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| 文章出处：学生大考试站 发布时间：2005-10-12 |
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
unwilling 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 consecutively 1through 4 from one
end of the row to the other. The bank has exactly six
cashiers: two supervisors (Joan and Karim); and four
trainees (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 supervisor.
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 cann
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