15.Under ethical guidelines recently adopted by the NationalInstitutes of Health, human genes are to be manipulated only to correctdiseases for which ____ treatments are unsatisfactory.
similar
most
dangerous
uncommon
alternative
16.The significance of the Magna Carta lies not in its ____ provisions, but in its broader impact: it made the king subject to the law.
specific
revolutionary
implicit
controversial
finite
17.Because many of the minerals found on the ocean floor are still ____ on land, where mining is relatively inexpensive, mining the ocean floor has yet to become a ____ enterprise.
scarce. . common
accessible.. marginal
unidentified.. subsidized
conserved . . public
plentiful.. profitable
18.Although the passage of years has softened the initially hostile reaction to his poetry, even now only a few independent observers ____ his works.
praise
revile
scrutinize
criticize
neglect
19.Once a duckling has identified a parent, the instinctive bond becomes a powerful ____ for additional learning since, by ____ the parent, the duckling can acquire further information that is not genetically transmitted.
【GRE网络课堂词汇填空笔记-沈辉主讲(三)】相关文章:
最新
2016-06-14
2016-06-14
2016-03-01
2016-03-01
2016-03-01
2016-03-01