Turn on the first for one min and then turn it off.) _0 z& }/ S9 l5 D3 M+ z8 y5 j
Turn on the 2nd for five min and then turn it off.' E' y; ]9 v. E
Turn on the 3rd and leave it on.; r9 K8 I8 I: J3 L0 o8 l
And then go upstairs right away.* y% ?8 u# E" I5 u- X+ v- P4 V
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Find the answer by using your fingers and eyes 6 T+ [: G4 w, g6 G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 n9 {0 j0 _* v, L; [/ r" q* eTurn on the first for one min and then turn it off. 1 K' v5 Q' j" I, W3 E" yTurn on the 2nd for five min and then turn it off. 5 A5 Q' Y6 q2 j" ZTurn on the 3rd and leave it on.! k+ `6 G" N3 z# _
And then go upstairs right away. / m0 S# `( ^( |0 ]+ s. I2 N9 [2 o' i! W, _0 s6 {& r% ]
Find the answer by using ...