Turn on the first for one min and then turn it off. / `2 {- D. Q, f% l: TTurn on the 2nd for five min and then turn it off./ ^* d8 O2 @& J' M: m, o9 }+ t
Turn on the 3rd and leave it on.2 J# A; `0 i9 I0 U; @- e9 U
And then go upstairs right away." m$ q4 U: M: ]3 |" s/ p
6 H! z6 g, U1 X5 k1 oFind the answer by using your fingers and eyes ' ?; B1 d( {9 D9 T2 [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 9 h# x9 w4 T$ _3 q+ Y9 p; r5 ?4 n
Turn on the first for one min and then turn it off. 9 j2 e% U, P J# Y$ J6 R/ I" uTurn on the 2nd for five min and then turn it off.9 w/ \, w5 _! ] C/ `
Turn on the 3rd and leave it on.6 u& i3 ]4 y; d: t' `" z) @* K0 p
And then go upstairs right away.; P8 P) {+ a0 a; K
2 v% ~& _2 ~8 e" H( e
Find the answer by using ...