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.
【C7】

选项 A、experiments
B、comments
C、approaches
D、investigations

答案C

解析 experiments实验;comments评论;approaches方法,途径;investigations调查,研究。根据下文“第一种产生于政治科学的此消彼长理论,第二种来源于通信交流的媒体系统依赖理论”可推断出,此处表示的意思是“建立在两种理论方法之上”,故选C。
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