Turn on the first for one min and then turn it off. ( {. }, g& q: M5 I, g2 O) ]2 lTurn on the 2nd for five min and then turn it off. 7 ^$ Q3 }1 r( L- `, f fTurn on the 3rd and leave it on.7 X5 d# {: d9 m4 _
And then go upstairs right away.' B2 O. l& J5 k# ^
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Find the answer by using your fingers and eyes * h- ~$ L- ?9 ^% }# n3 F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 I4 ^4 R" Z5 m4 }7 |Turn on the first for one min and then turn it off.4 U: e+ N" a. k& S4 F, u
Turn on the 2nd for five min and then turn it off.; [9 l+ V$ h/ X2 N! w' Y
Turn on the 3rd and leave it on.8 i* s* ?" Z& Z
And then go upstairs right away.7 s7 C) `% r5 v3 M. a6 ~
; h+ Q5 D6 l$ B! H e M% D7 P
Find the answer by using ...