Turn on the first for one min and then turn it off. . q5 a- \% ~1 ~: s! _/ o+ T5 dTurn on the 2nd for five min and then turn it off.# |" s5 j# ?; M% E
Turn on the 3rd and leave it on. 0 Y* l- C$ S" a {And then go upstairs right away. & z7 a8 A p: z9 t1 J9 H$ O4 f2 l/ D
Find the answer by using your fingers and eyes, \$ w9 M& x9 T$ R4 u3 `
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 3 w- O X) `- @( g
Turn on the first for one min and then turn it off.4 {2 l& l* J, f6 {
Turn on the 2nd for five min and then turn it off.; P$ @9 V" n4 w/ g0 {
Turn on the 3rd and leave it on. C+ k7 l7 `- t( Q/ M, Z
And then go upstairs right away.2 _+ M9 O5 u' ^- @+ R2 ~