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354#
發表於 2008-11-23 12:23 AM
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64seconds
' j8 _+ U9 ]) ]公仔箱論壇
& [: q; W1 M J7 x: \1 to 4 have 3floors = 48 sec
8 ?# ^0 S0 X- Xavg. 48/3 = 16sec
5 T: \' P1 \2 P/ j2 n公仔箱論壇
; F9 g! g( g6 I& S6 Q公仔箱論壇4 to 8 have 4floors = 16x4公仔箱論壇7 ] B2 U. n4 J) I: N m, y/ ]
= 64secs |
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