Turn on the first for one min and then turn it off.# G4 e( z) d) [6 T
Turn on the 2nd for five min and then turn it off.# e3 V; v2 p1 H) X5 L0 d
Turn on the 3rd and leave it on.* k6 c- L `, J5 y2 F
And then go upstairs right away." p5 l0 V) x! a% z6 d8 L
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Find the answer by using your fingers and eyes ' s( ]3 D+ g `+ b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 9 W, s( c% l0 {% ]: R0 YTurn on the first for one min and then turn it off. , c' y G- r* ~. |) ^* \Turn on the 2nd for five min and then turn it off. " H; Y: a8 b QTurn on the 3rd and leave it on.+ C! K9 i3 K1 F& W; E0 q
And then go upstairs right away. 5 u" U* u/ {; X" d* g ]) _' ^$ s* b# a# ]7 zFind the answer by using ...