填空题 1 are produced by a closure in the vocal tract, or by a narrowing which is so marked that air cannot escape without producing audible friction.
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【正确答案】 1、正确答案：Consonants    
【答案解析】解析：(考查辅音的定义)声道的某些部位受到挤压或阻碍后，使气流在口腔里转向、受阻或完全被阻挡，由此产生辅音。