Turn on the first for one min and then turn it off. ' B7 ?0 v! |3 m7 k9 w! C" RTurn on the 2nd for five min and then turn it off.' I8 x' T0 j/ b. w% h- s
Turn on the 3rd and leave it on.: h: m0 O% r C- \' u
And then go upstairs right away. * l2 ]8 K6 h3 n$ x& x" l ( v) \1 D- o2 y" K) K9 @0 LFind the answer by using your fingers and eyes4 c+ {- R" b# f' {
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 . V3 `, d: h a0 B4 ~Turn on the first for one min and then turn it off.! K8 @* \# E' e
Turn on the 2nd for five min and then turn it off. 2 } {. n$ h1 }' TTurn on the 3rd and leave it on./ n5 X. N& v3 D- q
And then go upstairs right away.1 h3 r/ I+ H; F! ~0 s9 U
/ ^4 u: c8 L; d. z
Find the answer by using ...