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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x5.39.217.761 j/ I( R$ v7 W4 \1 r9 A2 d! S
总路程2x除以来回时间的和
- n0 P# l1 e# Y4 D2 F0 t12
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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