[单选题] Apart from the biological predisposition for language acquisition, language ________ is required for successful language acquisition. 【 】

1、[判断题]Langue is relatively stable, it does not change frequently; while parole varies from person to person, and from situation to situation.

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2、[判断题]The syntactic category of the specifier differs depending on the category of the head. If the heads are Ns, the specifiers are determiners. If the heads are Vs, the specifiers are qualifiers and if the head are As or Ps, then the specifiers are degree words.

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3、[判断题]It has been found that the absence of the suffix of third-person present-tense singular form of verbs and the non-standard use of double negation like I can’t eat nothing are not correlated with the social status of the speaker.

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4、[名词解释]duality

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5、[主观题]What are the major functions of language? Think of your own examples for illustration.

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