Turn on the first for one min and then turn it off. $ u( q) m! R5 m0 ^2 n: l9 {) \Turn on the 2nd for five min and then turn it off.& t$ K3 y& Y, j4 _/ m3 Q( Q1 w j
Turn on the 3rd and leave it on. 4 Y* Z7 R8 I" M9 e7 g6 c; SAnd then go upstairs right away.2 H; V% i8 _4 Y) s1 @
! {4 y1 F- y2 S) N2 b- ?
Find the answer by using your fingers and eyes4 u1 q( J- b$ m3 F* j: u
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 : L6 g8 `7 u4 x: [
Turn on the first for one min and then turn it off. 4 Q2 M6 O9 T2 l7 kTurn on the 2nd for five min and then turn it off.5 j+ n5 L1 j' e( Y6 q0 R
Turn on the 3rd and leave it on.# }1 l5 F& n0 B/ U5 e s9 H
And then go upstairs right away. 6 m' W5 E5 Z2 C: T4 ^9 U" U" E 9 F8 w# R) _( { z2 ]7 r+ hFind the answer by using ...