Turn on the first for one min and then turn it off. 5 f/ U; O2 N& b. U% Y7 @Turn on the 2nd for five min and then turn it off.3 v6 W( _$ D, a" t" x& A
Turn on the 3rd and leave it on. / R3 y0 B. `9 r) XAnd then go upstairs right away.9 j! Y5 s3 T) \" T6 r
# L1 H/ a0 g/ p$ R! p
Find the answer by using your fingers and eyes " _! Z6 J- w: H4 W. U, a: N1 u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 I5 t3 h* j, l8 n
Turn on the first for one min and then turn it off. # g& M# T+ r( [$ C5 i# v3 [* YTurn on the 2nd for five min and then turn it off.3 D/ p+ x5 d. Q
Turn on the 3rd and leave it on.. o6 W' X5 Q2 i9 d/ E) \
And then go upstairs right away." x4 F' {4 `8 z% b( r1 p