Turn on the first for one min and then turn it off.; k3 g3 g; b; n7 M# c# M* b; V
Turn on the 2nd for five min and then turn it off.7 b" K6 m9 z1 j' Z6 q
Turn on the 3rd and leave it on. . a4 g* y7 \* p: ]( EAnd then go upstairs right away.# f) W+ J& p+ H8 L; |! ?" k. Y
# G0 c5 s- m1 W* a: S' MFind the answer by using your fingers and eyes 3 y3 B K( H7 g. U这只是一个智力问题,不象是电工问题。
原帖由 老警察 于 2009-1-16 07:12 发表 0 U: j3 b. @: ^5 J* q9 u0 eTurn on the first for one min and then turn it off.( U7 I& l$ k4 Z) ~
Turn on the 2nd for five min and then turn it off. F4 a# f9 N5 X3 H- q, k
Turn on the 3rd and leave it on.* w! d. w' ~9 F L* I& U0 w# `
And then go upstairs right away., O7 J: C# k9 W5 l: \' T' T" V# o
, A/ I" T3 D6 t3 O+ R$ X
Find the answer by using ...