Turn on the first for one min and then turn it off.& h* ~1 _' g, q- n
Turn on the 2nd for five min and then turn it off. - l! m6 B! P/ ^& tTurn on the 3rd and leave it on. ( n; ]/ L- c: ?0 Q2 D9 Z9 r% NAnd then go upstairs right away. ' C3 |' E R E, U 5 b) L3 E$ F* X0 ~/ a: I; f3 tFind the answer by using your fingers and eyes & p2 t1 c: @) S0 f6 G7 y: w$ J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 % c" i( d( r/ y2 B; ?Turn on the first for one min and then turn it off. & |2 i# o% w4 ]( W* Z, ZTurn on the 2nd for five min and then turn it off. + q2 j! O6 _7 c) m9 v2 E" B) U# rTurn on the 3rd and leave it on. 6 D- F$ Z/ r) p/ V0 AAnd then go upstairs right away. - x& `9 K8 ^) N# Q! [) u; b0 {* V) b/ z# a
Find the answer by using ...