The passage is primarily concerned with discussing______ [br] According to the p

游客2024-01-13  16

问题 The passage is primarily concerned with discussing______ [br] According to the passage, one way in which Larson’s theory and the conventional theory of the formation of the Milky Way galaxy differs is in their assessment of the______

选项 A、amount of time it took to form the galaxy
B、size of the galaxy immediately after its formation
C、particular gas involved in the formation of the galaxy
D、importnce of the age of globular clusters in determining how the galaxy was formed
E、shape of the halo that formed around the galaxy

答案 A

解析 The best answer is A. Lines 12-15 indicate that, according to the conventional theory, the galaxy “formed over a relatively short time (about 200 million years).” Lines 29-32 state that, according to Larson’s theory, the halo of the galaxy “formed over a period of a billion or more years.” Choice D is incorrect because it can be inferred from the passage that these theories are both based on the assumption that the age of globular clusters is important in determining how the galaxy was formed. Since the passage does not indicate any position taken by the conventional theory on the original shape of the halo, E can be eliminated. The passage does not provide any information about the factors mentioned in B and C.
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