In the past decade, new scientific developments in communications have changed the way many people gather information about poli

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问题 In the past decade, new scientific developments in communications have changed the way many people gather information about politics. The most important of these new【C1】______is the Internet. Recent research suggests the use of the Internet for political information increases the  【C2】______of participation.
   While a(n) 【C3】______relationship between Internet news and political participation has been found, a theoretical link as to why the Internet is【C4】______from other media forms is largely【C5】______This research is an attempt to【C6】______the "black-box" linking the Internet and political participation by building on two theoretical【C7】______The first, surge and decline theory, comes out of political science and the second, media systems dependency theory, 【C8】______from communications. Both explanations focus on individual costs and benefits of political participation. The media can【C9】______the "costs" by providing sufficient information to make  【C10】______decisions about voting. Previous research【C11】______that the Internet benefits the public through the cost side of the equation. One of the media’s greatest【C12】______is information and the public【C13】______on media to provide them with the information they need. 【C14】______the Internet is capable of providing information【C15】______, and from a multitude of sources, one would expect it to【C16】______. political action through lowering the cost of information.
   Besides lowering participation costs, the media can【C17】______increase the benefits of participation. Intense media【C18】______of an event such as an election can【C19】______excitement that increases the perceived "benefit" of participating. The Internet may encourage a unique participation benefit【C20】______increased mobilization efforts.
【C20】

选项 A、for
B、via
C、at
D、from

答案B

解析 for为了,因为;via通过;at在;from来自。四个选项都是介词,但用法不尽相同。for表示“为了…目的”,via表示“通过什么方式”,at表示“方式、状态、连续的行动”,from表示“由…而来”。根据句意“网络可能会经由增加动员努力来鼓励产生效益独特的政治参与”可知只有via符合要求,故选B。
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