She is the author of 6（）(what?) in this field._精华吧

She is the author of 6（）(what?) in this field.

精华吧→答案→慕课→未分类

She is the author of 6（）(what?) in this field.

正确答案：a number of books

Tag：大学英语时间：2022-01-11 14:17:17

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