Turn on the first for one min and then turn it off. G! I- T; C; A6 y
Turn on the 2nd for five min and then turn it off.( G3 p/ w3 p" a6 V- W
Turn on the 3rd and leave it on.) z0 [; Q* }, q$ G# M- Q5 o
And then go upstairs right away." e) L% D: Q" D
6 t$ w# `' }$ G5 l2 i& b& F, M
Find the answer by using your fingers and eyes; S% H/ o/ {1 H8 Q. n! o
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 " i5 v; S2 K4 i) G/ _Turn on the first for one min and then turn it off.' Z: s0 g+ L' l
Turn on the 2nd for five min and then turn it off. ; d8 M' f" Z% d/ A( c/ K6 K* {Turn on the 3rd and leave it on.7 Z+ P7 D+ n9 `$ K
And then go upstairs right away. 7 g! |) R% @6 \. X0 |/ Q8 x- R8 Y; X+ f" W( f
Find the answer by using ...