Turn on the first for one min and then turn it off. 9 ^6 `. d/ g% ~/ N6 A. p( yTurn on the 2nd for five min and then turn it off. - d7 e+ p$ G. @0 z% r+ S z( PTurn on the 3rd and leave it on.$ F$ s- d# d/ s% o
And then go upstairs right away. / M7 r$ W- Z, {* Q) F* S$ W $ M6 U% B4 G# J4 r! CFind the answer by using your fingers and eyes) w7 T: P' O& m X3 w8 D9 `! I! p! 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 , l8 x0 P, e6 n. s3 F0 [/ ]
Turn on the first for one min and then turn it off.7 V9 [3 f% q+ k' U
Turn on the 2nd for five min and then turn it off.* A3 P: y* V* _' u+ E m
Turn on the 3rd and leave it on./ C# q0 Z& f$ Q. H. w
And then go upstairs right away. ; t3 b6 C; E" c, Q }$ g7 D2 @) y* d) b8 a& W( l3 L7 |* W
Find the answer by using ...