Turn on the first for one min and then turn it off. 3 m# v" e6 x$ d! D3 ATurn on the 2nd for five min and then turn it off. " Y' }3 r' T; e( _1 ]7 STurn on the 3rd and leave it on.' y( v; ~9 l, c1 b
And then go upstairs right away.; B* _" E0 V x- i4 X
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Find the answer by using your fingers and eyes 3 a9 U3 c8 q9 L0 y# c) W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 6 ~0 m+ r _, F0 A6 YTurn on the first for one min and then turn it off.) D" f( ~4 @' Z% \ ]
Turn on the 2nd for five min and then turn it off.% c, \" i" e4 ]2 v$ b' P
Turn on the 3rd and leave it on.' j% M5 g- ]9 U6 f# \- y1 { A
And then go upstairs right away. $ M" V/ T, d" p " y/ i, s; {6 lFind the answer by using ...