Turn on the first for one min and then turn it off. , p H3 e' v QTurn on the 2nd for five min and then turn it off. 3 z$ D$ v2 Z _5 Q9 r1 eTurn on the 3rd and leave it on.5 _# P! Q: R3 ~ z
And then go upstairs right away. 0 l1 y2 V4 R0 p- s6 F6 R9 M $ d8 c1 W, a5 f6 p7 |Find the answer by using your fingers and eyes 3 Z) p6 R1 z$ I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 . q4 W, @+ i) r4 ~Turn on the first for one min and then turn it off. ' h S& ?8 H4 N( u5 l# tTurn on the 2nd for five min and then turn it off.; J- Y/ N% W* h3 f" N, m2 k1 b! j
Turn on the 3rd and leave it on. ; j( K5 Y% r- Z4 I6 u% P5 y- X: ~; yAnd then go upstairs right away., V. p( o5 g$ G6 G3 u4 P- T
! Z: t7 z& t: U/ {
Find the answer by using ...