Turn on the first for one min and then turn it off.! x0 {; f0 U+ s |5 W
Turn on the 2nd for five min and then turn it off.0 K& s; i2 Q3 n1 d J4 E9 U. ~9 p
Turn on the 3rd and leave it on. , V1 I5 e' a3 UAnd then go upstairs right away., F$ J, c ?/ a2 r0 I% A. @, o& W
' m; ^) `' }. O( ~
Find the answer by using your fingers and eyes% {, N& ~1 w* G
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 7 ^0 E5 Q: b( m
Turn on the first for one min and then turn it off.! f7 ]2 g2 t9 Q, U$ b. i
Turn on the 2nd for five min and then turn it off. ( G- A! V/ [" t& K, A+ gTurn on the 3rd and leave it on.$ l, _1 Y, f3 P; ? f7 I
And then go upstairs right away. ?( \, O9 S+ B* X! g 4 Y& r5 W) M) V& Y/ k+ mFind the answer by using ...