><marker id="a" viewBox="0 0 10 10" refX="9" refY="5" markerWidth="7" markerHeight="7" orient="auto-start-reverse"><path d="M0 0L10 5L0 10Z" fill="#416687"/></marker></defs><rect width="100%" height="100%" fill="white"/><g font-family="Microsoft YaHei,Arial,sans-serif" fill="#263c52" stroke-linecap="round">
<circle cx="85" cy="110" r="65" fill="none" stroke="#416687" stroke-width="2"/>
<circle cx="255" cy="110" r="65" fill="none" stroke="#416687" stroke-width="2"/>
<text x="85" y="110" text-anchor="middle" dominant-baseline="central" font-size="19">事件 A</text>
<text x="255" y="110" text-anchor="middle" dominant-baseline="central" font-size="19">事件 B</text>
<text x="170" y="237" text-anchor="middle" dominant-baseline="central" font-size="19">(d) A ∩ B = ∅</text>
</g></svg>