单项选择题

The main idea of the second paragraph is ______.

A．people's attitude towards Wikipedia is controversial
B．Wikipedia is spread worldwide
C．Wikipedia is a symbol of collaboration and cooperation
D．it is not quite a reliable resource
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单项选择题
Why is it difficult to combine television with Internet
A．Because the two media have different bandwidth.
B．Because the response times of Internet is long and erratic.
C．Because the two are operated on different principles of services.
D．Because the platforms are quite expensiv
单项选择题
Which of the following statements is NOT true about the digital convergence
A．It combines various media such as television and Internet together.
B．If achieved, it will be better than the well-reputed "information superhighway".
C．The technology is difficult to achieve as it seems impossible to establish platforms.
D．It is simply a technology that will play an important role in our lives.
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