Turn on the first for one min and then turn it off. % W0 K1 d5 `. Q$ }* mTurn on the 2nd for five min and then turn it off. * m( f+ u) r2 N, L0 hTurn on the 3rd and leave it on.: ~: q& d' G9 m% R& q+ [0 I
And then go upstairs right away.' t5 Q6 w5 Y6 C0 J2 P
2 M0 w" @: g0 A9 T/ PFind the answer by using your fingers and eyes" u9 Y: \3 h( b/ p$ T, G& 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 / y# s% u5 F YTurn on the first for one min and then turn it off. # I+ _) j6 [- V$ @. pTurn on the 2nd for five min and then turn it off. . f; F5 F' i' QTurn on the 3rd and leave it on. L2 `7 Y. ]2 O; ^And then go upstairs right away. . h# [# x" C# h$ @! \( A! e$ L( P( V: O) {* J- p
Find the answer by using ...