2. 外语
  3. Many animal and even plant species communicate with each other. Humans are not unique in this capability. Therefore, human lang

Many animal and even plant species communicate with each other. Humans are not unique in this capability. Therefore, human lang

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问题     Many animal and even plant species communicate with each other.
Humans are not unique in this capability. Therefore, human language is【S1】________
unique in being a symbol communication system that is learned instead【S2】________
of biologically inherited.
    A word is one or more sounds that in combination have a special【S3】________
meaning assigned by a language. The symbolic meaning of words can be
so powerful that people are willing to risk their lives for them or take the
lives of others.
    A major advantage of human language is being a learned symbolic【S4】________
communication system is that it is infinitely flexible. Meanings can be
changed and new symbols create. This is evidenced by the fact【S5】________
which new words are invented daily and the meaning of old ones【S6】________
changes. Languages evolve in response to changed historical and social【S7】________
conditions. Some language transformations typically occur in a generation
or less. For instance, the slang words used by your parents were very
likely different from it that you use today. You also probably are familiar【S8】________
with many technical terms, such as " text messaging" and " high
definition TV", which were not in general use even a decade ago.
    Language and speech are not the same thing. Speech is a broad
term simply referred to patterned verbal behavior. In contrast, a【S9】________
language is a set of rules for generating speech. A dialect is a variant of
a language. If it is associated with a geographically isolated speech
community, it is referred to a regional dialect. However, if it is spoken【S10】________
by a speech community that is merely socially isolated, it is called a
social dialect which is mostly based on class, gender, age, and particular
social situations.
【S2】
选项
答案symbol—symbolic
解析 词性混用。symbol表示“符号”，是名词。句中被修饰的是名词短语communication system，应该使用形容词symbolic“符号的”。该句意为“然而，人类语言作为一种只能被学习而非遗传的符号化沟通系统是独一无二的。”
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