Turn on the first for one min and then turn it off. % O' L5 T0 _5 E1 O. B1 v7 CTurn on the 2nd for five min and then turn it off. ; J* M# Q4 m3 {# Y! [* _+ } }3 yTurn on the 3rd and leave it on. 6 D8 f+ w0 I8 O* q, [And then go upstairs right away., M. N v/ J6 g5 e7 {8 U% n
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Find the answer by using your fingers and eyes# ?8 v: \! t* i% D( ?, 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 ! K, t$ ?/ t( \" gTurn on the first for one min and then turn it off. " F) |& Q0 s( ]Turn on the 2nd for five min and then turn it off.( I) l$ u" r+ m" D# x9 C: s
Turn on the 3rd and leave it on.* C1 ^* ]! e$ m
And then go upstairs right away.! P, N: o$ U( W& U7 N4 h
8 w+ E- j& D9 u' _, x; p8 rFind the answer by using ...