Turn on the first for one min and then turn it off./ }, ]& q; Z+ @7 l: ]* q
Turn on the 2nd for five min and then turn it off.4 L) _+ O" S5 ^ z/ v7 i' H
Turn on the 3rd and leave it on.- {, y( I _! x8 F; L
And then go upstairs right away. / N% { h( H8 K! `+ _1 r' O( X! R% t; e ]0 l
Find the answer by using your fingers and eyes2 m z1 ]( F" {
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 5 z6 X! N( X7 f2 W9 i+ DTurn on the first for one min and then turn it off. 0 f9 ?( H# j% ?1 V, I/ JTurn on the 2nd for five min and then turn it off. 5 }& G* R% l+ O* jTurn on the 3rd and leave it on. " N: r, ]+ w$ m9 jAnd then go upstairs right away.( N. I# j, F3 V7 o) o
) \" M; ]1 K! y7 U% O# j
Find the answer by using ...