单项选择题

A．IParadigms have a system of charges that varies from ……

Which of the following is NOT true according to the passage

A．IParadigms have a system of charges that varies from users to users.
B．There are a variety of plagiarism-detection tools available today.
C．We can depend on the detection tools for actual plagiarism.
D．Plagiarism-detection service is relatively cheap.

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单项选择题According to the passage, plagiarism remains a growing problem largely because ______.

A．the plagiarism-detection tools are not powerful enough
B．the violators are smarter than the service providers
C．the violators believe they can run away with their behavior
D．the educators and businesses are too tolerant

单项选择题By white-collar copycats (Para. 1), the author refers to ______.

A．students
B．educators
C．business employers
D．business employees