Turn on the first for one min and then turn it off.! B- i5 j, U1 ^* X8 h# _. _
Turn on the 2nd for five min and then turn it off. % D( v9 |8 `% Y; r8 HTurn on the 3rd and leave it on./ v, L$ V2 Q* \$ u
And then go upstairs right away. - |! ~# G5 X! T5 e; k4 q # [2 r3 ~9 e2 c$ o: W! P& uFind the answer by using your fingers and eyes * `! ] u6 _* T6 C3 T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 0 L0 y, [ b* M) e( p8 v$ a7 iTurn on the first for one min and then turn it off.$ v$ t% j" x3 d
Turn on the 2nd for five min and then turn it off. : I( I7 `& g) k+ w1 U+ C6 bTurn on the 3rd and leave it on. / K: b$ j+ d& r$ \1 jAnd then go upstairs right away. . @$ b2 t* k ^$ Q% |) t2 U " r* q. V" \; k- P% sFind the answer by using ...