put 3 balls on each side, 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。" y, f7 o, K7 Q3 }' `/ _$ S
if balance, we can prove that all 6 balls on the 天平 is normal,
1 k3 s6 ^% }4 O1 S; p. L6 p! {if not balance, we can prove that the 6 balls outside the 天平 is normal.
! C4 a+ U: |, f& z+ ~www1.tvboxnow.comthen use the proved-normal ball on one side and put the other ball on other side
1 L: P: Y+ `0 q1 s6 i. e' X公仔箱論壇to determine the abnormal is heavy and light |