Turn on the first for one min and then turn it off.: l8 X# y: n1 }3 C- U0 O/ n" O
Turn on the 2nd for five min and then turn it off.6 G" u+ p+ R7 G3 F5 V
Turn on the 3rd and leave it on.7 M! S# y+ M0 p) M
And then go upstairs right away.6 C7 H' ~1 `! o9 {
# w4 S! C. W- T8 G) mFind the answer by using your fingers and eyes ( B2 q2 j# k' R" C$ u* u: {" x3 h6 d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 ' b7 \- m: U# F% kTurn on the first for one min and then turn it off./ L0 {6 }# X# c2 f# [4 x7 {9 l
Turn on the 2nd for five min and then turn it off. ( B( Z, K: r) |* Z' r2 I7 sTurn on the 3rd and leave it on.; Z7 g; B- f" z" y) a$ E
And then go upstairs right away.! F# f4 H. q5 T9 N