Turn on the first for one min and then turn it off.+ z j2 C) o/ h* X! g0 v- F a# B4 K
Turn on the 2nd for five min and then turn it off.7 y' t/ K! q! v: h" {7 r5 [
Turn on the 3rd and leave it on. / p7 C; E/ y- {4 KAnd then go upstairs right away.9 ^1 r! z% |) e( J. b7 q
( @' K1 r/ |& V0 C9 jFind the answer by using your fingers and eyes3 I8 [6 H( @7 F0 G5 T b
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 # L/ I1 [; N/ I4 S& v; `
Turn on the first for one min and then turn it off.6 H/ x5 d8 h) e5 r
Turn on the 2nd for five min and then turn it off. 1 r% @' H" @; n( d2 S( a3 ITurn on the 3rd and leave it on. 6 I" H4 x7 j' D+ h$ g8 nAnd then go upstairs right away.* c. i# W! G% a# k! Z" L
& j: M/ }$ f! r$ `+ u4 TFind the answer by using ...