Turn on the first for one min and then turn it off.$ v+ G3 t; U) r/ ~! h6 u7 f( j
Turn on the 2nd for five min and then turn it off. 6 i5 v3 a w( a" Z4 L7 e5 k1 QTurn on the 3rd and leave it on.; X/ N8 K/ [% W. ?0 ?3 v
And then go upstairs right away. : t0 s! W* a, R 7 r2 x% {! K9 d% R' ?; gFind the answer by using your fingers and eyes # B# E: w9 [) g6 u1 i' T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 : {: g; c1 i5 M# k: d* ^& oTurn on the first for one min and then turn it off.+ s( s' K& J" z' ]
Turn on the 2nd for five min and then turn it off. & m/ a" V5 d0 xTurn on the 3rd and leave it on. 1 @ D2 X h2 ?) u( Q$ a% a: e5 f! n. mAnd then go upstairs right away.) c5 y2 q* Q& A; f" }$ Y! Z
/ e. R+ B) ^5 N5 z# M9 }$ F
Find the answer by using ...