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单项选择题

Visitors on a tourist visa can undertake English study for up to ______.

A．three months
B．six months
C．one year
D．three years

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单项选择题Why does the author introduce Abstract Expressionist painter

A．He wants to provide an example of artists who, like serious contemporary photographers, disavowed traditionally accepted aims of modem art.
B．He wants to set forth an analogy between the Abstract Expressionist painters and classical Modernist painters.
C．He wants to provide a contrast to Pop artist and others.
D．He wants to provide an explanation of why serious photography, like other contemporary visual forms, is not and should not pretend to be an art.

单项选择题According to the passage, new technologies are likely to influence ______.

A．the extent of competition
B．people’s spending power
C．attitudes to advertising
D．the way people shop

单项选择题It could be inferred from the passage that in the author’s country the European model of professional training is ______.

A．dependent upon the starting age of candidates
B．worth trying in various social sections
C．of little practical value
D．attractive to every kind of professional

单项选择题It is implied in the passage that ______.

A．many industrialists feel no concern for the improvement of pollution control
B．breathing low concentrations of urban dust does not necessarily sicken or kill people
C．no acceptable biological mechanism has been suggested to explain the toxicity of low concentration of urban dust
D．scientists have done nothing to reveal the mystery of the toxicity of low concentration of urban dust

单项选择题The arrival of the industrial age in our historical evolution meant that ______.

A．universal employment virtually guaranteed prosperity
B．economic freedom came within everyone’s grasp
C．patterns of work were fundamentally changed
D．people’s attitudes to work had to be reversed