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如今的音像市场上，正版的激光唱盘和影视盘销售不佳，而盗版的激光唱盘和影视盘却屡禁不绝，销售非常火爆。有的分析家认为，这主要是因为价格上盗版盘更有优势，所以在市场上更有活力。 以下哪项是这位分析人员在分析中隐含的假定( )
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2009年6月，渡江市国家税务局稽查局(以下简称稽查局)对丰华公司进行日常税务检查。稽查局认为，该公司在税务检查期间不如实反映情况、拒不提供有关资料，并且存在不接受税务机关处理的行为，遂向该公司送达(渡国税稽停票[2009]3号)《收缴、停止发售发票决定书》(以下简称《决定书》)，决定自2009年6月26日起停止向丰华公司出售专用发票并收缴其空白发票。该公司认为：第一，公司在税务检查期间主动配合稽查局进行检查，在力所能及范围内尽可能地给稽查局提供需要的材料，不存在不如实反映情况、拒不提供有关资料的事实。第二，公司在稽查局决定收缴、停止发售发票之前从未接到过税务机关的任何处理决定，因而不存在拒不接受税务机关处理的行为。该公司遂于2009年7月8日向渡江市国家税务局申请复议，请求撤销稽查局作出的《决定书》，并责令被申请人稽查局向该公司发售发票。复议期间，稽查局研究决定，自2009年7月21日起解除收缴、停止发售发票措施，同意该公司使用和领购发票。2009年7月22日，该公司提出撤回税务行政复议申请。 根据我国行政法理论，稽查局收缴丰华公司空白发票的行为性质上属于______。
IP作为一种互联网协议，运行在______。
OSI参考模型中，网络层的主要功能有：路由选择、______和网络互联等。
It has become a cliche among doctors who deal with AIDS that the only way to stop the epidemic is to develop a vaccine against HIV, the virus that causes it. Unfortunately, there is no sign of such a thing becoming available soon. The best hope was withdrawn from trials just over a year ago amid fears that it might actually be making things worse. As a result, vaccine researchers have mostly gone back to the drawing board of basic research. Meanwhile, the virus marches on. Last year, according to UNAIDS, the international body charged with combating it, 2.7 million people were infected, bringing the estimated total to 33 million. Reuben Granich and his colleagues at the World Health Organization (WHO), though, have been exploring an alternative approach. Instead of a vaccine, they wonder, as they write in The Lancet, whether the job might be done with drugs. In the spread of any contagious disease, each act of infection has two parties, one who already has the disease and one who does not. Vaccination works by treating the uninfected individual prophylactically (预防地). Since it is" impossible to say in advance who might be exposed, that means vaccinating everybody. The alternative, as Dr. Granich observes, is to treat the infected individual and thus stop him being infectious. For this to curb an epidemic would require an enormous public-health campaign of the sort used to promote vaccination. But that campaign would be of a different kind. It would have to identify all (or, at least, almost all) of those infected. It would then have to persuade them to undergo not a short, simple vaccination course, but rather a drug regime that would continue indefinitely. The first question to ask of such an approach is, could it work in principle It is this that Dr. Granich and his colleagues have tried to answer. Using data from several African countries, they have constructed a computer model to test the idea. In their ideal world, everyone over the age of 15 would volunteer for testing once a year. If found to be infected, they would be put immediately onto a course of what are known as first-line antiretroviral drugs (ARVs). These are reasonably cheap, often generic, pharmaceuticals (医药品) that, although they do not cure someone, do lower the level of the virus in his body to the extent that he suffers no symptoms. They also -- and this is the point of the study -- reduce the level enough to make him unlikely to pass the virus on. For the 3% or so of people per year for whom the first-line ARVs do not work, more expensive second-line treatments would be used. As is stated in the passage, the principle of the alternative approach is that ______.
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