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题目选项分析

Colorless diamonds can command high prices as gemstones. A type of less valuable diamonds can be treated to remove all color. Only sophisticated tests can distinguish such treated diamonds from naturally colorless ones. However, only 2 percent of diamonds mined are of the colored type that can be successfully treated, and many of those are of insufficient quality to make the treatment worthwhile. Surely, therefore, the vast majority of colorless diamonds sold by jewelers are naturally colorless.

A serious flaw in the reasoning of the argument is that

【选项】comparisons between the price diamonds command as gemstones and their value for other uses are omitted

选项是否正确?

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题目基本信息

  • 所属科目:逻辑CR
  • 题目来源1:OG18-语文分册-164
难度:难