[請益] TPO Glacier Formation
看板TOEFL_iBT (TOEFL_iBT托福)作者chime0515 (我愛劉德華)時間15年前 (2011/06/23 15:36)推噓1(1推 0噓 5→)留言6則, 3人參與討論串1/2 (看更多)
Paragraph2: Glaciers are open systems, with snow as the system's input and
meltwater as the system' s main output. The glacial system is governed by two
basic climatic variables: precipitation and temperature. For a glacier to
grow or maintain its mass, there must be sufficient snowfall to match or
exceed the annual loss through melting, evaporation, and calving, which
occurs when the glacier loses solid chunks as icebergs to the sea or to large
lakes. If summer temperatures are high for too long, then all the snowfall
from the previous winter will melt. Surplus snowfall is essential for a
glacier to develop. A surplus allows snow to accumulate and for the pressure
of snow accumulated over the years to transform buried snow into glacial ice
with a depth great enough for the ice to flow. Glaciers are sometimes
classified by temperature as faster-flowing temperate glaciers or as
slower-flowing polar glaciers.
6. Paragraph 2 implies that which of the following conditions produces the
fastest moving glaciers?
○A climate characteristic of the polar regions
○A thick layer of ice in a temperate climate F Long,
○Warm summers
○Snow, firm and ice that have been buried for several years
答案為B, 不過從最後一句看, 我覺得答案C比較合理耶
謝謝解答!
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