put 3 balls on each side, tvb now,tvbnow,bttvb2 `) s6 p6 {& t( L& c
if balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb! o1 r9 v. T5 d4 M- ~1 I# E t
if not balance, we can prove that the 6 balls outside the 天平 is normal.% G0 E+ _2 ^0 q8 ^! J
then use the proved-normal ball on one side and put the other ball on other side 公仔箱論壇7 [1 U, j9 z- T+ M' L' A7 j
to determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
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