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题目材料:

The fact that "many of H. erectus` tools were made of basalt or quartz" is relevant to the argument of the passage for which of the following reasons?
  • ANo tools made from these stones have been found in sites associated with H. sapiens.
  • BThese stones must have been deliberately collected for tool use.
  • CThese stones rarely appear in sites dating later than 40,000 years ago.
  • DThe tools formed from these stones could not have been formed without the use of intense heat.
  • EThese stones develop certain characteristics in response to high temperatures.

E显示答案

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