put 3 balls on each side, www2.tvboxnow.com0 O4 c& d% H/ Y
if balance, we can prove that all 6 balls on the 天平 is normal, ; V$ L# i; V, B: h; I1 D; j6 t
if not balance, we can prove that the 6 balls outside the 天平 is normal.
: R8 S) D3 b+ UTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。then use the proved-normal ball on one side and put the other ball on other side 2 ^9 F- J6 |' Q
to determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
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