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我没有火焰兢兢... :), 老油请进

tutu (lazy tutu)
第二次称时,5球中任取3个(假设是1,2,3号)放上天平一端,另一端放3个标准球, 如果不相等, 假设1,2,3这一端向下沉,说明该小球比其他重; 如果1,2,3这一端向上翘,说明该小球比其他轻.
(#48512@0)
2001-4-18 -04:00
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