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.
【C17】
选项 A、sounds
B、voices
C、comments
D、studies
答案B
解析 词汇题。词义辨析题。voice可表示“意见，看法”，如：Our group rejected the pro—posal with one voice．我们小组一致反对此提议。此处表示“不同看法”，与前面第二段提到的Contrary to some scientific opinion(与一些符合科学的意见相反)正好形成呼应，因此，符合题意，为正确答案。sound意为“声音，响声，很明显的吵闹声、嘈杂声”，如：Have you heard a hollow sound?你听到一声沉闷的声响了吗?sound不能表示“意见”，因此，不合题意。
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