Turn on the first for one min and then turn it off. 0 p3 [( l5 n! Z. R3 g( \2 O7 fTurn on the 2nd for five min and then turn it off. 0 z8 A* ]3 ]$ e _: ]6 ~- tTurn on the 3rd and leave it on. 2 ~7 F0 z7 F9 U$ O* h* ?7 l- ^And then go upstairs right away. # M0 {9 O; ]5 o# ^6 q H" C! \. O; U L7 z% r1 n* x
Find the answer by using your fingers and eyes! F% f. v+ i a* S0 T
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 ' ?- ~* t8 d% T9 q( R
Turn on the first for one min and then turn it off.! E2 g% w$ ^$ c* j) i
Turn on the 2nd for five min and then turn it off. $ x: s( E1 l1 F1 I' d1 @: }Turn on the 3rd and leave it on. 1 v# S' U) M7 gAnd then go upstairs right away.+ N0 c5 V% U. Y
+ h B/ U- P4 N' d4 T$ a$ @Find the answer by using ...