Turn on the first for one min and then turn it off.& b, ^, Q3 q& D9 c. S( ?
Turn on the 2nd for five min and then turn it off. % C( a! g4 ]7 \Turn on the 3rd and leave it on. - {& q/ f. l3 U% gAnd then go upstairs right away. . I, Y9 _6 K \8 { , J0 D8 r d: TFind the answer by using your fingers and eyes J, D6 ]5 D7 t3 D& {$ |
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 5 s6 B/ G& r% eTurn on the first for one min and then turn it off. 5 w2 d' t, B2 h9 ^5 `8 sTurn on the 2nd for five min and then turn it off.6 |( l/ X% \) Z+ ?% F1 X; }
Turn on the 3rd and leave it on. 9 z1 n) W9 H5 LAnd then go upstairs right away.8 `9 Y( C m8 S9 Q9 H, Q
, ^# c1 o0 e. n) E/ ?- M& b- j5 f
Find the answer by using ...