Turn on the first for one min and then turn it off.1 [# g% j, X/ R" t1 J. I) d
Turn on the 2nd for five min and then turn it off. - E$ a6 h8 r8 A8 ?* p g4 \Turn on the 3rd and leave it on. 4 X% ]" z$ T: t7 p( b8 }7 pAnd then go upstairs right away. % }" D5 j A! x j; R9 N1 D0 Q7 F. z! N
Find the answer by using your fingers and eyes 9 z, \- ]4 ]- G, 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 0 i3 Y+ Z( E; w% X6 Y) i0 X3 KTurn on the first for one min and then turn it off. % p, I0 m( ~) v0 M- D6 K2 O# l) q2 jTurn on the 2nd for five min and then turn it off. 3 y9 }1 k% s4 p( z) }/ QTurn on the 3rd and leave it on. - h2 S6 n6 W% w# Q8 o+ ?And then go upstairs right away. ; x; W% L3 }) _ # H, J) F& f+ ^/ l- n1 GFind the answer by using ...