单项选择题

It is suggested in Par

A．2 that_________.A. academic mobility may enhance scientific researchB. academic mobility may promote interpersonal relationsC. scientific researchers may be subject to misunderstandingD. scientific researchers work in collaboration worldwide

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A．they seem to be fun to beginnersB．they allow big winsC．they are easy to playD．big wins seem possible given enough time and money

A．they seem to be fun to beginners
B．they allow big wins
C．they are easy to play
D．big wins seem possible given enough time and money

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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.