Turn on the first for one min and then turn it off.7 Q# J8 p$ h9 I0 f" i( r8 I7 B; a
Turn on the 2nd for five min and then turn it off.- g. M, _4 a) k, v* d: Z* m* p" T7 ^1 {
Turn on the 3rd and leave it on.; `# j5 L9 ~4 h6 H+ d6 c3 g3 Y
And then go upstairs right away. 5 y% W- b3 v4 j5 `6 I$ m0 W: ~* T2 ]0 f8 p$ b8 Q
Find the answer by using your fingers and eyes7 |! w% M3 `' Q' m6 A* g
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 ! Z. J; Y' _0 Q5 \9 y. l1 k
Turn on the first for one min and then turn it off. # [( j# H ]& Y: c+ q Y9 C4 ETurn on the 2nd for five min and then turn it off. _6 c v1 J$ ?; M0 R& O4 I
Turn on the 3rd and leave it on. $ {1 j9 {3 c. |. z3 y( u2 PAnd then go upstairs right away.: s p- \* T0 }$ i9 d W
5 H- {3 b/ ^$ R2 X0 d- \5 G7 ZFind the answer by using ...