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What is the main idea of the talk？A．Birds diff
问题详情
What is the main idea of the talk？
A．Birds differ in appearance throughout the world．
B．The best diet for birds includes both seeds and insects．
C．The bird"s bill is specialized to its preferred diet．
D．Birds have a variety of interesting behaviors．请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：C
解析： The main idea of the talk is that the bird's bill is specialized to its preferred diet. The professor says The bird's bill is highly modified for a variety of activities-such as cutting and crushing seeds, probing tree crevices for insects, drinking nectar from flowers, catching fish, and so on, Different birds have evolved different bill types to assist in their feeding. What I mean is,the shape of the bird's bill is specially adapted to specific foods. (2.1)
