Turn on the first for one min and then turn it off. - \' E- B/ B& n* h$ STurn on the 2nd for five min and then turn it off. * q, | L B& z, e/ _" v4 }$ Y1 h" sTurn on the 3rd and leave it on. V9 f# U5 L4 l( H+ M kAnd then go upstairs right away.: }$ Q8 {7 P7 j
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Find the answer by using your fingers and eyes4 R( ` m0 y7 w+ x
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 X' [0 J; Y K) b$ S2 D
Turn on the first for one min and then turn it off.) b4 l) o3 v2 ^' v) u& z P
Turn on the 2nd for five min and then turn it off.: V8 Y- z5 Z; t
Turn on the 3rd and leave it on. # s4 h+ e0 U. B" @& t q" sAnd then go upstairs right away.$ i. H( d# S- d- D3 v8 }; o$ @
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Find the answer by using ...