修改基础知识中的一处错误
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@ -428,7 +428,7 @@
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"objs": [
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"K0226001B"
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],
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"content": "点$P(a,b)$关于直线$l$的对称点的坐标为$P'$\\blank{50}."
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"content": "点$P(a,b)$关于直线$l:y=x$的对称点的坐标为$P'$\\blank{50}."
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},
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"B00061": {
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"lesson": "K0226",
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