Turn on the first for one min and then turn it off.- C5 z4 Y+ p6 \4 {7 ^- I7 v5 r0 a
Turn on the 2nd for five min and then turn it off.( C9 g! V5 h+ F k( ]% O
Turn on the 3rd and leave it on. " Y8 q% o( u1 |$ W" Y6 K5 _! ZAnd then go upstairs right away.2 m& s U9 ]6 B9 b
0 x9 M( h( K" ?% d- A( n' qFind the answer by using your fingers and eyes , f! g, j; ^3 ]: F0 I4 }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 ' b9 d* h2 s6 E" t+ ~, N: XTurn on the first for one min and then turn it off. + h: ^' X# A* |Turn on the 2nd for five min and then turn it off.$ v. f5 g$ {/ v" O1 C" {$ ]0 X* N: ~
Turn on the 3rd and leave it on. ' K. n3 S5 V7 h" L; ZAnd then go upstairs right away.5 ?3 a, D2 V; ?* T2 A0 Z
) b8 A$ [) ~2 K
Find the answer by using ...