Turn on the first for one min and then turn it off. . }' g: t: Y: Q7 e( BTurn on the 2nd for five min and then turn it off.2 G1 S7 s6 e5 u9 s$ D3 o
Turn on the 3rd and leave it on. ! B( g" y$ v) \, IAnd then go upstairs right away.8 }2 V4 D/ M' J, b! Q
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Find the answer by using your fingers and eyes8 t' Q7 E4 ^8 o/ u- u& c
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 & L; ]- z4 U4 b: b8 d! DTurn on the first for one min and then turn it off." O8 { A; S+ ?) u9 B/ G% W
Turn on the 2nd for five min and then turn it off.- K2 S8 d, @! e; M
Turn on the 3rd and leave it on.3 _4 }/ H0 l6 v8 I
And then go upstairs right away." S! M. V( N3 t8 v1 @+ d! C& L# j6 R
: h6 Z& b5 l, |+ ^
Find the answer by using ...