2. 职称英语
  3. The warming of the Earth【C1】______over the last 100 years will be due to a c

The warming of the Earth【C1】______over the last 100 years will be due to a c

游客2024-10-19  1
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. [br] 【C1】
选项 A、observed
B、observing.
C、to observe
D、has been observed
答案 A
解析 语法题。本句的主要句子结构为The warming of the Earth…will be…，因此。空格的词为定语，修饰前面的主语，而主语与observe之间为被动关系，是观察的对象。选项observed作为动词的过去分词形式，可做定语修饰前面的名词，表被动，正合题意，因此，为正确答案。observing作为动词的现在分词形式，也可做定语修饰前面的名词，但与所修饰的名词之间为主动关系，因此，是错误答案。to observe是动词的不定式形式，也可做定语修饰前面的名词，但含有将来的意义，此处表“所观察到的”，因此，与题意不合。has been observed不能用作定语修饰前面的名词，只能做表语，构成系表结构。
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