2. 外语
  3. A language is a signaling system which operates with symbolic vocal sounds(语声), and which is used by a group of people for the p

A language is a signaling system which operates with symbolic vocal sounds(语声), and which is used by a group of people for the p

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问题     A language is a signaling system which operates with symbolic vocal sounds(语声), and which is used by a group of people for the purpose of communication.
    Let’s look at this【B1】in more detail because it is language, more than anything else,【B2】distinguishes man from the rest of the【B3】world.
    Other animals, it is true, communicate with one another by【B4】of cries: for example, many birds utter【B5】calls at the approach of danger; monkeys utter【B6】cries, such as expressions of anger, fear and pleasure.【B7】these various means of communication differ in important ways【B8】human language. For instance, animals’ cries do not【B9】thoughts and feelings clearly. This means, basically, that they lack structure. They lack the kind of structure that【B10】us to divide a human utterance into【B11】.
    We can change an utterance by.【B12】one word in it with【B13】: a good illustration of this is a soldier who can say, e.g., "tanks approaching from the north",【B14】who can change one word and say "aircraft approaching from the north" or "tanks approaching from the west"; but a bird has a single alarm cry,【B15】means "danger!"
    This is why the number of【B16】that an animal can make is very limited., the great tit(山雀) is a case【B17】point; it has about twenty different calls,【B18】in human language the number of possible utterances is【B19】. It also explains why animal cries are very【B20】in meaning.
选项 A、classification
B、definition
C、function
D、perception
答案B
解析 逻辑关系和词义辨析题。根据此前的this可知，此处是上文提到过的内容，在下文中，作者想对其做一个更具体的解释。故这里用一个词概述前文时，可以用this definition替代。定义中说到语言的两个方面，形式上是有声符号，功能上是交际工具，下文就从这两个方面说明人类语言与动物声音的区别，故这里选B。perception“感知，觉察”；function“功能，作用”；classification“分类，分级”。
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大学英语四级

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