put 3 balls on each side, 9 o( a; u5 a$ t
if balance, we can prove that all 6 balls on the 天平 is normal, www1.tvboxnow.com! t( w- r9 e7 G' _$ n
if not balance, we can prove that the 6 balls outside the 天平 is normal.
" r9 Q/ h+ @4 c1 P, v; g# g6 ZTVBNOW 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 + k. M1 R' V: D0 |) H t8 D1 C
to determine the abnormal is heavy and light |