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发布时间：2006-06-22 13:29     点击：

    16. DROLL: LAUGH::

    (A) grisly: flinch  (B) bland: tire

    (C) shrill: shriek  (D) coy: falter

    (E) wily: smirk

    The transfer of heat and water vapor from the ocean to the air above it depends on a disequilibrium at the interface of the water and the air. Within about a mil- limeter of the water, air temperature is close to that of the surface water, and the air is nearly saturated with water vapor. But the differences, however small, are crucial, and the disequilibrium is maintained by air near the surface mixing with air higher up, which is typically appreciably cooler and lower in water-vapor content. The air is mixed by means of turbulence that depends on the wind for its energy. As wind speed increases, so does turbulence, and thus the rate of heat and moisture transfer. Detailed understanding of this phenomenon awaits further study. An interacting-and complicat- ing-phenomenon is wind-to-water transfer of momen- tum that occurs when waves are formed. When the wind makes waves, it transfers important amounts of energy-energy that is therefore not available to provide turbulence.

    17. The primary purpose of the passage is to

    (A) resolve a controversy

    (B) describe a phenomenon

    (C) outline a theory

    (D) confirm research findings

    (E) classify various observations

    18. According to the passage, wind over the ocean gen- erally does which of the following?

    I. Causes relatively cool, dry air to come into proximity with the ocean surface.

    II. Maintains a steady rate of heat and moisture transfer between the ocean and the air.

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