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• ▶ 'No more caving': Poilievre tells Carney to show 'backbone' in U.S. trade talks CBC News: The National · 2026.08.10

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• DNA and Life Science They are usually represented by their first letter: A- adenineT- thymineC - cytosineG - guanine Holding the nucleotides together is a backbone made of phosphate and deoxyribose. blog.naver.com · 2014.05.07