Para repasar los sistemas vistos en el periodoSu Profe Carola24 may 20190 Min. de lecturahttps://www.youtube.com/watch?v=krqempHBRAc https://www.youtube.com/watch?v=8XlDRdrw3f8 https://www.youtube.com/watch?v=IY8ogkSqfvo https://www.youtube.com/watch?v=nsSg4Eq3LEo https://www.youtube.com/watch?v=zabVr2bGrik
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