Answer:
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The surface of alveoli is thin and moist, alveoli has a very large surface area in total;plenty of room for gas exchange, and the surface of alveoli is covered with capillaries.
Un cuerpo es impulsado al vacío sobre un plano horizontal sin fricción por una fuerza paralela a un plano que actúa instantáneamente sobre él, en este caso se puede concluir que.
