put 3 balls on each side, 9 O6 g% ]/ w3 H, {, y3 K
if balance, we can prove that all 6 balls on the 天平 is normal, TVBNOW 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。5 j2 d' n2 g! f- r5 i1 K9 K9 X
if not balance, we can prove that the 6 balls outside the 天平 is normal.TVBNOW 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。6 _: @2 c/ u9 K7 q7 l
then use the proved-normal ball on one side and put the other ball on other side + X0 r8 t$ K! g
to determine the abnormal is heavy and light |