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Previously, the sack-like rabbit appendix was thought to serve primarily as a reservoir for the bacteria involved in hind
Previously, the sack-like rabbit appendix was thought to serve primarily as a reservoir for the bacteria involved in hind
admin
2011-01-17
25
问题
Previously, the sack-like rabbit appendix was thought to serve primarily as
a reservoir for the bacteria involved in hindgut fermentation, an explanation
that failed to account for the absence of an appendix in other animals with
Line similar digestive systems or for its presence in humans. Microscopic research
(5) revealed that the appendix contains a significant amount of lymphoid tissue,
similar aggregates of which tissue occur in other areas of the gastrointestinal
tract. These are involved, possibly, in the body’s ability to recognize foreign
antigens in ingested material, but the evidence is inconclusive, to the extent
that scientists have long discounted the human appendix as a "vestigial" organ.
(10) However, a growing body of evidence suggests that the appendix, far from
being a "vestigial organ", has a significant function as a part of the body’ s
immune system. The appendix achieves its greatest development shortly after
birth, when immune response is first developing, then regresses with age,
when the immune response mediated by the appendix may relate to such
(15) inflammatory conditions as ulcerative colitis, which in adults necessitates the
organ’s surgical removal.
Which of the following best describes the relationship of the second paragraph to the first?
选项
A、The second paragraph relies on different evidence in drawing a conclusion similar to that expressed in the first paragraph.
B、The second paragraph provides further elaboration on why an assertion made at the end of the first paragraph proves true in most cases.
C、The second paragraph provides additional information in support of a hypothesis stated in the first paragraph.
D、The second paragraph provides an example of a case in which the assumption described in the first paragraph is unwarranted.
E、The second paragraph describes a phenomenon that has the same cause as the phenomenon described in the first paragraph.
答案
C
解析
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本试题收录于:
GRE VERBAL题库GRE分类
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