GRE北美真题选择题精选系列(四)B

Questions 15-18
   
    A weight-lifting contest was first held in 1971 at Cambria College and was held there once a year every succeeding year until it was discontinued after the 1977 contest. In its short history it had exactly four winners: teams P, Q, R, and S. The results were in part as follows:
    There were no ties.
    S was the only team to win in consecutive years. Neither p nor R won in the first year or the last.
    Q did not win in any even-numbered year.
   
15. If S won in 1971 and also won in 1977, which of the following must be true?
    (A) If R won in 1972, p won in 1976.
    (B) If Q won twice, S won in 1972.
    (C) If S won three times in a row, Q won in 1975.
    (D) If P and R won in consecutive year, Q won only once.
    (E) If P and R won in even-numbered years only, S won four times.
   
16. If Q won in 1971 and in 1973 only, and R won in 1972, all of the following must be true
    EXCEPT:
    (A) If P won in 1976, S won in 1974.
    (B) If R won in 1974, p won in 1975.
    (C) If R won in 1975, S won in 1976.
    (D) If S won three times in a row, p won in 1974.
    (E) If S won in 1974. S also won in 1975.
   
17. If the list of winners from 1971 to 1977 includes the sequence QPQRS, which of the following could be true?
    Ⅰ. S won in 1971 and then won again in 1973.
    Ⅱ. S won in 1971 and then won again in 1977.
    Ⅲ Q won in 1971.
    (A) Ⅰcould, but Ⅱand Ⅲ could not
    (B) Ⅱcould, but Ⅰand Ⅲcould not
    (C) Ⅰcould, and Ⅱcould, but Ⅲcould not
    (D) Ⅰcould, and Ⅲ could, but Ⅱcould not
    (E) Ⅱcould, and  Ⅲ could, but I could not
   
18. For which of the following partial lists of winners, given in the order of the years from 1971 to 1977, is there only one way of substituting winners for the blanks?
    (A) _, R, P, _, P, S, _
    (B) _, S, S, R, _, R, _
    (C) S, S, S, _, Q, _, Q
    (D) _, P, R, P, R, _, _
    (E) S, S, _, P, Q, R, _
   
Questions 19-22
   
    Each of seven objects-T, U, V, W, X, Y, and Z-is placed either on the lower, middle, or top shelf of a three-shelf bookcase that contains no other objects.
    At least two objects are on the top shelf.
    No more than four objects are on any shelf.
    T and U are on different shelves.
    V is either one shelf or two shelves above the shelf that X is on.
    W is either one shelf or two shelves above the shelf that X is on.
   
19. If V and W are the only object on one of the shelves, and four objects are on the middle shelf, which of the following must be true?
    (A) T is on the middle shelf.
    (B) U is on the bottom shelf.
    (C) X is on the bottom shelf.
    (D) Y is on the top shelf.
    (E) Z is on the middle shelf.
   
20. If al the objects are on two shelves, which of the following must be true?
    (A) At least three objects are on the top shelf.
    (B) No more than three objects are on the middle shelf.
    (C) T, V, and W are on the top shelf.
    (D) U is on the top shelf.
    (E) X is on the bottom shelf.
21. If V and T are the only objects on one of the shelves, which of the following must be true?
    (A) W is on the top shelf.
    (B) X is on the bottom shelf.
    (C) U is on either the middle or top shelf.
    (D) If U and Y are on different shelves, Z is on the top shelf.
    (E) If Y is on the bottom shelf, Z is on the middle shelf.
   
22. If T, V, Y, and Z are on the same shelf, which of the following must be true?
    (A) U is not on the middle shelf.
    (B) W is not on the middle shelf.
    (C) X is alone on a shelf.
    (D) If U is on the top shelf, W is also on the top shelf.
    (E) If X is one shelf below W, U is on the top shelf.
   
23. If a physician can be confident in his or her diagnosis of acute illness, especially when that diagnosis is supported by repeated contact with the patient during treatment, the treatment prescribed will be conservative. This is one reason that treatment for a specific illness usually costs more in hospital emergency rooms than in physicians' private offices.
   
    All of the following, if true, explain why treat- ment in an emergency room costs more than treatment in a physician's private office
    EXCEPT:
    (A) The medical equipment in hospital emergency rooms is more sophisticated and elaborated than that found in physicians' private offices.
    (B) When patients come to physicians' private offices, the state of their illness is usually such that physicians have time to try one test or medication at a time in order to monitor the results.
    (C) The variety of illnesses treated by emergency room physicians is much smaller than the variety treated by physicians in their offices.
    (D) The illness of many patients who apply for emergency room treatment is so severe that physicians apply several remedies at once in the hope of obtaining immediate results.
    (E) In emergency rooms a patient is often attended by nurses, paramedics, and physicians, whereas visits of private office rarely involve more than two staff members.
   
24. Industries can and will build new plants in a world of high environmental standards. But in a world of uncertainty, where the standards that must be met can change and construction that was once acceptable can be halted because it conflicts with newly passed regulations, new factories simply will not be built.
   
    Which of the following proposals, if accepted, would work most to reduce the threat to the construction of new factories described in the passage above?
    (A) Environmental cases involving construction should be heard and decided by the courts as quickly as possible.
    (B) Environmental regulations should be published widely as soon as they are established.
    (C) The government should pay for all recently completed factories to be brought up to new environmental standards.
    (D) Industries should conform to strict environmental standards without delay.
    (E) Environmental standards for any factory should not be altered once construction is underway.
25. In this day and age, the Constitution is a fallible and incomplete guide to national policymaking. Instead of three branches of government- legislative, executive, and judicial-each with its clearly defined sphere of competence and activity, as the Constitution prescribes, there may be five branches of government dealing with any particular subject matter, or seven, or twenty, or only one, with legislative, executive, and judicial roles mixed and distributed throughout the national government.
   
    The persuasiveness of the claim made above is most weakened by its vague use of the phrase
    (A) this day and age
    (B) fallible and incomplete
    (C) guide to national policymaking
    (D) branches of government
    (E) mixed and distributed
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