Turn on the first for one min and then turn it off. / M: m# s% ]# Y5 a/ d7 ^& PTurn on the 2nd for five min and then turn it off. - @' r3 A7 ^# l2 D5 ]; ^! `Turn on the 3rd and leave it on.7 t1 W6 U/ q. y* c% }# g4 v
And then go upstairs right away. & r+ W, v+ B' Y ?- n5 y6 s; n; R! [! u4 [% s ?* c- {* N9 J
Find the answer by using your fingers and eyes0 b" E- c) @9 _: j3 K
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 o2 Y1 _6 u6 D
Turn on the first for one min and then turn it off. $ {- g4 |; R; U- l6 i2 kTurn on the 2nd for five min and then turn it off.0 l5 H: R9 K2 @6 D1 Z0 o+ D
Turn on the 3rd and leave it on. ( T8 r! e3 w8 L" |* |And then go upstairs right away. ( N% Y, Z0 m* l0 A: @2 H# _" c5 }* F) l
Find the answer by using ...