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  10
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] 【C12】
选项 A、lasting
B、duration
C、continuation
D、expansion
答案 B
解析 词汇题。词义辨析题。lasting意为“耐久的”，强调持续或保持的时间长久，如：Weare an fighting for a lasting peace．我们全都为持久的和平而奋斗。本句表示时间的持续。持续时间可长可短，没有“时间长久”的含义，因此，不能选此项。duration表示“持续时间，延续性，持续”，指时间上的延续，长短不论，都包含其中，如：We will have asummer vacation of eight week’s duration．我们将有八周的暑假。也就是说暑假的时间延续八周。本句指环境的冷却所需时间长短，也就是冷却过程的持续时间，因此，duration符合题意，为正确答案。continuation表示“继续”，指将已开始了的行为继续下去，如：Continuation of the meeting was delayed until the next day．会议推迟到第二天继续进行。此选项不合题意。expansion表示“扩大，扩展，延长”，如：Here are theplans for the expansion of our school building．这是扩大我们学校的建设计划。expansion表空间上的扩大，但不表时间上的延长。因此，也不合题意。
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