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  3. In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、

In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、

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问题 In the following text, some sentences have been removed. For Questions 41-45, choose the most suitable one from the list (A、B、C、D、E、F、G……) to fit into each of the numbered blank. There are several extra choices, which do not fit in any of the gaps. (10 points)

    Policy-makers and the media, particularly in the United States, frequently assert that climate science is highly uncertain. Some have used this as an argument against adopting strong measures to reduce greenhouse gas emissions. For example, while discussing a major U.S. Environmental Protection Agency report on the risks of climate change, then EPA administrator Christine Whitman argued, "As the report went through review, there was less consensus on the science and conclusions on climate change". Some corporations whose revenues might he adversely affected by controls on carbon dioxide emissions have also alleged major uncertainties in the science. (41)______.
    The scientific consensus is clearly expressed in the reports of the Intergovernmental Panel on Climate Change (IPCC). Created in 1988 by the World Meteorological Organization and the United Nations Environmental Programme, IPCC’s purpose is to evaluate the state of climate science as a basis for informed policy action, primarily on the basis of peer-reviewed and published scientific literature.
In its most recent assessment, IPCC states unequivocally that the consensus of scientific opinion is that Earth’s climate is being affected by human activities: "Human activities...are modifying the concentration of atmospheric constituents...that absorb or scatter radiant energy....Most of the ob served warming over the last 50 years is likely to have been due to the increase in greenhouse gas concentrations".
    IPCC is not alone in its conclusions. (42)______. For example, the National Academy of Sciences report, Climate Change Science: An Analysis of Some Key Questions, begins: "Greenhouse gases are accumulating in Earth’s atmosphere as a result of human activities, causing surface air temperatures and subsurface ocean temperatures to rise". The report explicitly asks whether the IPCC assessment is a fair summary of professional scientific thinking, and answers yes. (43)______.
    Others agree. The American Meteorological Society, the American Geophysical Union, and the American Association for the Advancement of Science (AAAS) all have issued statements in recent years concluding that the evidence for human modification of climate is compelling.
    The drafting of such reports and statements involves many opportunities for comment, criticism, and revision, and it is not likely that they would diverge greatly from the opinions of the societies’ members. Nevertheless, they might downplay legitimate dissenting opinions. (44)______.
    The 928 papers were divided into six categories: explicit endorsement of the consensus position, evaluation of impacts, mitigation proposals, methods, paleoclimate analysis, and rejection of the consensus position. Of all the papers, 75% fell into the first three categories, either explicitly or implicitly accepting the consensus view; 25% dealt with methods or paleoclimate, taking no position on current anthropogenic climate change. Remarkably, none of the papers disagreed with the consensus position.
    (45)______.
This analysis shows that scientists publishing in the peer-reviewed literature agree with IPCC, the National Academy of Sciences, and the public statements of their professional societies. Politicians, economists, journalists, and others may have the impression of confusion, disagreement, or discord among climate scientists, but that impression is incorrect.

A. Many details about climate interactions are not well understood, and there are ample grounds for continued research to provide a better basis for understanding climate dynamics.
B. Such statements suggest that there might be substantive disagreement in the scientific community about the reality of anthropogenic climate change. This is not the case.
C. In recent years, all major scientific bodies in the United States whose members’ expertise bears directly on the matter have issued similar statements.
D. Admittedly, authors evaluating impacts, developing methods, or studying paleoclimatic change might believe that current climate change is natural. However, none of these papers argued that point.
E. That hypothesis was tested by analyzing 928 abstracts, published in referent scientific journals between 1993 and 2003, and listed in the ISI database with the keywords "climate change".
F. If the history of science teaches anything, it is humility, and no one can be faulted for failing to act on what is not known.
G. The IPCC’s conclusion that most of the observed warming of the last 50 years is likely to have been due to the increase in greenhouse gas concentrations accurately reflects the current thinking of the scientific community on this issue.

选项
答案G
解析 在前面给出国家科学院对于该项结论的认同之后，作者指出：该报告明确提出疑问，IPCC的评估是否是对专业的科学思维的客观总结，而答案是肯定的。可以预见，正确选项内容应该是对这个肯定回答做出的解释说明。而G中的The IPCC’s conclusion reflects the current thinking of the scientific community正是对该句的阐释，这里的the current thinking of the scientific community与前面的scientific thinking属于词汇复现，故G为答案。
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