The passage is mainly about().

科目名称：理工英语3

试卷号：11377

题型：阅读理解(单选题)

题目：The passage is mainly about().

选项：A. a better way to download an E-book B. a new kind of book-the E-books C. the new version of E-books

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答案：B. a new kind of book-the E-books