Turn on the first for one min and then turn it off. - d- D# f# H) n' l5 E: YTurn on the 2nd for five min and then turn it off. 0 R3 \- ]# Y* z" J" PTurn on the 3rd and leave it on. 3 T8 J P3 |4 r9 q/ l+ |$ ^% VAnd then go upstairs right away. . A; b; ]3 U: @7 V 1 f2 J# X3 p" D4 c" H% [Find the answer by using your fingers and eyes* V, B' S& S' u/ q0 g
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 1 p7 Z( E! K6 Y2 C1 ?% CTurn on the first for one min and then turn it off.; ^; a# N! ^2 [ P7 q4 U' t" s' j- d5 C
Turn on the 2nd for five min and then turn it off.* ?0 L G9 Y: i, e& ^! ]# g1 c
Turn on the 3rd and leave it on. " ]4 w5 p' w1 ]4 W3 i3 r* I4 R* R8 l6 cAnd then go upstairs right away.; r# u5 s5 k0 T0 j; F; y
, d) e$ u) t6 m! ~8 E7 N S p8 bFind the answer by using ...