Turn on the first for one min and then turn it off. $ G, p9 U) T1 ?3 _% `9 ITurn on the 2nd for five min and then turn it off. 3 l, C' e$ ?( c" P! j6 e1 ZTurn on the 3rd and leave it on.0 m: H0 |7 Y9 u5 `3 S! J
And then go upstairs right away. 6 _, J5 A3 O* O 2 a, v/ H2 a) o: l) ^- W: k* c* UFind the answer by using your fingers and eyes; P% E3 X2 J- G2 P9 a+ C. w" L+ 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 $ A: X# Q* C1 ?. E4 B7 hTurn on the first for one min and then turn it off. * d" |+ L! \) h, V6 v. H( q$ STurn on the 2nd for five min and then turn it off.7 ^4 g1 C, U) ^! N+ D8 u( S# r4 a
Turn on the 3rd and leave it on.2 n' c. h. [, F6 Y5 y
And then go upstairs right away. 1 E9 _4 S n/ L) Y' D6 `+ c; [ 9 ~7 H3 C7 ?6 }' XFind the answer by using ...