Turn on the first for one min and then turn it off. 1 P+ a9 Y& o7 lTurn on the 2nd for five min and then turn it off.6 w4 b1 F' R. F5 [( V
Turn on the 3rd and leave it on.) |7 a! h1 `. u5 u1 s) C$ y
And then go upstairs right away. 8 i; q7 ~& a0 B2 O$ m, k$ j3 B4 t: O; o7 I% l9 @
Find the answer by using your fingers and eyes* k' F0 {4 j* v% c: Q$ w9 P7 B: H
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' _" Z9 q7 N( ^+ C d
Turn on the first for one min and then turn it off. ! j/ n! q. x' z$ L* c# QTurn on the 2nd for five min and then turn it off.8 M( {+ I! `4 J$ i- F; i7 S- m/ u
Turn on the 3rd and leave it on.6 ^1 k. a W) e/ \+ r6 p
And then go upstairs right away. 2 U" a) v8 j6 B: m) X. I$ _ + U- |, G3 `' a* Q: j0 yFind the answer by using ...