【简答题】Coyotes(丛林狼) used to live only in wide-open spaces of western prairies and deserts. They avoided forests, where wolves, their enemies, lived. But as forests were cleared to make room for farms and com...
【单选题】When early humans hunted and gathered food, they were not in control of their environment. They could only interact with their surroundings as lower organisms did. When humans learned to make fire, ho...