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the average of和 a average of 有区别吗
人气:259 ℃ 时间:2020-05-14 20:37:01
解答
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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