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This passage is adapted from an article published in 1996.Many theorists now doubt that heat loss from Earth's core and radioactive decay are sufficient by themselves to produce all the energy driving the tectonic plates whose movements have helped shape Earth's surface. This leaves a loose end in current geophysical theory, Herbert Shaw argues that because scientists have underestimated the input of substantial amounts of energy from extraterrestrial impactors (asteroids and comets striking Earth) ,they have difficulty accounting for the difference between the quantity of energy produced from sources intrinsic to Earth and that involved in plate tectonics. Whereas most geologists have treated the addition of energy through the bombardment of Earth's surface by such impactors as a process separate and independent from the movement of Earth's tectonic plates, Shaw asserts that these processes are indivisible. Shaw's revolutionary"open-system"view recognizes a continuum between terrestrial and extraterrestrial dynamics,whereas modem plate tectonic theory,like the classical geology developed during the nineteenth century,is founded on the view that Earth's geological features have changed through gradual,regular processes intrinsic to Earth,without reference to unique catastrophic events. Classical geology borrowed a decisive,if unspoken,premise from Newton-the independence of Earth's processes from any astronomical context.

The primary purpose of the passage s to

identify the influences informing a particular view of the processes that have shaped Earth's surface identify differences between two views of the extraterrestrial impactors and argue that the phenomenon has influenced the development of plate tectonic theory argue that an explanation is based on a dubious premise and propose an alternative explanation. discuss an explanation and place that explanation within a larger theoretical context . suggest that an apparent discrepancy poses a less serious problem for a particular theory than many have alleged .

正确答案： D 耗时：

该题平均耗时：3分21秒，平均正确率：28 %，难度系数：3 。该题由网友提供。更多GRE题目请点击上传

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200551juzb

Chatgpt: Option D: "discuss an explanation and place that explanation within a larger theoretical context." This option accurately describes what the passage does: it explains Shaw's "open-system" view and then situates it within the broader context of geological theories, contrasting it with traditional views. The passage focuses on the relationship between Shaw's view and existing theories, highlighting the differences and implications. Option B: "identify differences between two views of the extraterrestrial impactors and argue that the phenomenon has influenced the development of plate tectonic theory." This option is incorrect because the passage does not specifically focus on the differences between two views of extraterrestrial impactors. While the passage does mention different perspectives on the role of extraterrestrial impactors, it does not argue that these impactors have influenced the development of plate tectonic theory. Instead, the passage is more concerned with explaining Shaw's theory and situating it within the context of existing geological theories, rather than focusing on how extraterrestrial impactors have shaped plate tectonic theory.

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2024-08-11 23:37:15

200551juzb

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2024-08-11 23:37:14

200551juzb

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2024-08-11 23:37:11

蒲烧芋泥斌酱

B怎么不对

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2024-03-19 16:56:15

861037rlis 回复 861037rlis
我也感觉...

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2024-08-01 15:22:14

SkylarW

我也觉得C合理

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2023-11-08 16:45:32

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