Turn on the first for one min and then turn it off.4 r6 c/ s o8 f3 o
Turn on the 2nd for five min and then turn it off.8 }" i# [( c" l3 e- B: t
Turn on the 3rd and leave it on." Q m# g6 ^7 E" d( o2 [* r0 [) H; Q+ y
And then go upstairs right away.3 W, r' v% @# c* F; M# I1 {( Y
: |; A0 r% V/ Y& a; bFind the answer by using your fingers and eyes 3 n" o% O; J2 Y9 R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 , e. w% o0 T3 a6 {4 L' S8 o
Turn on the first for one min and then turn it off.0 T) m5 e0 B% p; } S) G4 q
Turn on the 2nd for five min and then turn it off. + [% t2 D9 e! u- A* n# RTurn on the 3rd and leave it on. ' o, `7 o( Q; q/ I7 f8 q" RAnd then go upstairs right away.$ e" E# d& p8 e0 C* n
6 A: v; L8 V( [% ]& L2 YFind the answer by using ...