你自己或你家小孩试试这个， answer each question with 5 seconds and post your answers:
Assume a=1, b=2, and so on,
Q1 what is c?
Q2 what is x?
Q3 what is a+b ?
Q4 what is b+y ?
Q5 what is x+x ?
趁热打铁，
392 (2012-12-31 00:02:30) 评论 (0)你自己或你家小孩试试这个， answer each question with 5 seconds and post your answers:
Assume a=1, b=2, and so on,
Q1 what is c?
Q2 what is x?
Q3 what is a+b ?
Q4 what is b+y ?
Q5 what is x+x ?