GRE试题七(2)

9. In recent years, there has been a dramatic decline in
the population of the shrike, a predatory bird that
inhabits flat land, such as farms and pastures. Some
ornithologists hypothesize that this decline is due to
the introduction of new, more effective pesticides¹ to
control the insect species on which shrikes prey².

The answer to which of the following questions is
NOT relevant to evaluating the ornithologists’
hypothesis?
(A) Was there a decline in the shrike population
before the new pesticides were first used?

(B) Have shrike populations declined significantly
in those habitats where the new pesticides have
not been used?
(C) Have the new pesticides more significantly
reduced the population of insect species on
which shrikes prey than did the pesticides previously³
used?
(D) Are insects that have consumed the new pesti-
cides more toxic⁴ to the shrikes that eat those
insects than were insects that consumed the
less effective pesticides?
(E) Are the new pesticides considered by most
people to be less harmful to the environment
than the old pesticides were considered to be?

10. Census⁵ data for Prenland show that unmarried
Prenlandic men in their thirties outnumber unmarried
Prenlandic women in that age group by about ten to
One. Most of these men do wish to marry. Clearly,
however, unless many of them marry women who
are not Prenlandic, all but a minority will remain
unmarried.

The argument makes which of the following assump-
tions?
(A) Emigration from Preland is more common
among women than among men.
(B) A greater proportion of Prelandic women
in their thirties than of Prenlandic men of the
same age would prefer to remain unmarried.
(C) It is unlikely that many of these unmarried
Prenlandic men will marry women more than
a few years older than themselves.
(D) Prenland has a high rate of divorce.
(E) Most of the unmarried Prenlandic men are
unwilling⁶ to marry women who are not
Prenlandic.

11.Certain extremely harmful bacteria found only in
sewage are difficult to detect directly. Testing for
E. coli, an easily detected and less harmful type of
bacteria, in ocean water would be a reliable way of
determining whether or not these more harmful bac-
teria are present, since ocean water contains E. Coli
only if the water is contaminated with sewage that
contains the harmful bacteria.

Which of the following, if true, most seriously
weakens the argument?
(A) There are many different strains of the E. coli
bacteria, and only some of these strains are
harmful.
(B) Some types of bacteria found in sewage are
neither disease-causing nor difficult to detect
directly.
(C) Some of the types of bacteria found in sewage
along with E. coli are not harmful to people
unless the bacteria are ingested in large quantities.
(D) E. coli dies out much more quickly than some of
the more harmful bacteria found in sewage and
then can no longer be easily detected.
(E) Some of the types of bacteria found in sewage
along with E. coli reproduce at a slower rate
than E. coli.
Questions 12-17

A bank has exactly four cashier windows, arranged in a
row and numbered consecutively⁷ 1through 4 from one
end of the row to the other. The bank has exactly six
cashiers: two supervisors⁹ (Joan and Karim); and four
trainees¹⁰ (Lorraine, Mark, Nora, and patrick). Throughout
a particular peak-hour period, the stationing of cashiers at
windows is restricted as follows:

There must be exactly one cashier at each window.
The cashier at window 2 must be a supervisor⁸.
Lorraine must be at a window but cannot be at window 3.
If Mark is at one of the windows, Joan must be at a
window immediately adjacent to it.
The cashiers at the windows must include either Nora
or Patrick, but they cannot include both Nora and
Patrick.

12.Which of the following lists the cashiers who can be
stationed at windows 1 through 4 during this period?
1 2 3 4
(A) Joan Karim Mark Lorraine
(B) Joan Karim Nora Lorraine
(C) Karim Nora Joan Lorraine
(D) Mark Joan Lorraine Patrick
(E) Patrick Joan Nora Lorraine

13.Which of the following must be true about the

stationing of the cashiers during this period?
(A) Joan is at window 1 or at window 2.
(B) Karim is at window 2 or at window 4.
(C) Lorraine is at window 1 or window 4.
(D) Nora is at window 1 or at window 3.
(E) Patrick is at window 3 or at window 4.
sarily in that order, are stationed at immediately
adjacent windows, which of the following must be
stationed at window 4 during this period?
(A) Joan
(B) Karim
(C) Lorraine
(D) Mark
(E) Patrick

1 pesticides   

n.杀虫剂( pesticide的名词复数 )；除害药物

参考例句：

• vegetables grown without the use of pesticides 未用杀虫剂种植的蔬菜
• There is a lot of concern over the amount of herbicides and pesticides used in farming. 人们对农业上灭草剂和杀虫剂的用量非常担忧。 来自《简明英汉词典》

2 prey   

n.被掠食者，牺牲者，掠食；v.捕食，掠夺，折磨

参考例句：

• Stronger animals prey on weaker ones.弱肉强食。
• The lion was hunting for its prey.狮子在寻找猎物。

3 previously   

adv.以前，先前（地）

参考例句：

• The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
• Let me digress for a moment and explain what had happened previously.让我岔开一会儿，解释原先发生了什么。

4 toxic   

adj.有毒的，因中毒引起的

参考例句：

• The factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
• There is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。

5 census   

n.(官方的)人口调查，人口普查

参考例句：

• A census of population is taken every ten years.人口普查每10年进行一次。
• The census is taken one time every four years in our country.我国每四年一次人口普查。

6 unwilling   

adj.不情愿的

参考例句：

• The natives were unwilling to be bent by colonial power.土著居民不愿受殖民势力的摆布。
• His tightfisted employer was unwilling to give him a raise.他那吝啬的雇主不肯给他加薪。

7 consecutively   

adv.连续地

参考例句：

• He was actually too depleted to think consecutively about anything. 他已经打不起一点精神，根本谈不上好好思考一下。 来自辞典例句
• In any game, the right to serve shall pass consecutively. 在一局中，不错的发球挨次应该是。 来自互联网

8 supervisor   

n.监督人，管理人，检查员，督学，主管，导师

参考例句：

• Between you and me I think that new supervisor is a twit.我们私下说，我认为新来的主管人是一个傻瓜。
• He said I was too flighty to be a good supervisor.他说我太轻浮不能成为一名好的管理员。

9 supervisors   

n.监督者，管理者( supervisor的名词复数 )

参考例句：

• I think the best technical people make the best supervisors. 我认为最好的技术人员可以成为最好的管理人员。 来自辞典例句
• Even the foremen or first-level supervisors have a staffing responsibility. 甚至领班或第一线的监督人员也有任用的责任。 来自辞典例句

10 trainees   

新兵( trainee的名词复数 )； 练习生； 接受训练的人； 训练中的动物

参考例句：

• We've taken on our full complement of new trainees. 我们招收的新学员已经满额了。
• The trainees were put through an assault course. 受训人员接受了突击训练课程。