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0 / 60 seg.
What Pavlov did was make the bell food-related.
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Clue
NO PROTEGEN A NADIE,
PERO ¿SI QUIERES HACER UNA APLICACIÓN?
ELEGIMOS SI NECESITAMOS DAR UN GIRO.
LO QUE PAVLOV HIZO RELACIONAR LA CAMPANA CON LA COMIDA.
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