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The primary focus of the passage is on which of the following? [br] According to
The primary focus of the passage is on which of the following? [br] According to
游客
2024-01-13
18
管理
问题
The primary focus of the passage is on which of the following? [br] According to the passage, which of the following is an accurate statement concerning meteor streams?
选项
A、Meteor streams and comets start out with smiliar orbits, but only those of meteor streams are perturbed by planetary gravittion.
B、Meteor streams grow as dust particles are attracted by the gravitational fields of comets.
C、Meteor streams are composed of dust particles derived from comets.
D、Comets may be composed of several kinds of materials, while meteor streams consitst only of large dust particles.
E、Once formed, meteor streams hasten the further disintegration of comets.
答案
C
解析
This question asks you to identify an accurate statement about meteor streams. Choice C, the best answer, restates information about the composition of meteor streams from the first sentence of the passage. Choice A is not correct. The passage discusses the influence of planetary gravitation on meteor streams but says nothing about its influence on the orbits of comets. According to the passage, it is planetary gravitation, not the gravitational fields of comets, that causes meteor streams to increase in size, so choice B is not correct. And choice D and E are not correct answers because the passage says nothing about the composition of comets or the role that meteor streams play in their further disintegration.
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