put 3 balls on each side, 0 P- C R9 _, o& i; N! o
if balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb9 Z/ a- K) a: d! {" x4 F- M& V
if not balance, we can prove that the 6 balls outside the 天平 is normal.www2.tvboxnow.com. ~. f! n% Z, Q; X( t8 Z
then use the proved-normal ball on one side and put the other ball on other 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。4 {5 f6 o3 n/ ]3 ?2 l* l
to determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
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