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让我看看
what???let me see~~
019: :019:
let me have the answer
单向路程x,来回时间分别为十分之x,十五分之x5.39.217.77% I6 X# J6 k5 D, f
总路程2x除以来回时间的和
% y) t, D- I/ |& Z$ S/ B  T- R12
thank you
see see
http://klyriz4u.blogspot.com/
12.5?
cccccc
12.5 ??
睇吓點做
thank you very much
thank you very much
thank you very much
thank you very much
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