The passage is primarily concerned with discussing______ Which of the following most accurately state a finding of Bolte’s rese

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问题 The passage is primarily concerned with discussing______
Which of the following most accurately state a finding of Bolte’s research, as described in the passage?

选项 A、The globular clusters in the Milky Way galaxy are 2 billion years older than predicted by the conventional theory.
B、The ages of at least some globular clusters in the Milky Way galaxy differ by at leat 4 billion years.
C、One of the globular clusters in the Milky Way galaxy is 5 billion years younger than most others.
D、The globular clusters in the Milky Way galaxy are significantly older than the individual stars in the halo.
E、Most globular clusters in the Milky Way galaxy are between 11 and 15 billion years old.

答案B

解析 The best answer is B. Bolte found that one cluster “is 2 billion years older than most other clusters in the galaxy, while another is 2 billion years younger” (lines 22-24). Thus, he found that at least these two clusters differ in age by at least 4 billion years. Choice C is incorrect, because the passage states that it was a colleague of Bolte’s who claimed that a cluster is 5 billion years younger than most. The passage does not indicate any finding by Bolte that corresponds to the statements in the other choices.
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