Turn on the first for one min and then turn it off.2 U/ J9 X$ {1 b3 t* b# N: C7 X3 u
Turn on the 2nd for five min and then turn it off.+ S& |; a. t# H" _5 e' W
Turn on the 3rd and leave it on. 7 ]8 y: `! _8 GAnd then go upstairs right away.6 J/ i3 p% J k) M4 v
1 V3 l' `8 w4 r4 a8 m( h+ aFind the answer by using your fingers and eyes ! P. f; }4 Q: d& y9 O; v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 ) X3 J ?+ C: X+ f/ F# M. b; T
Turn on the first for one min and then turn it off. 2 C" _" [: s1 h- J; `: L5 XTurn on the 2nd for five min and then turn it off.; T. L' z- i; q. l6 ?/ f& T3 r8 n
Turn on the 3rd and leave it on.6 f1 R; G8 O, q1 `% Z$ e, N0 o
And then go upstairs right away. % ?. E6 h3 P; Q, Z0 G- v 9 r. @; h6 ]" d) T: v' Q" h- ~3 JFind the answer by using ...