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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x5.39.217.778 y$ F* Y2 T  k; V  ?/ k, {' h: i) v/ k
总路程2x除以来回时间的和
5 W" r2 P8 N% G) s1 Itvb now,tvbnow,bttvb12
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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