单词：ion-exchange adsorption
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Unit One EDUCATIONAL EXCHANGE PROGRAMS Sorry,there is not text temporarily, Please help tingroom to look for it! 如果您能找到更好的听力原文，请发贴到 听力原文收集区 ，您将会获得 10 到 30 积分的奖励 ! Thank you ！
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10-16-2010 The US Treasury Department(财政部) says it will delay the publication of its half-yearly international economic and exchange rate policy report to Congress（国会） which was due to be released Friday. The Treasury Department says in
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