4.The passage mainly tells us that
.
A. pandas are endangered
B. pandas had a long history
C. pandas had bamboo to beat predators
D. today’s Pandas are similar to the oldest ones
答案解析:答案为C。本题为推理题。由文章最后一段的总结 “Once an animal begins to rely on a common and stable food source, such as bamboo, it tends to evolve a larger body size,” he said. “As individuals of the evolving species grow bigger, they have a better chance not to be eaten by predators (肉食动物) due to their larger body size.” 可知,每一种动物一旦有了普遍而稳定的食物源,体型就会增大,这种庞大的体型可以帮它们战胜肉食动物,这种规律同样适用于大熊猫。故答案为C。
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