Turn on the first for one min and then turn it off. / A. l( n& o3 d* c) xTurn on the 2nd for five min and then turn it off. ; r; p/ e! p% ?: B! Y% TTurn on the 3rd and leave it on. 7 A3 W! k# O* n2 wAnd then go upstairs right away., X: [/ `& U k6 v2 g
( `+ \5 ?9 K( V1 y* o2 RFind the answer by using your fingers and eyes/ u3 ~* }: a; v3 n) B
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 % ~$ K: b* _9 p4 dTurn on the first for one min and then turn it off.; P& A+ q# [1 i4 [& M: i3 B
Turn on the 2nd for five min and then turn it off.0 ^$ C: I8 Z5 \: F
Turn on the 3rd and leave it on., \' G8 i; i9 G4 e9 v' H6 j
And then go upstairs right away. 2 s4 H" @% q7 x1 C6 b) ~. m7 q2 \) d! i: d1 e
Find the answer by using ...