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（）的设立为元代书法的发展起到了积极的推动作用。..
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Sounds are said to be in contrastive distribution if they appear in the same environm..
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Words and phrases like now, yesterday, next week, in three day, etc. are called disco..
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Afunctional variety is a variety of a language spoken by people living in an area.（)..
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In telegraphic stage, children use single words to represent various meanings.（)..
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肺炎喘嗽的临床主症不包括A、胸痛B、咳嗽C、发热D、气急E、鼻扇..
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