Turn on the first for one min and then turn it off.* C1 w8 C* h( ]2 D$ W, ?
Turn on the 2nd for five min and then turn it off.. [/ h$ u2 B& n* \
Turn on the 3rd and leave it on.6 G' H; b. {' O) [
And then go upstairs right away.4 j# Q5 a3 C8 ~
* |0 `8 s* C# ~. B7 i7 |Find the answer by using your fingers and eyes& j0 w0 ?4 ^& x
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 0 I8 H0 C) T' |# ZTurn on the first for one min and then turn it off.3 c" Z. A" f4 f# f3 K- L
Turn on the 2nd for five min and then turn it off.- b6 {4 @4 K/ a: G! ?+ Z& H2 _. W
Turn on the 3rd and leave it on.+ S. o. z( W4 w0 S5 X
And then go upstairs right away.+ e( b4 l- ?! q& x$ [& l& w6 F, |
# a! j0 V9 f, }, g8 ?6 B3 oFind the answer by using ...