Turn on the first for one min and then turn it off.3 ~$ V I0 l7 o+ t$ m
Turn on the 2nd for five min and then turn it off. 4 |2 h: F) H& \/ T6 Z; eTurn on the 3rd and leave it on.7 o; f% U3 f4 Q+ Y4 ~
And then go upstairs right away.8 q9 b0 ]/ J) ]$ h+ E3 q/ @
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Find the answer by using your fingers and eyes4 T" B1 ?/ X" y) L( j- U0 g; u
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 1 T; P0 d% B7 j7 @Turn on the first for one min and then turn it off.- g5 p4 Z/ l% Z' H5 J
Turn on the 2nd for five min and then turn it off. 9 ^5 [# T1 j, r% _Turn on the 3rd and leave it on. . W) l( ^& u; d- {! d9 ^And then go upstairs right away.# I, p8 j. `6 A3 x
8 S$ W7 s4 Z3 j! E
Find the answer by using ...