30 lines
2.5 KiB
XML
30 lines
2.5 KiB
XML
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<title id="title">格点中的正方形及其外接正方形</title>
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<desc id="desc">根据教材扫描图人工重绘的矢量教学示意图。文字与线条可无损缩放。</desc>
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