15 Over the last century, paleontologists have used small differences between fossil specimens to classify triceratops into sixteen species. This classification is unjustified, however, since the specimens used to distinguish eleven of the species come from animals that lived in the same area at the same time. Which of the following, if true, would enable the conclusion of the argument to be properly drawn? (A) Not every species that lived in a given area is preserved as a fossil. (B) At least one individual of every true species of triceratops has been discovered as a fossil specimen. (C) No geographical area ever supports more than three similar species at the same time. (D) In many species, individuals display quite marked variation. (E) Differences between fossil specimens of triceratops that came from the same area are no less distinctive than differences between specimens that came from different areas.
C,这题怎么解释 ？
13 Many state legislatures are considering proposals to the effect that certain policies should be determined not by the legislature itself but by public referenda in which every voter can take part. Critics of the proposals argue that the outcomes of public referenda would be biased, since wealthy special-interest groups are able to influence voters’ views by means of television advertisements. Which of the following, if true, most strengthens the critics’ argument? (A) Many state legislators regard public referenda as a way of avoiding voting on issues on which their constituents are divided. (B) During elections for members of the legislature, the number of people who vote is unaffected by whether the candidates run television advertisements or not. (C) Proponents of policies that are opposed by wealthy special-interest groups are often unable to afford advertising time on local television stations. (D) Different special-interest groups often take opposing positions on questions of which policies the state should adopt. (E) Television stations are reluctant to become associated with any one political opinion, for fear of losing viewers who do not share that opinio。
For the first one, if there are only 3 species in the same area, of course the classification of 16 species is unjustified. The rest of options are all out of scope.
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发表于 2004-2-5 18:16:00
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