Turn on the first for one min and then turn it off. : L$ E6 k0 R- T3 Y# hTurn on the 2nd for five min and then turn it off. 7 v- \" ]9 c$ M3 `. S2 x- BTurn on the 3rd and leave it on.6 _2 `3 P2 H5 M4 X* W
And then go upstairs right away. 1 `2 m/ C4 _9 {2 c7 b6 @3 e t - W" L" `3 `0 }# ]# W |Find the answer by using your fingers and eyes 5 R1 x4 K& V" p9 ?- a% ]2 R0 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 : n2 C }6 B; d: _# V
Turn on the first for one min and then turn it off. ! \5 b* h# b9 {% Y DTurn on the 2nd for five min and then turn it off./ L# C5 e1 L. z8 b1 Z8 Z2 C# G7 S2 ^1 q
Turn on the 3rd and leave it on. , \/ j; w( N, E! w2 ]And then go upstairs right away.) K1 U% Q- C( O* D) M
* v3 p6 Z; g+ d4 `( a" KFind the answer by using ...