Turn on the first for one min and then turn it off.6 g6 O6 b% Q3 s" o( S
Turn on the 2nd for five min and then turn it off. - B. m/ N3 W, @2 v7 tTurn on the 3rd and leave it on. A' c$ y; y2 z4 d
And then go upstairs right away. # I8 k) C& O: n' u) t9 r& Y 6 y- Z# ~7 \$ Q# v3 r. ^Find the answer by using your fingers and eyes . S( A3 }$ \. G" l8 s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 $ {. z; I/ Y' f ~+ ~
Turn on the first for one min and then turn it off.2 ^0 E2 {8 U h; Q1 u
Turn on the 2nd for five min and then turn it off. / M! A; y$ B( l6 \2 V0 QTurn on the 3rd and leave it on.: P7 }( q7 l& v7 W9 I Y
And then go upstairs right away. ; v: \# V7 B/ f; [ & B1 B7 X1 a0 ^8 S0 m; q3 ^Find the answer by using ...