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  3. Scientific research has revealed that throughout the animal world, communication is just as important as it is to human beings.

Scientific research has revealed that throughout the animal world, communication is just as important as it is to human beings.

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问题     Scientific research has revealed that throughout the animal world, communication is just as important as it is to human beings. Countless animals lack the【C1】______for human speech, yet they employ  entirely different methods in order to communicate【C2】______each other. Some of the most dramatic examples of this are provided by birds. There are roughly 10 000【C3】______of birds in the world, each of which has its own miraculous features.【C4】______you may live, you can see a great number of these feathered creatures and can【C5】______different and extraordinary properties. In addition to their flawless flight mechanisms, expertise【C6】______the routes and timing of migrations, and ability to build nests, their methods to communicate  is【C7】______wonder. At critical times in birds’ lives, their【C8】______of hearing becomes particularly important. Experiments have shown that in order for birds to learn the【C9】______song of their own species,  they need an auditory feedback system.【C10】______this system, young birds learn to【C11】______the sounds they produce with the song they have memorized. If they were【C12】______, it wouldn’t normally be【C13】______for them to recognize songs. Birds’ extremely sensitive hearing functions perfectly. Clearly, if this sense failed to【C14】______properly, the bird would not be able to hear any sounds【C15】______Moreover, birds also produce【C16】______communications by their facial expressions, beak movements, feather ruffling, and【C17】______their wings. Although each species has its own body language, many different species【C18】______movements in the same way. Via facial expression, birds can【C19】______a variety of messages to those around them--negative feelings such as dislike and resentment, as well as【C20】______ones like pleasure, enthusiasm  and curiosity.
【C1】
选项 A、simplicity
B、curiosity
C、capacity
D、ability
答案D
解析 名词辨义题。文章的开头提到“科学研究表明交流对于整个动物界的重要性和人类一样”，这句进一步指出“无数的动物缺乏人类言语……”，纵观四个选项应该是言语“能力”才能说通，ability的意思是“能力，才能”，所以应该选D。simplicity“简明，表达清楚”；curiosity“求知欲”；capacity“容量，能量”。
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大学英语四级

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