easy, one minutes i solve the problemTVBNOW 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。: V" N2 |" E- @0 m5 f6 U0 c; t3 X# i
divide into half, mean 6/ 6
4 L5 p7 \2 }/ h; _; |4 p& Ctake the heavier 6 ping pong+ }! \0 v% h( l- R
divide into 3/3, take the heavier 3
) @( o" ?9 Y& N6 \) `, }8 ttake 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 08:11 PM
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