the average of和 a average of 有区别吗
题目
the average of和 a average of 有区别吗
答案
the average of 是指具体的某事物的平均数,an average of是泛指某个平均数,不是特指的例如,the average of our wage is not very highwe have many books and we have an average of 35 books per person...
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我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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