Turn on the first for one min and then turn it off.* Z, X3 w' I8 m( X; L+ i% [! K) s
Turn on the 2nd for five min and then turn it off. 4 v; A L1 L' K! c5 `6 cTurn on the 3rd and leave it on. 9 W. J9 m7 p1 hAnd then go upstairs right away. 2 }! s1 M$ B- H* l3 _" t9 b* y0 X& ?" h5 ]0 F; ~
Find the answer by using your fingers and eyes. I6 B! f6 m+ _, |0 Z, D( R& Q
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 $ s4 ~) M( s) F, q+ o& ]6 V
Turn on the first for one min and then turn it off. 9 I" e. ` {6 K) @8 D# l- N. T: _. pTurn on the 2nd for five min and then turn it off. : Z4 G. `4 F0 l! j- ]Turn on the 3rd and leave it on. : O; a) `, S* A; FAnd then go upstairs right away. 2 |8 A8 G/ Q- y [3 h) T' t9 Y. W% Z" J# A' C3 c: o
Find the answer by using ...