Turn on the first for one min and then turn it off. - n2 F. i, z6 v; q: eTurn on the 2nd for five min and then turn it off. 2 w9 B3 G! m; x9 sTurn on the 3rd and leave it on.! ] _# r- w! `. }
And then go upstairs right away.( s5 Z4 ^! _! W- x: @, `
; r: B1 n5 c3 t0 [1 ~2 |3 c: nFind the answer by using your fingers and eyes " n1 \* v" m1 s+ J" U a# o' v9 }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 j+ E& m9 c v, C5 K2 v
Turn on the first for one min and then turn it off. ! t3 s d$ y) ^4 I* j) FTurn on the 2nd for five min and then turn it off. ! f; H; |- o& T0 YTurn on the 3rd and leave it on. 5 X# b. V+ n* r: b$ `" N* p! lAnd then go upstairs right away. ) z7 h4 q. Z4 X8 N" | 5 N& v0 M2 h- J' f$ ~Find the answer by using ...