Turn on the first for one min and then turn it off. 6 d ^3 n6 N0 V$ {/ r9 YTurn on the 2nd for five min and then turn it off.( J: N% L: |7 n# a& _' c
Turn on the 3rd and leave it on.6 E% P. `, X; y8 a
And then go upstairs right away.% W5 k" x8 t- S
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Find the answer by using your fingers and eyes 0 i2 b: t$ }6 ^. u6 d! e2 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 % [( ~1 @1 s/ KTurn on the first for one min and then turn it off. 3 d0 o. b7 {9 ?Turn on the 2nd for five min and then turn it off. e/ ~0 O A- ~' j. ?Turn on the 3rd and leave it on.' L; V7 q1 s+ G1 _ Q% z
And then go upstairs right away.! x$ s9 a/ G4 F$ x0 J( A) K