标题: 新GRE阅读理解36套每日讨论--52（群178674184） [打印本页] 作者: 普渡哥 时间: 2011-10-29 07:46 标题: 新GRE阅读理解36套每日讨论--52（群178674184） Scientists have sought evidence of long-term solar periodicities by examining indirect climatological data, such as fossil records of the thickness of ancient tree rings. These studies, however, failed to link unequivocally terrestrial climate and the solar activity cycle, or even to confirm the cycle's past existence. (45 words)
13. It can be inferred from the passage that studies attempting to use tree-ring thickness to locate possible links between solar periodicity and terrestrial climate are based on which of the following assumptions? (A) The solar-activity cycle existed in its present form during the time period in which the tree rings grew. (B) The biological mechanisms causing tree growth are unaffected by short-term weather pat terns. (C) Average tree-ring thickness varies from species to species. (D) Tree-ring thicknesses reflect changes in terrestrial climate. (E) Both terrestrial climate and the solar-activity cycle randomly affect tree-ring thickness.作者: let3699 时间: 2011-10-29 16:12
答案：E作者: bontravail 时间: 2011-10-30 00:58
A ?作者: sxldos 时间: 2011-10-30 09:29
D?作者: neo123leo 时间: 2011-10-30 09:31
应该是A作者: snowmelt 时间: 2011-10-30 10:27
A 原文：however，没有明确表示两者有直接联系作者: 普渡哥 时间: 2011-10-30 10:43
正确答案是D