Turn on the first for one min and then turn it off.7 O* i/ ^( ^1 \% j
Turn on the 2nd for five min and then turn it off.( M+ o0 L# g2 e4 y
Turn on the 3rd and leave it on.( g& N9 Q$ b- I
And then go upstairs right away. J' j. ?6 U5 L1 G
7 C" O% [$ @, Y! i: _/ O/ ?; U, ~Find the answer by using your fingers and eyes0 n; d# a6 h, a& q
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 ; l. C0 J7 M6 ], b t
Turn on the first for one min and then turn it off. * [! S$ S' y, a( ^3 o0 iTurn on the 2nd for five min and then turn it off. 3 P- R$ _6 X: M Q/ oTurn on the 3rd and leave it on.. ]# S2 B+ u5 T& c2 X0 O
And then go upstairs right away.9 k9 Q3 t% w$ ?: w
+ ?% ^: D5 e/ s' R3 _2 WFind the answer by using ...