Turn on the first for one min and then turn it off. ; }# o1 p! t. N4 e6 zTurn on the 2nd for five min and then turn it off.& ^8 F3 f, x7 \
Turn on the 3rd and leave it on. 3 j2 s7 S$ z% U s1 D3 G$ P" t6 H& ?And then go upstairs right away.4 s8 } Q! J1 F* J* Q) g7 v5 [! o: |
4 {. z" x6 a3 u, k
Find the answer by using your fingers and eyes) t. e% ~3 W8 ^- Q: @# r5 V
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 / E0 m6 g' q; y; g/ D
Turn on the first for one min and then turn it off. " i8 k( Y: O; T2 k) zTurn on the 2nd for five min and then turn it off.8 S) z. w4 S% ~ P7 v( y9 L
Turn on the 3rd and leave it on. 0 m0 n/ |9 T. ~And then go upstairs right away. : B5 y7 [5 r" k5 E" D% T: n" x2 H7 x5 _0 y) R) j
Find the answer by using ...