单项选择题

The reductions on greenhouse gas emissions, called for in the Kyoto Treaty, turned out to be ______.

A．too dangerous for the U.S. economy
B．unrealistic for the year 2000
C．good for oil, coal and chemical companies
D．not too difficult to achieve in the U.S.
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单项选择题
One of the great changes brought about by the knowledge society is that ______.
A．the difference between the employee and the employer bas become insignificant
B．people's traditional concepts about work no longer hold true
C．most people have to take part-time jobs
D．people have to change their jobs from time to time
单项选择题
By referring to computers and other inventions, the author means to say that
A．people should be able to respond quickly to the advancement of technology
B．future achievements in technology will bring about inconceivable dramatic changes
C．the importance of high technology has been overlooked
D．computer service will play a leading role in the future information services
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