题目内容

Client-based e-mail accounts require a special program called an e-mail client to be installed on your computer.

A. 对
B. 错

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Attachments to e-mail messages can be a document or an image.

A. 对
B. 错

The CAN-SPAM Act has proven to be more effective than spam blockers at preventing unwanted e-mail.

A. 对
B. 错

Instant messaging allows text only.

A. 对
B. 错

Cloud computing is an example of a social networking site.

A. 对
B. 错