叔叔和阿姨前面是an,u和a是元音。a和an是不定冠词,用来表示一般意义,后面跟可数名词单数。a/an+单数名词一般可以指某种事物的任何代表成员。[详细]
相信很多小伙伴对学习这个话题都很感兴趣,因为最近这个话题也很热门。既然大家都想知道,我也在网上搜集了一些相关的信息,大家分享一下。[详细]
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