Turn on the first for one min and then turn it off.4 f ~- P1 R: |
Turn on the 2nd for five min and then turn it off. $ y& ^* ] A% m9 Z# bTurn on the 3rd and leave it on.) s1 P" ^ |6 ^. i- G
And then go upstairs right away. 5 k7 o# l- u% A 9 ]9 r9 ? w' }Find the answer by using your fingers and eyes4 P0 h0 S0 B5 v6 k2 D7 e! X* W+ L! t
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 / b; s+ V- O) f+ j9 ^" v
Turn on the first for one min and then turn it off." e9 r* b& i5 f- ^1 d
Turn on the 2nd for five min and then turn it off.! z/ e Z1 ?( K% M
Turn on the 3rd and leave it on.2 w4 U2 w4 L1 Z1 r1 K% W: N3 E& F
And then go upstairs right away. 8 ^ [5 D) [" T* H# H, s1 e G A7 W" V' m4 F) f! j
Find the answer by using ...