Turn on the first for one min and then turn it off.( E8 j& Y* A- G0 b# @
Turn on the 2nd for five min and then turn it off. ' ~5 {6 T6 J5 ?" A- UTurn on the 3rd and leave it on. . h' C, e9 n: D# pAnd then go upstairs right away. 6 M z- W' G X9 W8 B 2 {# Y# _( h& W# `' K9 p# IFind the answer by using your fingers and eyes3 ^+ B( ?: N/ o1 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 : J2 V# L5 q9 e5 N) a
Turn on the first for one min and then turn it off.9 Q9 ~1 B. f; ?) c
Turn on the 2nd for five min and then turn it off.# i, B6 b2 A# D) Q( [( E! w
Turn on the 3rd and leave it on. 3 A; o6 Y/ A7 R C* u5 N* v. QAnd then go upstairs right away. n2 \: l' p$ ` u s 9 k2 F% [4 e0 b, `& {Find the answer by using ...