Turn on the first for one min and then turn it off. 1 t) l. b% P# s3 _) K4 ]) _9 n' W- zTurn on the 2nd for five min and then turn it off. 5 W5 ?: V$ y& ^) x- i& C% O' DTurn on the 3rd and leave it on.) @% O Q: i F
And then go upstairs right away. 5 U, {9 x; i, \8 o2 q& ?' ^ j: W' G
Find the answer by using your fingers and eyes0 n6 _/ h' U. C, y% C9 ?7 k
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 ! Y2 V: p) Y; V0 ?' JTurn on the first for one min and then turn it off. ! T+ n4 o) S1 fTurn on the 2nd for five min and then turn it off. 4 X/ h0 Y$ o* e: c& `0 |" STurn on the 3rd and leave it on. + V( ? ^+ v) V5 DAnd then go upstairs right away.6 G4 v- K; [2 a3 C
7 W/ y, ]+ M) q! r8 w% e2 S
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