【单选题】关于毛囊蠕形螨形态结构特征的正确描述是(B)
【单选题】在人体寄生的两种蠕形螨,其形态特征有所区别,即( )
【单选题】Dogs have a very_____sense of smell.
【单选题】Dogs have a very _________sense of smell.
【单选题】Dogs have a very good ______ of smell and are often used to search for survivors in an earthquake.