Turn on the first for one min and then turn it off. 7 g, ?) y4 U4 `5 _Turn on the 2nd for five min and then turn it off. 9 }/ Z0 Q' I" e7 P1 NTurn on the 3rd and leave it on. 8 J. k9 m+ `" d5 UAnd then go upstairs right away.6 T" o8 E) L' i0 p1 y+ ^% J- \4 t$ |
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Find the answer by using your fingers and eyes / A& h* n' @) K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 ! T1 ] ]; I9 s) b
Turn on the first for one min and then turn it off., i; c3 I6 {3 g- K
Turn on the 2nd for five min and then turn it off.: c' k( c0 S6 d* v! i+ y9 g- w% z) B
Turn on the 3rd and leave it on. H6 r5 Q9 O: |+ F" ^) @* y/ nAnd then go upstairs right away.& |+ D3 O/ ]' [9 r- I. M R