2. 外语
  3. The warming of the Earth【C1】______over the last 100 years will be due to a combination of many factors. Warming due to the incre

The warming of the Earth【C1】______over the last 100 years will be due to a combination of many factors. Warming due to the incre

admin2011-03-07  21
问题     The warming of the Earth【C1】______over the last 100 years will be due to a combination of many factors. Warming due to the increase in greenhouse gases【C2】______determined so far. 【C3】______, projections of greenhouse warming do not rest on recent observations, they come from【C4】______understanding of the climate system. A【C5】______of simple and complex computer models【C6】______over the last 30 years to put together knowledge of many climate processes.
    【C7】______to some scientific opinion, current models do a reasonable job of【C8】______today’s climate. The difference between summer and winter temperatures, in【C9】______to change in heating from the Sun, is correctly stimulated to【C10】______about 0.5 degrees over much of the planet.【C11】______events provide additional tests of our understanding. For example, the scale and【C12】______of cooling due to the eruption of Mt. Pinatubo were【C13】______by climate models.
    When greenhouse gases are increased in climate models, the response is always an increase in average temperatures and water vapor. Models【C14】______in their result but, in virtually all【C15】______, doubling the amount of carbon dioxide increase global average temperatures【C16】______between 1. 5℃ and 4℃. Why are there some dissenting【C17】______heard on the science of climate change?【C18】______it【C19】______that critics are simply unaware of the depth of the science developed so far.
    Others are concerned【C20】______we do not understand everything about the climate system.
【C13】
选项 A、directed
B、created
C、made
D、reproduced
答案D
解析 词汇题。词义辨析题。direct表示“管理，指导”，如：He personally directed thenation’s foreign policy．他亲自掌管国家的外交政策。此处不表计算机模型管理这种自然现象，因此，不合题意。create表示“创造，造成，引起”，指使某事或物从无到有，如：It’s bound to create trouble sooner or later．注定迟早要引起麻烦。make表示“制造，建造”，如：make a dress做衣服。计算机模型一不是用来引起(create)火山爆发的，也不是用来制造(make)火山爆发的，因此，以上两选项均不合题意。reproduce表示“复制，仿造，再造”，如：The actors reproduced the running horses by pounding pillows．演员们捶打枕头模拟奔马的声音。此处的含义为“模拟火山爆发这种自然现象所引起的冷却规模和持续时间”，可见reproduce“模拟这种现象”正合题意，为正确答案。
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