Turn on the first for one min and then turn it off. ( [* v9 O( E6 v+ E$ |) E. m3 r4 @Turn on the 2nd for five min and then turn it off./ w8 Y8 ?* R; H) J
Turn on the 3rd and leave it on.0 Y- ]; [" b [, I4 n ~
And then go upstairs right away.: Q) D% ]8 O. |. }: O9 ]4 l; x& t
* H# C% Z8 \6 q3 `. zFind the answer by using your fingers and eyes ( ?( P* {0 `- p' k& H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 - d% y5 h) c% c# |8 i D9 p1 {3 X
Turn on the first for one min and then turn it off.' O7 I0 P0 @ Y/ w
Turn on the 2nd for five min and then turn it off., [: m$ C$ `& A
Turn on the 3rd and leave it on. 6 D! ^6 I7 I$ c3 `* uAnd then go upstairs right away.5 i$ n8 w% e4 R
8 n" }0 L& L2 ], ] K$ ?8 t
Find the answer by using ...