Which of the following best summarizes the main idea of the passage?A．The Internet is posing a threat to publishers.B．A new mode of publication is emerging.C．Authors welcome the new channel for publication.D．Publication is rendered easier by online service.
Which of the following best summarizes the main idea of the passage?
A．The Internet is posing a threat to publishers.
B．A new mode of publication is emerging.
C．Authors welcome the new channel for publication.
D．Publication is rendered easier by online service.
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