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听力原文：To welcome the new UN Secretary General Ban Kin-Moon, renowned Italian composer Alio Maricoli held his first American concert at the United Nations. In this report by Besera Kostava, the master of ceremonies, UN media chief Ahmad Southi, takes us through the highlights of this historical event.
Besera Kostava is the master of ceremonies for the concert.
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Where is the sense organs for vemeronasal system in snakes？
听力原文：The acids in acid rain are corrosive chemicals that leach nutrients from the soils, slow the growth of trees, poison lakes and combine with other chemicals to form. urban smog. The simplest way to curtail acid rain is to use less energy from fossil fuels.
The acids in acid rain are the only reason that forms urban smog alone.
听力原文：Wofsy says that politicians and scientists use different definitions of uncertainty. For example, a scientist might disprove one of several competing theories or even learn something entirely unexpected -- but still not be any closer to solving a problem.
Scientists know more about competing theories of uncertainty, so they are closer to solving a problem.
What will be on the next program？
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