[判断题] Vowels are usually distinguished according to the fllowing three factors: the position of the tongue in the mouth, the shape of the lips, and the length of the vowels. Thus, the English
vowel can be described as high, close, and long.

1、[判断题]In such sound combinations as / pɪt/, /ˈpeɪpə/ and / pleɪn/, the voiceless stop /p/, occurring in the first position, is unaspirated, i.e. pronounced with the strong puff of air withheld to some extent.

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2、[判断题]An important difference between traditional grammarians and modern linguists in their study of language is that the former tended to overemphasize the written form of language and encourage people to imitate the “best authors” for language usage.

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3、[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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4、[判断题]We can add –un to adjectives to form new adjective words. This un-Rule is not as productive for adjectives composed of just one morpheme as for those that are themselves derived for verbs, such as unacceptable and undecided.

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5、[名词解释]assimilation rule

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