Turn on the first for one min and then turn it off. : m$ p9 c- W" r1 @; n) }Turn on the 2nd for five min and then turn it off. 0 N/ t3 g8 c" n% [2 }1 |# rTurn on the 3rd and leave it on.1 d1 l4 X1 H* X V2 ^
And then go upstairs right away. 2 u; l9 ^5 u0 X* B/ Z 6 b, I4 g. v8 T# kFind the answer by using your fingers and eyes 8 n9 f+ i: g: k/ Y9 b1 d* y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 $ N$ Z2 l- x* \$ b, j& A/ g5 I
Turn on the first for one min and then turn it off. ' J$ {1 O" g6 `/ w! mTurn on the 2nd for five min and then turn it off. 7 N @7 O2 v& ^. I) i% uTurn on the 3rd and leave it on. ( |- y% I5 A1 G* rAnd then go upstairs right away. 7 Y4 V1 g+ s% d# ^! O% Z& z1 U& @1 i' H& g, j2 W& T
Find the answer by using ...