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чулуулгийн бат бэхийн хүснэгт mpa. Brown Master of Public Affairs MPA . The Brown University Master of Public Affairs MPA at the Watson Institute is a one year summerfallspring full time program that provides students with the analytical foundation and management tools they need to tackle the policy problems of today The program …
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Хар тугалга нь (латинаар: plumbum) химийн элементийн үелэх системд Pb гэж тэмдэглэгддэг, атомын дугаар нь 82 болох химийн элемент юм. Зөөлөн, хувийн жин ихтэй, хортой хүнд металл болно. Байгаль дээр исэл, cульфид байдлаар тохиолдоно. Хар тугалга нь уран, тори зэрэг цацраг идэвхт элементүүдийн задралын эцсийн бүтээгдэхүүн юм.
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