单项选择题

Grinols is primarily concerned with ______ in his new book.

A．demonstrating the prevalence of gambling
B．examining the benefits and costs of gambling
C．exploring the causes of gambling
D．showing whether the benefits of gambling outweigh its costs

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单项选择题

Which of the following statements is NOT true of a folk culture

A．Impersonal.
B．Religious.
C．Conservative.
D．Collectiv

单项选择题

It can be inferred from this passage that ______.

A．a popular culture is superior to a folk culture
B．a folk culture allows alterations
C．folk cultures will vanish soon under the influence of popular cultures
D．a folk culture is against using all kinds of modern facilities