easy, one minutes i solve the problem5 r% c& [, w% J4 o3 f- b1 F( ^
divide into half, mean 6/ 6. Y& p0 O8 ~2 i. M7 v! l; }
take the heavier 6 ping pongtvb now,tvbnow,bttvb0 e! n* `; p z2 K7 G$ \3 k& x/ v+ a
divide into 3/3, take the heavier 36 J: {, X: G# G& r9 n( |
take the the other 3 that have the equal weight, switch each to measure, the most important things is labeling the ping pong so that we can recognize |
發表於 2009-2-8 04:58 PM
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