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发布时间：2006-06-22 13:29     点击：

    (E) insistence on condemning human faults and weaknesses

    19. Which of the following is the most accurate description of the organization of the passage?

    (A) A sequence of observations leading to a prediction

    (B) A list of inferences drawn from facts stated at the beginning of the passage

    (C) A series of assertions related to one general subject

    (D) A statement of the major idea, followed by specific examples

    (E) A succession of ideas moving from specific to general

    It has long been known that the rate of oxidative metabolism (the process that uses oxygen to convert food into energy) in any animal has a profound effect on its living patterns. The high metabolic rate of small animals, for example, gives them sustained power and activity per unit of weight, but at the cost of requiring constant consumption of food and water. Very large animals, with their relatively low metabolic rates, can survive well on a sporadic food supply, but can gen- erate little metabolic energy per gram of body weight. If only oxidative metabolic rate is considered, there- fore, one might assume that smaller, more active, animals could prey on larger ones, at least if they attacked in groups. Perhaps they could if it were not for anaerobic glycolysis, the great equalizer.

    20. The primary purpose of the passage is to

    (A) refute a misconception about anaerobic glycolysis

    (B) introduce a new hypothesis about anaerobic glycolysis

    (C) describe the limitations of anaerobic glycolysis

    (D) analyze the chemistry of anaerobic glycolysis and its similarity to oxidative metabolism

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