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Día a día por el medio ambiente: 8.05. Se otorga una recompensa por participar; además, se dan 5 puntos extra por cada respuesta correcta

2016-08-05View Original

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Pregunta de selección múltiple: En el caso del agua subterránea y del agua a presión que ya está contaminada, no se debe ( ) extraerla. A. Por capas. B. Mezclado. C. Capa por capa al mismo tiempo. D. Mezcla de capas. B

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