Turn on the first for one min and then turn it off. ( {' @7 ^- j1 w" @Turn on the 2nd for five min and then turn it off.6 P+ H# }1 @& d! ~# H4 ]
Turn on the 3rd and leave it on.: ]1 h, a. C3 K9 p7 w1 Z
And then go upstairs right away.$ Z0 V9 s6 b5 a6 T
$ \+ E1 i! S: L; }, y* ?8 `9 uFind the answer by using your fingers and eyes ) [8 Y9 M) _6 t) z6 }$ R2 i+ `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 & @ T. o9 f0 c5 q
Turn on the first for one min and then turn it off.. P7 |, y! R7 X6 C i
Turn on the 2nd for five min and then turn it off. ; V, M1 e; c) f$ Z! n0 w% s8 t: ]Turn on the 3rd and leave it on.- d; U* C$ z, ?; k5 w
And then go upstairs right away. 4 v5 T. }; }/ h7 S- @: Q/ s & G5 N. x2 E! T; Z* p0 p: |3 dFind the answer by using ...