Turn on the first for one min and then turn it off. 2 ^6 i$ U. G! @8 M }$ W% dTurn on the 2nd for five min and then turn it off. + a3 x' u( ]& C R; x! y! oTurn on the 3rd and leave it on. . ?4 T x8 Y aAnd then go upstairs right away.5 T% ^1 H! I) _ C" l# u6 g
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Find the answer by using your fingers and eyes7 Q# P, ~1 ?$ M! u' z! _: O; 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 # c! J6 e% m" G5 HTurn on the first for one min and then turn it off.1 w [4 @/ l: W! s/ N9 [
Turn on the 2nd for five min and then turn it off.$ i) U1 U) c( Q) S( O
Turn on the 3rd and leave it on. / {- J) [, W+ E& `- b$ j6 nAnd then go upstairs right away. W7 L# G* u" I+ y0 ?$ Q: z
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Find the answer by using ...