新GRE阅读理解36套每日讨论--44（群178674184）

普渡哥 · 发表于 2011-10-20 04:26:36

Currently, the paramount problem in the field of
biomaterials, the science of replacing diseased tissue
with human-made implants, is control over the interface, or
surface, between implanted biomaterials and living
5 tissues. The physical properties of most tissues can be
matched by careful selection of raw materials: metals,
ceramics, or several varieties of polymer materials. Even
the requirement that biomaterials processed from
these materials be nontoxic to host tissue can be met by
10 techniques derived from studying the reactions of tissue
cultures to biomaterials or from short-term implants.
But achieving necessary matches in physical properties
across interfaces between living and non-living matter
requires knowledge of which molecules control the bonding of
15 cells to each other—an area that we have not yet explored
thoroughly. Although recent research has allowed us to
stabilize the tissue-biomaterial interface by controlling
either the chemical reactions or the microstructure of
the biomaterials, our fundamental understanding of how
20 implant devices adhere to tissues remains woefully incomplete.

(159 words)

1. According to the passage, the major problem
currently facing scientists in the field of bio-
materials is
(A) assessing and regulating the bonding
between host tissue and implants
(B) controlling the transfer of potentially toxic
materials across the interface of tissue
and implant
(C) discovering new materials from which to
construct implant devices
(D) deciding in what situations implants are
needed
(E) determining the importance of short-term
implants to long-term stability of tissue
implant interfaces

2. The passage suggests which of the following
about the recent research mentioned in the last
sentence ?
(A) It has solved one set of problems but has
created another.
(B) It has concentrated on secondary concerns
but has ignored primary concerns.
(C) It has improved practical applications of
biomaterial technology without providing a
complete theoretical explanation of that
improvement.
(D) It has thoroughly investigated properties of
biomaterials but has paid little attention
to relevant characteristics of human tissue.
(E) It has provided considerable information on
short-term implant technology but little
on long-term implant technology.

bontravail · 发表于 2011-10-20 07:13:00

lukehao88 · 发表于 2011-10-20 10:34:51

A C
恩，还是要提高速度啊

ZMFuibe · 发表于 2011-10-20 15:46:52

普渡哥 · 发表于 2011-10-21 08:59:21

全对了。厉害啊

candyllllll · 发表于 2011-10-26 17:47:28

文章类型属于现象解释型，对吗？

新GRE阅读理解36套每日讨论--44（群178674184）

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