单选题：E-mail is mentioned in the third paragraph to show _________

题目分类：理工类
题目类型：单选题
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题目内容：

E-mail is mentioned in the third paragraph to show __________. A．the variety of digital communications
B．the development of new technologies
C．the usefulness of digital codes
D．the relationship between communication and technology

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答案解析：

It can be inferred from the last paragraph that __________.

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分类：理工类题型：单选题

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分类：理工类题型：单选题

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