aylen
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Inventos y descubrimientos científicos
siglo xx
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1903:avión,hermanos wright(E.E.U.U)
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1922:radar :A.H.Taylor y c young(E.E.U.U)
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1928:penicilina ,A.Fleming (g.b)
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1657:vuelo espacial (U.R.S.S)[Ver]
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1960:Láser,bell telephone co (E.E.U.U)