Turn on the first for one min and then turn it off.0 m+ g3 i+ A: S8 x
Turn on the 2nd for five min and then turn it off." G" l6 }. Z: E& J6 k1 |
Turn on the 3rd and leave it on.! W" h" h& X# s0 s9 \7 g- r
And then go upstairs right away. ' t3 H) L5 d3 E: ?: R! ?+ S0 ~/ @3 ^9 K) X2 l4 v, h
Find the answer by using your fingers and eyes; `9 b* j) L% s. k$ e4 W/ 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 $ D. h9 G1 H1 f
Turn on the first for one min and then turn it off. 1 }0 T- u8 M4 y4 z8 d& o8 }0 I! }Turn on the 2nd for five min and then turn it off. ' p1 H5 t+ o* h+ T7 [& GTurn on the 3rd and leave it on. 3 q$ _9 n8 o* W( O, ^) T+ mAnd then go upstairs right away.0 i& B% V2 a6 X) k
% I- d: P$ U8 |- R* d( t+ J
Find the answer by using ...