Turn on the first for one min and then turn it off.; I" A0 y' Q; f' ^" w# w& v0 q% T
Turn on the 2nd for five min and then turn it off.( |; o! I/ e: ]* s& a
Turn on the 3rd and leave it on. 9 o0 f' c: ]1 s A" G" wAnd then go upstairs right away. ! s+ M( y4 n- u + N ?* E& z7 ]Find the answer by using your fingers and eyes1 U0 U1 R& q9 i6 D( S- B4 q
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 % w1 t* h$ s uTurn on the first for one min and then turn it off. % J# ~( ?2 Y: c' h9 b8 xTurn on the 2nd for five min and then turn it off. - D9 O l+ N& W2 T2 |- Q: N7 R$ v% BTurn on the 3rd and leave it on.$ u! ]! `! P2 ^* D/ X, q
And then go upstairs right away.. w; o+ V6 j4 O& \! Q
, Y" m, \/ j8 Q
Find the answer by using ...