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Que el calor derrite las neuronas es un hecho constatable, al menos en el entorno en el que yo me muevo. Tan constatable como que estamos en fechas de opos y e..."
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PISA-2009
65 países participantes en PISA 2009
Países de la OCDE (Organización para la Cooperación y Desarrollo Económico):
Alemania, Australia, Austr..."
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