Turn on the first for one min and then turn it off.- c6 W2 o- {7 C; d
Turn on the 2nd for five min and then turn it off. a" A9 `; o; }9 A9 {
Turn on the 3rd and leave it on.) e0 |4 j! B3 e
And then go upstairs right away.' z4 G- j) o7 N9 P1 a9 _* \
" |$ T, Z ~( o% g
Find the answer by using your fingers and eyes 4 I' G) \; @# `" l. T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 + _( R+ W3 o6 G/ I: c0 _! \
Turn on the first for one min and then turn it off.; P9 g+ ?- q1 i$ N
Turn on the 2nd for five min and then turn it off. 3 ?' A6 b% c# u2 Z7 oTurn on the 3rd and leave it on. 1 E+ }& ?) y/ E7 @ n/ @* |And then go upstairs right away. % j, b3 d; y# t* t) u& |7 C' C4 V7 G
Find the answer by using ...