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Día a día por el medio ambiente: 7.29. Se otorga una recompensa por participar; además, se dan 5 recompensas adicionales por cada respuesta correcta

2016-07-29View Original

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Pregunta de opción múltiple: Al extraer aguas subterráneas en varios acuíferos, si la calidad del agua en cada uno de ellos difiere mucho, se debe proceder a la extracción de manera ( ). A. Mezclado B. Poco a poco, simultáneamente C. Por capas D. Mezcla de capas. C

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