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

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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.
【C14】
选项 A、differ
B、change
C、vary
D、move
答案C
解析 词汇题。词义辨析题。vary可做不及物动词，意为“不同，变化”，如：Her mood varieswith the weather．她的情绪随天气的变化而变化。此处为模型产生的结果不同，含义与用法都符合题意，为正确答案。differ也可做不及物动词，表示“不同，相异”，指在本质、性质、数量或形式上均不相同，如：Ambition differs from greed．雄心与贪心截然不同。从后面所得的结论来看，各种结果差别很小，而且只是数量上的差异，并无本质的区别，因此，不合题意。change“变更，改变”，指变得不同或经历转变，指本质上或外形上的改变，如：He changed as hematured．长大后他改变了。指自身外形、性格特点等的变化。此选项也不合题意。move意为“移动”，从一个位置向另一个位置的变化，如：He moved away from the window．他从窗户那走开了。显然，此选项也不合题意。
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