/kaoyan/%E6%95%B0%E5%AD%A6/%E9%AB%98%E7%AD%89%E6%95%B0%E5%AD%A6/%E7%AC%AC2%E7%AB%A0%20%E5%AF%BC%E6%95%B0/%E7%9F%A5%E8%AF%86%E7%82%B9/2.12%20%E5%AF%BC%E6%95%B0%E7%9A%84%E7%89%A9%E7%90%86%E5%BA%94%E7%94%A8%EF%BC%88%E6%95%B0%E4%B8%89%E4%B8%8D%E8%A6%81%E6%B1%82%EF%BC%89/ to /kaoyan/math/advanced-math/ch02-dao-shu/knowledge/2.12-dao-shu-de-wu-li-ying-yong-shu-san-bu-yao-qiu