Turn on the first for one min and then turn it off.. l+ J, s6 E7 W4 h9 D* _5 Q
Turn on the 2nd for five min and then turn it off.$ E) D5 ?- ^' X k
Turn on the 3rd and leave it on. ' Y9 I' d7 {7 h5 q$ q& j7 JAnd then go upstairs right away.( l5 n3 l; k7 `9 E( ^
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Find the answer by using your fingers and eyes 0 o7 k8 W0 [/ m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 5 Y$ _/ f! v$ b+ u7 Q( A6 v: D
Turn on the first for one min and then turn it off. ; `' Q) w% J) X- a/ aTurn on the 2nd for five min and then turn it off.% W/ C2 @. I' S( ?0 C& {
Turn on the 3rd and leave it on. * c* z# L" ], Q& `- L% @- r. UAnd then go upstairs right away.4 m7 g1 Z: \- E) ~
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Find the answer by using ...