Turn on the first for one min and then turn it off.) }; {5 {% o! C$ Y/ }
Turn on the 2nd for five min and then turn it off.) A+ c& z5 n0 `, E
Turn on the 3rd and leave it on. 8 v, x* p; X) X! x: |( h4 EAnd then go upstairs right away., x; j: g: V0 r* Q
y8 F) \5 n b
Find the answer by using your fingers and eyes. L) @$ Y# ?1 t7 g6 |, n9 E
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! O8 Y& e& b8 D; Y! B% G
Turn on the first for one min and then turn it off.; |4 C0 ^; Z2 r
Turn on the 2nd for five min and then turn it off.5 \& i/ S& ]6 q6 ~3 @
Turn on the 3rd and leave it on. q3 r, g* H, W( j; A, {3 |( x, qAnd then go upstairs right away. 7 d0 V/ f4 p5 t1 U) w# e- p" i C! | g& f! o- `: _
Find the answer by using ...