Turn on the first for one min and then turn it off.9 i& y' T* O5 a: Z9 x. C4 |
Turn on the 2nd for five min and then turn it off.& \, f' j' M0 x5 s/ ^! f
Turn on the 3rd and leave it on.1 D5 L' P4 \$ u5 Q: W9 C
And then go upstairs right away., N/ S* B; v; |8 `( M) a' t$ w C. h
% M; T* A, R/ Y- b* uFind the answer by using your fingers and eyes 3 @% Z2 Z4 r4 c/ U% m: L5 A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 + ]$ |* g& H- f) A" k5 ^Turn on the first for one min and then turn it off.; _$ |8 b+ ?; V1 O1 f6 k/ [1 W
Turn on the 2nd for five min and then turn it off. : Q' c0 x9 r+ Y i/ M: x' b" QTurn on the 3rd and leave it on.3 W. k" y2 G: w8 O9 L( b0 ~7 p
And then go upstairs right away. ! v+ L* d; f; {0 W3 v4 ]& a4 K 3 z) n9 R% i5 N9 o# e# EFind the answer by using ...