单项选择题

It is suggested in Para. 2 that ______.

A．academic mobility may enhance scientific research
B．academic mobility may promote interpersonal relations
C．scientific researchers may be subject to misunderstanding
D．scientific researchers work in collaboration worldwide

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单项选择题

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.

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