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题库 / GMATLA-2PA-7
Archaeologist: There were several porcelain-producing centers in 18th-century Britain, among them Bristol, Plymouth, and New Hall. Each center developed a unique recipe for its porcelain that might include flint glass, soapstone, bone ash, clay, quartz, and so on. We will therefore be able to determine, on the basis of compositional analysis, where the next cup we recover from this archaeological site was made.
Indicate two different statements as follows: one statement identifies an assumption required by the archaeologist's argument and the other identifies a possible fact that, if true, would, provide significant logical support for the required assumption.
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Other cups have been recovered from the archaeological site, all of which were made of porcelain.
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Some of the cups recovered from the archaeological site were not made of porcelain.
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The next cup to be recovered from the site will likely be made of porcelain.
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Porcelain makers often traveled between centers, experimenting with one another's recipes.
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There was considerable overlap of materials in recipes used by the various centers.
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Most porcelain in 18th-century Britain was made at one of the several centers.
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gmat club说答案应该为CA
考古学家说，我可以判断出下一个挖掘出的杯子是哪里生产的，而前文又说考古学家可以通过陶瓷杯子的成分判断杯子的产地，因此考古学家能“夸下海口”的前提必定是那个杯子是陶瓷的。（因为考古学家无法判断木杯子金杯子银杯子铜杯子玻璃杯子甚至塑料杯子是在哪里生产的，而只能判断陶瓷杯子是从哪里生产的）。考古学家说能判断出下一个杯子是哪里生产的，那么它的最好的前提就是下一个杯子是陶瓷的。而A选项，虽然也提到杯子是陶瓷的，但是它并没有定位到下一个杯子，也就是说即使之前开采出来的所有杯子都是陶瓷的，就在开采下一个的时候倒霉了，开采出个玻璃杯子，地质学家的结论都无法实现。所以C选项是assumption.
刚刚说到C选项是最好的前提·，可以这一前提能实现吗？这是本题的第二个问题，就是找出为C选项成立能提供支持的选项，即哪个选项成立，考古学家挖到的下一个杯子就很有可能是陶瓷的呢？A选项很好，因为A选项说其他的所有开采出来的杯子都是陶瓷的，那下一个开采出来的杯子是陶瓷的概率就很大。
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