Sorry，长13距离X轴6.6（以line20的一端为圆点画圆与y=6.6相交），然后量另一条线的长度，取整

来源: bangbang9814 于 2012-12-07 06:34:15 [旧帖] [给我悄悄话] 本文已被阅读：次

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