The job of a Web crawler is to browse the World Wide Web.
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The name of Web scutters is known to every net potato.
A. 对
B. 错
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
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