题目内容

The name of Web scutters is known to every net potato.

A. 对
B. 错

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The work of Web crawling or spidering is the essential part of a search engine.

A. 对
B. 错

Web crawlers copy all the visited pages for the search engine to index.

A. 对
B. 错

Crawlers can prevent some engines from harvesting email addresses.

A. 对
B. 错

The seed URLs are the crawl frontier.

A. 对
B. 错