Turn on the first for one min and then turn it off. ! Q6 j4 ?# E5 Z" E C; ~Turn on the 2nd for five min and then turn it off., ]% [) G6 `# k L: {3 z
Turn on the 3rd and leave it on.; I$ {8 e2 E; [# n; G# A
And then go upstairs right away.9 w. S+ }+ q w" f6 G
; c2 h, t6 s( z. u# A! [) ^
Find the answer by using your fingers and eyes ' I P7 }! u4 g' E, j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 E2 q7 Y/ _, K5 B& gTurn on the first for one min and then turn it off.; E0 z' c/ o8 }* h6 i
Turn on the 2nd for five min and then turn it off. " ?8 {+ r; H! ~$ x& ?! iTurn on the 3rd and leave it on.9 Q2 B& ~9 M3 t% @
And then go upstairs right away. 4 T5 z v0 S t* v$ O$ r4 w0 \ 0 q a0 v) c# m- N5 _8 _Find the answer by using ...