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发布时间：2006-06-22 13:27     点击：

    (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.

    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

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