Turn on the first for one min and then turn it off.3 h2 w( C# h# u1 _
Turn on the 2nd for five min and then turn it off. ) ]; h, W% _3 W8 i, UTurn on the 3rd and leave it on. ' L. [! @+ |7 D: @$ O. O' XAnd then go upstairs right away. . e5 ]- p# w& K( f9 y1 s " u/ q, `" Q5 s& ], G6 Q3 WFind the answer by using your fingers and eyes 9 s9 V6 @& ?9 D$ s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 . t5 c' B& d- V( k& G8 `5 Y% t
Turn on the first for one min and then turn it off. 9 {0 L" _( q$ N4 e# p- zTurn on the 2nd for five min and then turn it off. : d+ @9 [, X' M# K5 R4 N& E7 qTurn on the 3rd and leave it on.% ^: w1 P6 f! G& {0 Z8 N) }
And then go upstairs right away. & b; h# X/ `: A0 W1 Q/ p) r7 N( s4 P# _7 E( H7 T
Find the answer by using ...