Turn on the first for one min and then turn it off. ! r8 K7 H8 W) o, w( T: h0 nTurn on the 2nd for five min and then turn it off. $ E7 K. H. a4 U. tTurn on the 3rd and leave it on.; T8 \4 s4 Z6 ~, ]4 W" S: q
And then go upstairs right away. : U G7 s# j$ \( u$ X7 C* K% d/ W9 V, v. P0 |
Find the answer by using your fingers and eyes 0 ~( f9 x8 h0 ~6 W' T% c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 1 P; j" X) A8 D- FTurn on the first for one min and then turn it off. ! f0 k- Q$ s9 b0 \& [! K. |Turn on the 2nd for five min and then turn it off. & A8 N3 a* \. K- g* \4 vTurn on the 3rd and leave it on.% N6 H6 C; [* V7 U3 w) W
And then go upstairs right away.+ Z( r" n% N. m
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Find the answer by using ...