有4个人a, b, x, y, 这4个人各有不同的具有传染性的皮肤病, 不能有任何的皮肤接触,现有2个橡皮手套, 问: 如何戴手套,才能让a, b分别和x, y握手而不互相传染?
a z2f z1f--->x,( a put 2 gloves on,f of 2 and z of 1 are clean, f of 1 touch x, z of 2 touch a) b <------z1f x, ( a take off the glove 1,x turn it over and out it on,touch f side. let b touch z of 1) a z2f------->y, (a already take off the glove 2, use clean side f of 2 touch y) b <--------z1f z2f y ( y turn glove 2 over, put it on, touch f side of 2, put glove 1 outside glove 2, z of 2 is outside, touch b) |
last step: b <--------z1f z2f y ( y turn glove 2 over, put it on, touch f side of 2, put glove 1 outside glove 2, z of 2 is outside, touch b) |this "2" should be "1" ------------------------------"1"---------- |
a戴两手套,和X握手,取下外面的一双,和Y握手; b戴a取下的第一双手套,和X握手,再戴上第二双手套,和Y握手。 |
how can a&b and x&y shake hands to each other? |
题目中的问是“ 问: 如何戴手套,才能让a, b分别和x, y握手而不互相传染?” |
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