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Many theorists now doubt that heat loss from Earth’s core and radioactive decay are sufficient by themselves to produce all the
Many theorists now doubt that heat loss from Earth’s core and radioactive decay are sufficient by themselves to produce all the
admin
2018-07-04
43
问题
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 shaped Earth’s surface. This leaves a loose end in current geological 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 modern 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 author of the passage mentions the “continuum” in order to
选项
A、point out a relationship between plate tectonics and the nineteenth-century geology
B、explain how a theory of Newton’s could influence geology and plate tectonic theory.
C、distinguish between two sources of energy that contributed to the development of Earth’s surface.
D、point out a similarity between the surface of impactors and the surface of Earth.
E、identify a feature of Shaw’s view that deviate from current scientific theories.
答案
E
解析
根据文章,当前的科学理论认为E
板块
=E
内
,而Shaw的观点与之背离,背离之处在于Shaw认为地球内部和外部是一个整体,即continuum,因此E正确。
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本试题收录于:
GRE VERBAL题库GRE分类
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GRE VERBAL
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