单项选择题
Which of the following does the passage imply about the notion that the universe may be based on a spherical geometry（）
A．Of the three models of spatial curvature proposed by Einstein, only spherical geometry contradicts the Euclidean model.
B．The primary evidence for the notion is that that observers cannot see spatial flexure directly, but perceive it as gravitational attraction.
C．Space mapped on the spherical geometrical model may curve in one of three ways, as Einstein proposed.
D．Spheres typically contain only three dimensions, whereas most models of the universe attribute it at least four.
E．Scientists are skeptical, given that mass and energy quantities seem insufficient, yet ultimately do not know enough to dismiss the notion.
相关考题
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单项选择题
Which of the following best describes the relationship of the second paragraph to the first（）
A．The second paragraph limits the applicability of the theoretical method described in the first paragraph.
B．The second paragraph provides further elaboration on why an assertion made at the end of the first paragraph proves true in most cases.
C．The second paragraph provides additional information in support of a hypothesis stated in the first paragraph.
D．The second paragraph provides an example of a case in which the assumption described in the first paragraph is warranted.
E．The second paragraph describes a phenomenon that has the same cause as the phenomenon described in the first paragraph. -
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 -
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
