Turn on the first for one min and then turn it off. 0 t2 F) G1 ?& |" i1 J* T- \- P5 `Turn on the 2nd for five min and then turn it off.. R, l6 z" B2 h& D4 }+ m$ [
Turn on the 3rd and leave it on. ) U! U, C# ~+ A) ~5 r4 q' lAnd then go upstairs right away. " @* l* v" [3 s: M( w: ]$ H! B4 r! M3 w. n1 s v- s
Find the answer by using your fingers and eyes3 S) i- h; D6 f& \2 `
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 8 E6 z ?3 q9 ]Turn on the first for one min and then turn it off.* c0 N+ w3 Y. t' }# [- n$ L
Turn on the 2nd for five min and then turn it off. 1 x2 @8 B7 E' x9 r! D) _Turn on the 3rd and leave it on./ K1 [9 h* _5 C( \- R# R
And then go upstairs right away. % U }: m1 ^& j! B0 {( t6 V7 x4 V8 C( l [6 k
Find the answer by using ...