2. 外语
  3. The author is primarily concerned with______ The theory mentioned in line 1 relates to the conceptual models discussed in the p

The author is primarily concerned with______ The theory mentioned in line 1 relates to the conceptual models discussed in the p

admin2009-04-18  102
问题 The author is primarily concerned with______
The theory mentioned in line 1 relates to the conceptual models discussed in the passage in which of the following ways?
选项 A、It may furnish a valid account of ore-forming processes, and, hence, can support conceptual models that have great practical significance.
B、It suggests that certain geological formations, long believed to be mineralized, are in fact mineralized, thus confirming current conceptual models.
C、It suggests that there may not be enough similarity across Archean-age gold-quartz vein systems to warrant the formulation of conceptual models.
D、It corrects existing theories about the chemical halos of gold deposits, and thus provides a basis for correcting current conceptual models.
E、It suggests that simple prospecting methods still have a higher success rate in the discovery of gold deposits than do more modern methods.
答案A
解析 The best answer is A. The passage says that the theory has “considerable practical importance” (lines 8-9), and the bulk of the passage is devoted to explaining that importance for the discovery of new gold deposits: since most remaining gold deposits are buried and have no surface expression, the passage says, conceptual models derived from theories of or-forming processes are used to identify sites where mineralization is likely to have taken place. The theory is not said to confirm or correct current models (choices B and D), nor does it suggest that simple prospecting methods have any current value (choice E). And choice C is incorrect because it contradicts what the passage suggests about the importance of the theory for the formulation of conceptual models.
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