Turn on the first for one min and then turn it off. " A) k2 f2 P' @6 UTurn on the 2nd for five min and then turn it off.% t& p* z4 T2 h" u6 u3 n6 F
Turn on the 3rd and leave it on.3 S" H2 m0 n/ I% c3 n6 ?
And then go upstairs right away.: i' R" N. _5 F6 M& ]# P- N9 r% O
+ N" ?+ x$ G: ^& T& G( gFind the answer by using your fingers and eyes/ i T8 ~7 G6 O8 v( W8 |+ a
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 1 k, e& m4 i. D; k N" C( p$ `
Turn on the first for one min and then turn it off. : C2 W9 N4 t9 _) B, ^2 o3 U7 sTurn on the 2nd for five min and then turn it off.. T- c+ J3 u R$ K6 z7 P
Turn on the 3rd and leave it on.9 J: C$ R* \) ?: @2 K0 A4 o. d
And then go upstairs right away.( K6 k& @, }* x8 ~9 J
- p: w! G( y9 _9 e# d( y: kFind the answer by using ...