Turn on the first for one min and then turn it off.% f& c8 \* q7 |7 ~7 \( [
Turn on the 2nd for five min and then turn it off., F [& e7 z9 h) W8 H4 P& X# ~
Turn on the 3rd and leave it on.* v, c; Z$ D. H1 t! J' W2 v6 K
And then go upstairs right away.7 y0 K- r2 t& y3 g Q
( P S" k# E5 x6 `* tFind the answer by using your fingers and eyes! i) X+ f7 U R+ P
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 $ y {. q+ ?9 |: A' N
Turn on the first for one min and then turn it off. / a: D4 s& ^; E. r4 zTurn on the 2nd for five min and then turn it off. ' [; `5 Z: X8 L3 fTurn on the 3rd and leave it on. " O4 r7 l6 a8 O6 J& s4 o' k5 {And then go upstairs right away. ' s8 w1 W; i1 O( i9 } 8 _; j$ a2 Z6 D7 T! i6 iFind the answer by using ...