Turn on the first for one min and then turn it off.$ s% @1 G& I* F3 y: y j
Turn on the 2nd for five min and then turn it off. ; U/ V" \3 l) l8 U0 |3 u) `Turn on the 3rd and leave it on.6 X% S3 A; L$ c$ B* D1 H* N
And then go upstairs right away. : c$ }+ i& S5 ~. F 3 ]% D$ T& a* GFind the answer by using your fingers and eyes ' j0 x3 M% g, w. r V5 L, a! R2 F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 7 {' a j, C% I/ @) M$ ] ^2 KTurn on the first for one min and then turn it off.5 Q3 [. e, _) N! f7 h3 M# k2 v6 N" v
Turn on the 2nd for five min and then turn it off. ( c6 f8 k' Q3 o' N M! C+ j: ^; \6 TTurn on the 3rd and leave it on.2 m0 E* S: C8 ?5 {
And then go upstairs right away. # }4 J# j4 w8 E/ t0 X7 T0 W6 b B1 ? s8 N
Find the answer by using ...