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Langue and parole is the fundamental distinction discussed by Chomsky in his Aspects

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The writing system of a language is always a later invention used to record speech,thus there are still many languages in today's have no .... ()

描述细胞大小的常用单位是

A. μm
B. μg
C. cm
D. inch
E. dm

Modern linguistics is mainly diachronic.()

观察细胞的超微结构一般运用

A. 离心技术
B. 电泳技术
C. 电子显微镜术
D. 光学显微镜术
E. 原位分子杂交技术

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