明天就考了，求助GWD-26-31

woogle

31. GWD26-Q31
Which of the following most logically completes the argument??
When people engage in activities that help others ,their brain releases endorphins,
the brain’s natural opiates, which induce in people a feeling of well-being. It has
been suggested that regular release of endorphins increases people’s longevity.
And a statistic on adults who regularly engage in volunteer work helping others
shows that they live longer, on average, than adults who do not volunteer. How-
ever, that statistic would be what we would expect even if volunteering does not
boost longevity, because          .
A. in the communities studied, women were much more likely to do regular
volunteer work than men were, and women tend to live longer than men do.
B. the number of young adults who do regular volunteer work is on the increase
C. the feelings of well-being induced by endorphins can, at least for a time, mask
the symptoms of various conditions and diseases, provided the symptoms are
mild.
D. it is rare for a person to keep up a regular schedule of volunteer work through-
out his or her life.
E. Some people find that keeping a commitment to do regular volunteer work
becomes a source of stress in their lives.

答案是A，偶选的是C

A怎么想也不太明白，请NN帮小弟一把吧

bow先了！

 

ypngzhang

就是选C，你是对的

祝你好运！

fairy533

我也明天考,LZ明天哪里考阿,呵呵

题目说,数据统计表明,做志愿者会长寿

 However, that statistic would be what we would expect even if volunteering does not
boost longevity, because_____

然而 那些统计数据也会像我们预期的那样 (即做志愿者的人长寿了) 即使志愿者工作并没有让人延长寿命 然后问你为什么

A说 A. in the communities studied, women were much more likely to do regular
volunteer work than men were, and women tend to live longer than men do

因为女人比男人更经常得做志愿者工作 而实际上 女人本来就比男人活得长.

woogle

哦，看来真的是A啊，

呵呵，我在北京考，好运！a-za-a-za,fighting!

 

wandawang

我也是明天在北京白石桥考.下午

急坏了.请告诉我T9-20-23是哪篇阅读啊??我用的是GWD31.谢谢!祝大家顺利!

woogle

T-9-Q20-Q23：GWD-13-34~37

      A small number of the forest
 species of lepidoptera (moths and
 butterflies, which exist as caterpillars
Line during most of their life cycle) exhibit
  (5) regularly recurring patterns of popu-
lation growth and decline—such
fluctuations in population are known
as population cycles.  Although many
different variables influence popula-
 (10) tion levels, a regular pattern such as
a population cycle seems to imply a
dominant, driving force.  Identification
of that driving force, however, has
proved surprisingly elusive despite
 (15) considerable research.  The com-
mon approach of studying causes of
population cycles by measuring the
mortality caused by different agents,
such as predatory birds or parasites,
 (20) has been unproductive in the case of
 lepidoptera.  Moreover, population
 ecologists’ attempts to alter cycles
by changing the caterpillars’ habitat
and by reducing caterpillar popula-
 (25) tions have not succeeded.  In short,
the evidence implies that these insect
populations, if not self-regulating, may
at least be regulated by an agent more
intimately connected with the insect than
 (30) are predatory birds or parasites.
      Recent work suggests that this
agent may be a virus.  For many
 years, viral disease had been
reported in declining populations
 (35)  of caterpillars, but population ecolo-
gists had usually considered viral
disease to have contributed to the
decline once it was underway rather
than to have initiated it.  The recent
 (40) work has been made possible by
new techniques of molecular biology
that allow viral DNA to be detected
at low concentrations in the environ-
ment.  Nuclear polyhedrosis viruses
 (45) are hypothesized to be the driving
force behind population cycles in
lepidoptera in part because the
viruses themselves follow an infec-
tious cycle in which, if protected from
 (50) direct sun light, they may remain
virulent for many years in the envi-
ronment, embedded in durable
crystals of polyhedrin protein.
Once ingested by a caterpillar,
 (55) the crystals dissolve, releasing
the virus to infect the insect’s cells.
Late in the course of the infection,
millions of new virus particles are
formed and enclosed in polyhedrin
 (60) crystals.  These crystals reenter the
environment after the insect dies and
decomposes, thus becoming avail-
able to infect other caterpillars.
      One of the attractions of this
 (65) hypothesis is its broad applicability.
Remarkably, despite significant differ-
ences in habitat and behavior, many
species of lepidoptera have population
cycles of similar length, between eight
 (70) and eleven years.  Nuclear polyhe-
drosis viral infection is one factor these
disparate species share.
--------------------------------------------------------------------------------
T-9-20:GWD-13-34:
Which of the following, if true, would most weaken the author’s conclusion in lines 25-30?
  
A. New research reveals that the number of species of birds and parasites that prey on lepidoptera has dropped significantly in recent years.
B. New experiments in which the habitats of lepidoptera are altered in previously untried ways result in the shortening of lepidoptera population cycles.
C. Recent experiments have revealed that the nuclear polyhedrosis virus is present in a number of predators and parasites of lepidoptera.
D. Differences among the habitats of lepidoptera species make it difficult to assess the effects of weather on lepidoptera population cycles.
E. Viral disease is typically observed in a large proportion of the lepidoptera population.
Answer:
--------------------------------------------------------------------------------
T-9-21:GWD-13-35:
It can be inferred from the passage that the mortality caused by agents such as predatory birds or parasites was measured in an attempt to
  
A. develop an explanation for the existence of lepidoptera population cycles
B. identify behavioral factors in lepidoptera that affect survival rates
C. identify possible methods for controlling lepidoptera population growth
D. provide evidence that lepidoptera populations are self-regulating
E. determine the life stages of lepidoptera at which mortality rates are highest
Answer:
--------------------------------------------------------------------------------
T-9-22:GWD-13-36:
The primary purpose of the passage is to
  
A. describe the development of new techniques that may help to determine the driving force behind population cycles in lepidoptera
B. present evidence that refutes a particular theory about the driving force behind population cycles in lepidoptera
C. present a hypothesis about the driving force behind population cycles in lepidoptera
D. describe the fluctuating patterns of population cycles in lepidoptera
E. question the idea that a single driving force is behind population cycles in lepidoptera
Answer:
--------------------------------------------------------------------------------
T-9-23:GWD-13-37:
According to the passage, before the discovery of new techniques for detecting viral DNA, population ecologists believed that viral diseases

A. were not widely prevalent among insect populations generally
B. affected only the caterpillar life stage of lepidoptera
C. were the driving force behind lepidoptera population cycles
D. attacked already declining caterpillar populations
E. infected birds and parasites that prey on various species of lepidoptera

BACD