新GRE阅读理解36套每日讨论--52（群178674184）

普渡哥

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.

let3699

答案：E

bontravail

A ?

sxldos

D?

neo123leo

应该是A

snowmelt

A 原文：however，没有明确表示两者有直接联系

普渡哥

正确答案是D

大家加油啊！！