Turn on the first for one min and then turn it off. + `2 G" `$ o! X, f9 f3 HTurn on the 2nd for five min and then turn it off.& j9 @* I/ Z+ ~: O1 ~ P
Turn on the 3rd and leave it on. 8 g8 T/ \: Q& ?* H# P" P/ ^And then go upstairs right away. ' s( o$ q+ v6 J! p/ z + Y- X6 Y0 O8 y" KFind the answer by using your fingers and eyes % e4 |$ w* Y* b! j: {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 ( V6 X) Q9 A# \" i
Turn on the first for one min and then turn it off. 2 ?/ C- d+ w# Q) T4 z9 [Turn on the 2nd for five min and then turn it off.5 q# N2 l. J" c0 F
Turn on the 3rd and leave it on., `! X. N; d3 \4 w9 L
And then go upstairs right away.0 L( z4 E, Z5 S) k* E3 L9 ]
9 a W$ W0 Y8 z% u, |$ NFind the answer by using ...