Turn on the first for one min and then turn it off. ' A2 _6 l& m* H1 I' HTurn on the 2nd for five min and then turn it off.0 K& [% H( C) G3 k: r) I' [
Turn on the 3rd and leave it on.1 z: c8 w2 l) R0 S! V: T
And then go upstairs right away. 6 f: D$ }$ z7 N7 i( D/ c7 G1 p7 }+ D; ~( r) i
Find the answer by using your fingers and eyes % `. b% l$ X" w* V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 - ]: |5 K/ i" N
Turn on the first for one min and then turn it off. 2 V1 Z* V9 B$ OTurn on the 2nd for five min and then turn it off.. F* `% O5 ]# k @+ S p9 |; M1 j
Turn on the 3rd and leave it on. / y7 j, i* `8 F: {- KAnd then go upstairs right away. 3 l% d. s2 X. @( z5 _6 d6 B* ]% O' e" d$ s# S
Find the answer by using ...