Turn on the first for one min and then turn it off. " z$ }2 l; C: P$ pTurn on the 2nd for five min and then turn it off. ; b! |9 s5 _5 i- J) s7 T2 zTurn on the 3rd and leave it on. $ t4 a) S# R8 q& K" @3 C3 R IAnd then go upstairs right away.0 K8 c5 f/ f/ R; ?
, B3 Q, x) Q7 eFind the answer by using your fingers and eyes ) K5 h3 b+ N" v1 Q5 N' `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 # m# r; P6 } aTurn on the first for one min and then turn it off.) s" n2 _: X# H; n, H
Turn on the 2nd for five min and then turn it off., E; M4 Y& t& s6 m) _
Turn on the 3rd and leave it on. 5 X( O8 R9 U4 Y8 n+ `0 }And then go upstairs right away. 6 W1 p4 }/ S; ? " v$ i- q0 J! O" e2 WFind the answer by using ...