Turn on the first for one min and then turn it off.2 ]/ D; Z1 z; u
Turn on the 2nd for five min and then turn it off. 1 u/ A0 m% o7 z& b+ v5 UTurn on the 3rd and leave it on., x( t( q/ l# T Q8 A# c2 ~
And then go upstairs right away. - M* S- O9 w% I0 c+ ]3 C7 u& r# g. Q
Find the answer by using your fingers and eyes1 p) U/ @2 J- e, ^8 }" P' |
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 8 K* x0 @' @/ T) w; Q0 r
Turn on the first for one min and then turn it off. 3 f6 k( i* D G4 A: F+ i, ?Turn on the 2nd for five min and then turn it off.4 m/ E2 v7 p0 ~
Turn on the 3rd and leave it on. ( E) ` d% g9 S$ NAnd then go upstairs right away.# g8 m6 @' R4 W0 z
v9 A6 k) G( h4 ?2 \9 oFind the answer by using ...