29.We learn from the last two pamgraphs that business-meihod Pateats

　　[A] are immune to legal challenges

　　[B] are of ten unnecessarily issued

　　[C] lower the esteem for pateat holders

　　[D] increase the incidence of risks

　　30.Which of the following would bethe subject ofthe text?

　　[A]A looming threat to bvamess-melhcd patents

　　[B]Protection for business-method patent holders

　　[C]A legal case regarding business-methodpatents

　　[D] A prevailing tread against business-method patents

　　Text 3

　　In his book The Tipping Poinl Malcohn aladuell aloues that social epidemics are dliven in largepart by the acting of a tiny minority of special

　　individuals,often calledin flu entials who are unusuall informed, persuasive, or we connect The idea is intuit ively compelling but it doesn't explain howideas actually spread。

　　The supposed importance of inftuentials derives from a plansible sounding but largely untested theory untested thelry called the "tow-step flow of communication" Information

　　llows from the mediato the inftuentials and from then to ereryone else. Marke ters have embraced the two-step flow became it suggests that if they can just find and

　　influence the in fluent ials, those select people will do most of the work for them Thetheory also seems to explain the sudden and unexpected popularity of people was

　　wearing promoting or developing whaterver it is before anyone else paid attention Anecdotal evidence of this kind fits nicely with the idea that only certain special

　　people call drivetrends

　　In their recent work howeyer some researchers have come up with the finding that in fluentials have far less impact on social epidemics than is genetally supposed In

　　fact they don’t seem to be required of all

　　The researchers' argument stems from a simple obserrating about social influence with the exception of a few celebrities like Oprah Winfrey-whose outsize presence is primanrilly a function of media not interpersonal influence-enen the most influential members of a population simply don't interact with that many others Yet it is precisely these non-celebring influentials who according to the two-step-flow theoryare supposed to drive social enidemics by influcenciny their friends and colleagues directly .For a social epidemic to occur however each person so sffected must then influcence his or her own acquaintances,who must in turn influence theirs and so on and just how many others pay attention to each of these people has little to do with the initial influential.If people in the network just two degrees removed from the initial influential prove resistant for example from the initial influential prove resistant, for example the casecade of change won't propagate very far or affect many people。

　　Building on the basic truth about interpersonal influence the researchers studied the dynamics of populations manipulating a number of variables relating of populations manipulating a number of variables relating to people’s abilify to influence others and their tendence to be

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