Turn on the first for one min and then turn it off. : s# {; m. Y* Q- H& r& NTurn on the 2nd for five min and then turn it off. ) p: g* T6 e5 O9 H& RTurn on the 3rd and leave it on.9 A3 e2 i5 J. t' q! Y3 E
And then go upstairs right away. ' U) G+ I4 P) }7 o% E1 L' Y3 X3 b, Q4 e) n$ O! G9 o
Find the answer by using your fingers and eyes & N* o( P& _# {! z% F/ x* n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 ) k9 Q* `7 @2 w- c# lTurn on the first for one min and then turn it off. " k8 Z4 V8 F3 b5 |, GTurn on the 2nd for five min and then turn it off.: ^1 V# i# D! k, ~+ P3 }
Turn on the 3rd and leave it on. 7 y9 w: U# X4 @1 G& y2 OAnd then go upstairs right away. 0 L1 {. J2 S1 e- }0 k( R" P+ I$ i# N9 _
Find the answer by using ...