Turn on the first for one min and then turn it off. & X( c4 @! \5 w1 c0 K" O) r9 J6 {Turn on the 2nd for five min and then turn it off.- U+ L" w+ o: E
Turn on the 3rd and leave it on. " T4 i) ?: i( f9 m k6 }; }- p" JAnd then go upstairs right away.! e8 s Y6 `) u) |! j
& d; _' s9 m4 T' F) i M* ~7 lFind the answer by using your fingers and eyes % J D2 D7 [, B6 O# [! @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 : Q6 j) h9 @: C8 W$ i9 m% }
Turn on the first for one min and then turn it off. ( d& ?6 `! z tTurn on the 2nd for five min and then turn it off. . V! Q3 N& s7 {2 _2 mTurn on the 3rd and leave it on. , h: I7 w* G: f% f7 iAnd then go upstairs right away.! f5 j: P& B2 Q: z
. `$ w/ D0 F2 @' Q) X- z
Find the answer by using ...