Turn on the first for one min and then turn it off.) E! M m3 P( e! W1 r8 K8 o
Turn on the 2nd for five min and then turn it off. 2 d6 q( n8 z- A- R, gTurn on the 3rd and leave it on.0 {- a4 g9 J; [* g; X; j& o
And then go upstairs right away. F5 x; @% V1 n6 M+ M4 f3 V 4 i) s+ k: X; RFind the answer by using your fingers and eyes & G% m) P6 ]. P! {# S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 - k3 z7 W/ |. E9 l4 H& x: O
Turn on the first for one min and then turn it off.; o7 K' l) F1 e: z/ t! i
Turn on the 2nd for five min and then turn it off.1 U, h" z, l0 w# |6 Z& ^7 u" h
Turn on the 3rd and leave it on. 7 v6 R8 @5 y N f8 E+ ZAnd then go upstairs right away. 6 l" b4 C) [; f# H4 m/ X 1 g s/ u: P; d! |Find the answer by using ...