2. 外语
  3. A bird’s plumage, while contributing to structural integrity and participating in aerial locomotion, completely obscures a bird’

A bird’s plumage, while contributing to structural integrity and participating in aerial locomotion, completely obscures a bird’

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问题 A bird’s plumage, while contributing to structural integrity and participating in aerial locomotion, completely obscures a bird’s internal activity from human view, greatly impeding our attempts to understand birds as functioning animals. Plumage has even made it difficult to describe bird movement. When describing the movement of mammals, writers turn to well-worn clichés like “grace in motion.” A mammal’s rippling muscles slide smoothly over one another in eye-catching ways. With a mammal, whether a mouse or hippopotamus, we recognize that the underlying body parts are similar to our own and we know these parts will act predictably. Not so with a bird. For centuries, we knew little more about a bird’s movement than that it was a mystery that seemed to be based on the flapping of wings.
The passage mentions which of the following as an effect of bird plumage?
选项 A、It contributes to a bird’s ability to fly.
B、It hides the inner workings of birds.
C、It contributes to the structural soundness of birds.
答案A，B，C
解析 A．It contributes to a bird’s ability to fly．贡献于鸟类飞行的能力。
解析：定位第一句，ability to fly对应aerial locomotion，正确。
B．It hides the inner workings of birds．掩盖鸟类的内部运作。
解析：定位第一句，hide与obscure相对应，inner workings跟internal activity对应，正确。
C．It contributes to the structural soundness of birds．贡献于鸟类结构的完整性。
解析：定位第一句，structural soundness与structural integrity对应，正确。
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