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有人说8个直角，有人说12个直角，错！正确的是这个！
数直角的数目，很多同学都错了，正确的应该是多少呢？
二年级上册难题易错题10/16
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App02:43数直角的数目，很多同学都错了，正确的应该是多少呢？
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