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The author refers to the ocean bottom as a "frontier" in Paragraph 1 because it
The author refers to the ocean bottom as a "frontier" in Paragraph 1 because it
游客
2023-07-17
63
管理
问题
The author refers to the ocean bottom as a "frontier" in Paragraph 1 because it ______. [br] Deep-ocean sediments provided better information about the world’s past climate because they ______.
选项
A、are well protected
B、have land-based evidence
C、are in isolation
D、have a longer history
答案
A
解析
由题干中的Deep-ocean sediments provided better information about the world’s past climate定位到原文第四段第二句Deep-ocean sediments provide a climatic record stretching back hundreds of millions of years,because they are largely isolated from the mechanical erosion and the intense chemical and biological activity that rapidly destroy much land-based evidence of past climates.[精析] 原因目的题[考频:24]。第四段中because they are largely isolated from the mechanical erosion and the intense chemical and biological activity因为它们远离了机械侵蚀及生化活动的影响,这表明海底沉淀物很难受到侵蚀和破坏,从另一个角度也说明了它受到了很好的保护。故选A)。[避错] B)“有基于陆地的证据”,这点文中未提到,排除此项;C)“被隔离”,说得过于绝对,排除此项;D)“有更悠久的历史”,文章中未提到,排除D)。
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