Turn on the first for one min and then turn it off. $ w! u/ M" V4 lTurn on the 2nd for five min and then turn it off. + Q6 m4 g9 p- \# u* q0 Q1 mTurn on the 3rd and leave it on. 7 \* L3 s( Y. \5 [9 yAnd then go upstairs right away. ( z; m9 k8 c+ Z 6 |+ R& @; u0 xFind the answer by using your fingers and eyes: Q! \/ p5 d6 h
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 I7 [9 v3 I6 ~5 mTurn on the first for one min and then turn it off. & m3 S4 j% P& [4 r, ^. D: f# pTurn on the 2nd for five min and then turn it off.4 J* j8 H1 x5 V
Turn on the 3rd and leave it on.1 ~3 K0 f5 f2 _% a
And then go upstairs right away. : t# D( J/ V2 X0 I8 I " [9 j! y) K' {3 KFind the answer by using ...