2. 外语
  3. The author is primarily concerned with______ According to the passage, methods of exploring for gold that are widely used today

The author is primarily concerned with______ According to the passage, methods of exploring for gold that are widely used today

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问题 The author is primarily concerned with______
According to the passage, methods of exploring for gold that are widely used today are based on which of the following facts?
选项 A、Most of the Earth’s remaining gold deposits are still molten.
B、Most of the Earth’s remaining gold deposits are exposed at the surface.
C、Most of the Earth’s remaining gold deposits are buried and have no surface expression.
D、Only one type of gold deposit warrants exploration, since the other types of gold deposits are found in regions difficult to reach.
E、Only one type of gold deposit warrants exploration, since the other types of gold deposits are unlikely to yield concentrated quantities of gold.
答案C
解析 The best answer is C. According to the passage, “most deposits not yet discovered have gone undetected because they are buried and have no surface expression” (lines 14-16), and “The challenge in exploration is therefore to unravel the subsurface geology of an area and pinpoint the position of buried minerals” (lines 17-19). The “Methods widely used today” (line 19) are based on these facts, which directly contradict choice B. Choices A, D, and E are incorrect because there is no information in the passage to support these statements about methods of exploring for gold.
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