easy, one minutes i solve the problem
! O1 y& r! I$ C5.39.217.77:8898divide into half, mean 6/ 6
4 @3 `7 C' B( H9 c7 l5 Y ntake the heavier 6 ping pong% l# ~! x% y) G* g
divide into 3/3, take the heavier 3
; d+ A7 K4 q7 D0 [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 08:11 PM
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