Turn on the first for one min and then turn it off. 0 R0 Q- T+ X" \3 C; N: uTurn on the 2nd for five min and then turn it off.* f Y' i! r( I0 n. z' m& f6 X
Turn on the 3rd and leave it on.! r+ H+ x8 ^; j
And then go upstairs right away.) b- ^9 Y# h! m0 B% E
x* U5 A* J0 H4 ZFind the answer by using your fingers and eyes 7 h9 B+ M& [' P; ^: i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 3 B7 |, }7 x7 Z# v& e7 a3 O( J1 ATurn on the first for one min and then turn it off. 1 P) h N$ V: @' r6 DTurn on the 2nd for five min and then turn it off. - k% o" K% Q! M5 Z* YTurn on the 3rd and leave it on.$ w3 [5 \! }) X- V7 s# f- z8 L) B/ m
And then go upstairs right away. + S4 Y% P8 J& F- d5 Z" d+ a' N7 {) a% n' Y2 S- Z1 b; R s
Find the answer by using ...