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Learn about the components of blood and their functions in the human body.
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คานอะคาเดมี่ - th.khanacademy.org
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A Khan Academy oferece conteúdos educacionais gratuitos em diversas disciplinas, como Matemática e Ciências, para estudantes de todas as idades.
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Matematik, sanat, bilgisayar, ekonomi, fizik, kimya, biyoloji,tıp, finans, tarih ve daha fazlasını ücretsiz olarak öğrenebilirsiniz. Khan Academy kar amacı gütmeyen bir kurumdur ve amacı …
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可汗学院 - Khan Academy
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