单项选择题
The "ancient notion" (line 14) to which the author refers to is the idea that（）
A．infinite space, by definition, can exist but cannot be observed from an external reference point
B．in order for there to be an outside to the universe, the ultimate physical reality must be a Euclidean planar space
C．one cannot observe the edge of any object, including the universe, except by using a perspective external to it
D．the universe can always be redefined to include what is beyond an absolute reference point
E．the universe is a hypersphere which must be embedded in higher-dimensional space than that given by Euclidean geometry
相关考题
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单项选择题
The author would regard the idea that the universe inhabits a spherical geometry as（）
A．unimportant
B．unscientific
C．self-evident
D．plausible
E．unlikely -
单项选择题
Which of the following might serve as the most appropriate title for the passage（）
A．Small Groups and Governments, A Comparison of Two Economic Methods
B．Social Obligation and the Consumer: A Case Study
C．Regular vs. Irregular Systems in Economics
D．The Comparative Strength of Economics in Various Areas
E．The Triumph of Analysis in Economic Theory -
单项选择题
According to the passage, an important limitation of relativity theory is that（）
A．it fails to describe space on a non-local level, complicating attempts to determine the geometrical model of the universe
B．it cannot account for the possibility that the universe may be multiply- connected instead of singly-connected
C．it yields inconsistencies in spatial topology equations, discriminating unnecessarily between the torus and the plane
D．it creates the illusion that observable space is curved, when in fact the universe may be Euclidean and planar
E．it does not provides sufficient variety in geometrical models to describe all the possible ways in which space may curve
