唔該！幫幫忙解答我以下2個問題唔該!

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唔係好明個問題同"答案"' s% y8 r8 `% y) v* R

+ a0 U* }. j6 S& o# f: e1. http://nz.youtube.com/watch?v=lj3iNxZ8Dww&feature=related
, D1 t5 k1 @6 J' }9 WAimee Teegarden: "Recent polls have shown a fifth of Americans can't locate the U.S. on a world map. Why do you think this is?"( L, Y7 `& g: w0 ]* g) b4 }

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Caitlin Upton: "I personally believe that U.S. Americans are unable to do so because, uh, some, people out there in our nation don't have maps and, uh, I believe that our, uh, education like such as, uh, South Africa and, uh, the Iraq, everywhere like such as, and, I believe that they should, our education over here in the U.S. should help the U.S., uh, or, uh, should help South Africa and should help the Iraq and the filter-074 countries, so we will be able to build up our future, for our children."
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3 Z& g6 ~& }: z8 a% M$ ?2. http://nz.youtube.com/watch?v=itjlj6i9XFo( d% B2 z" u& p9 F$ @* S( B
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Q:"How many feet are in 2 1/2 yards?; y. J9 N7 T5 f# p, @
A:"78"
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WHY NOT IS 7.5? I THINK IS 3 FEETS EQUAL 1 YARD?