Turn on the first for one min and then turn it off.4 h7 s" U5 @! ~3 M; a9 ^" E
Turn on the 2nd for five min and then turn it off. 5 a+ _, T( Q/ b" K% T6 g6 U( ATurn on the 3rd and leave it on. # y* }% A" y a7 D* q2 eAnd then go upstairs right away. 9 |) s1 C5 Q& Y T& {/ N4 H, \% g) \: a
Find the answer by using your fingers and eyes # i5 d5 n3 h/ i, ]) a; M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 |( ^9 L5 o5 S8 m. m8 T" M
Turn on the first for one min and then turn it off.2 L4 l3 h" F7 U2 a- D( W1 g
Turn on the 2nd for five min and then turn it off.2 T+ Z8 ^/ b3 P" e6 X
Turn on the 3rd and leave it on. 3 D1 g1 W0 s- E0 V, n% ]And then go upstairs right away., b0 q. T2 B9 u
0 x2 @, c& J" {4 R8 f/ `5 M/ a
Find the answer by using ...