Turn on the first for one min and then turn it off.) c: F. {/ M' r# ]+ x) C
Turn on the 2nd for five min and then turn it off. 9 a0 @$ y0 c4 [0 ?4 JTurn on the 3rd and leave it on. 1 Z, x% l) U' V& ^( Y4 p- f4 MAnd then go upstairs right away. # R; [ a: n" R/ O8 r* Q( `. z. m. I1 o2 L; c- q
Find the answer by using your fingers and eyes 6 i) I3 b$ B/ M- g6 C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 + ]) N& E( ^* N+ R5 E
Turn on the first for one min and then turn it off. * b6 d7 j( i l; ~: L hTurn on the 2nd for five min and then turn it off.7 V5 s; Q4 r U+ J8 G
Turn on the 3rd and leave it on. 5 T1 ^, V; z5 A( X! N+ hAnd then go upstairs right away. ! G' ]- h! h1 ^& J# w/ P* v: o- D3 t/ B7 i/ R+ D1 B
Find the answer by using ...