Turn on the first for one min and then turn it off. 3 D; l8 [/ _2 { @: u9 XTurn on the 2nd for five min and then turn it off./ U6 Z* x& f9 H
Turn on the 3rd and leave it on.! e' j6 h2 A! |0 G( P
And then go upstairs right away.% W3 w+ Q6 I1 ^4 O/ {, b0 ]( X
' _+ A/ [% W+ f- `* E4 y" jFind the answer by using your fingers and eyes% I. M$ f0 Q; e% X# {3 \3 w+ i
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 # l$ j" b% ~+ [/ H0 M4 b$ LTurn on the first for one min and then turn it off.9 A0 G L" |, H7 D
Turn on the 2nd for five min and then turn it off. , o( k& c( C8 ~- |* P' g! MTurn on the 3rd and leave it on.8 t9 W9 X# T j# @
And then go upstairs right away." c2 {6 w& F8 K" {9 z
2 c6 a' h1 y k5 c+ ]
Find the answer by using ...