GRE北美真题选择题精选系列(五)A

Questions 1-5
   
    In a study of five brands of pain reliever, P, Q, R, S, and T, the brands were tested and ranked against each other as more or less effective per dose. The following results were obtained:
    (1) P was more effective than Q.
    (2) The effectiveness of R was less than that of S.
    (3) T was the least effective brand tested.
    (4) Q and R were equally effective.
    (5) The effectiveness of S was greater than that of Q.
   
1. If the statements above giving the results of the study are true, which of the following must also be true?
    (A) P and S were equally effective.
    (B) P was the most effective brand tested.
    (C) S was the most effective brand tested.
    (D) R was less effective than P.
    (E) T did not relieve pain.
   
2. All of the information in the results given above can be derived from which of the following groups of statements?
    (A) Statements 1, 2, and 3
    (B) Statements 1, 3, and 4
    (C) Statements 2, 3, and 4
    (D) Statements 1, 2, 3, and 4
    (E) Statements 2, 3, 4, and 5
   
3. If a sixth brand, M, is tested and is found to be more effective than S, then which of the following must be true if the findings of the study are correct?
    (A) M is the most effective of the six brands tested.
    (B) At least four of the six brands tested are less effective that M.
    (C) M is more effective than P.
    (D) M is less effective than P.
    (E) No more than four of the six brands tested are more effective than T.
   
4. If R is more expensive per dose than P, and T is less expensive per does than R, which of the following must be true, according to the study, for a consumer who wishes to buy a pain reliever with the greatest effectiveness for the amount spent per dose?
    (A) P should be purchase instead of R.
    (B) P should be purchased instead of T.
    (C) T should be purchased instead of R.
    (D) Q should be purchased instead of R if Q is the same price as S.
    (E) Q should be purchased instead of T if Q is the same price as R.
   
5. If Q contains the same amount of an ingredient, X, as S does and more of that ingredient than T does, which of the following is consistent with the results of the study?
    (A) The relative effectiveness of the five brands of pain reliever is due to the amount of X the brands contain.
    (B) R does not contain X, and brands of pain reliever in which X is absent do not have any measurable effectiveness.
    (C) Brands of pain reliever containing X do not have any measurable effectiveness.
    (D) The absence of X in R would account for R's being more effective than T, Q, and S.
    (E) The presence of X contributes to the effectiveness of T, Q, and S in relieving pain.
   
6. For life to develop on another planet, two conditions, at least, are necessary: (1) moderate temperature, as the result of suitable distance from a heat source, and (2) a range of temperature that is stable over a period of at least 3.7 billion years. The unlikelihood that such conditions are often to be found in the universe makes it highly probably that exists only on Earth.
   
    The argument above assumes that
    (A) a certain temperature range is the only condition essential to the development of life on a planet
    (B) life cannot exist on planets other than Earth
    (C) forms of life on other planets would require some of the same conditions as do earthly forms of life
    (D) there is no satisfactory explanation of why life development on Earth and not on other planets
    (E) signs of extinct life forms are likely to be found of many planets with extreme temperatures
   
7. Ⅰ. When a person dies, that person's brain waves, as measured by the electroencephalograph (EEG), no longer show a positive reading but remain flat.
    Ⅱ. A positive EEG reading can be obtained from a bowl of cherry gelatin.
   
    Which of the following conclusions can most logically be drawn from the information above?
    (A) The EEG is not a reliable test to use in the measurement of human brain waves.
    (B) Some changes in a person's EEG can be viewed as a signal of death, but life is not defined by a positive EEG.
    (C) Whatever characteristics a human brain and a bowl of cherry gelatin have in common are important factors in life and death.
    (D) If a person's brain waves become flat, as measured by the EEG, that person is less alive than is a bowl of cherry gelatin.
    (E) Whether a person's EEG readings change or not is irrelevant in determining whether or not that person is alive.
   
8. Child abuse could be eliminated if prospective parents were certain they wanted children before they had them. The assertion above can be true only if which of the following is also true?
    (A) Prospective parents change their minds about wanting children once they have them.
    (B) Those who love children do not abuse them.
    (C) Those who did not want to have their children often keep them.
    (D) Only those who do not love their children abuse children.
    (E) Only those who were not sure they wanted to have their children abuse children.
Questions 9-13
   
    Every morning five commuters, M, N, O, P, and Q, go to one railroad station and board a train that stops at exactly six subsequent stations, numbered 1-6; the train stops first at station 1 and proceeds in Numerical order to station 6.
    M always gets off either at station 1 or at station 2.
    O always gets off the station before or one station after Q's station.
    P always gets off at station 3.
    Q always gets off at station 4, 5, or 6.
    No one reboards the morning train after getting off.
   
9. On a morning when no one gets off at stations 5 and 6, which of the following must be true?
    (A) M gets off at station 2.
    (B) N gets off at station 2.
    (C) O gets off at station 4.
    (D) N and P get off at the same station.
    (E) O and P get off at the same station.
   
10. On a morning when Q gets off at station 4, and no more than two of the commuters get off at any one station, which of the following must be true?
    (A) If N gets off at station 2, M gets off at station 1.
    (B) If N gets off at station 3, O gets off at station 5.
    (C) If N gets off at station 4, O gets off at station 5.
    (D) If O gets off at station 3, N gets off at station 2.
    (E) If O gets off at station 3, N gets off at station 5.
   
11. Stations at which it is possible for N and O to be the only commuters getting off the morning train include which of the following?
    Ⅰ. Station 3
    Ⅱ. Station 4
    Ⅲ. Station 5
    (A) Ⅰonly
    (B) Ⅲ only
    (C) Ⅰand Ⅱ only
    (D) Ⅱ and Ⅲ
    (E) Ⅰ, Ⅱ, and Ⅲ
   
12. On a morning when no one gets off at station 1, and each of the five commuters gets off at a different station, which of the following GANNOT he true?
    (A) N gets off one station before Q.
    (B) P gets off one station before O.
    (C) M gets off at station 2.
    (D) N gets off at station 5.
    (E) Q gets off at station 6.
   
13. A new commuter, R, joins the group and gets off every morning at station 5. On a morning when two commuters gets off at the same station and all other commuters get off alone, which of the following could be the station at which the two commuters get off?
    (A) Station 1
    (B) Station 2
    (C) Station 3
    (D) Station 4
    (E) Station 6
您需要登录后才可以回帖 登录 | 注册

本版积分规则

Copyright © 2020-2021 tigtag.com |网站地图  
快速回复 返回列表 返回顶部