Question

We know that the earth has become warmer over the last century. The Intergovernmental Panel on Climate Change (IPCC), a group established by the World Meteorological Organization and the United Nations Environment Program, reports that the average surface temperature of the earth has increased during the twentieth century by 0.6°+ 0.2°C.(The + 0.2°C means that the increase might be as small as 0.4°C or as great as 0.8°C). This may seem like a small shift, but although regional and short—term temperatures do fluctuate(变动) over a wide range, global temperatures are generally quite stable. In fact, the difference between today’s average global temperature and the average global temperature during the last Ice Age is only about 5 degrees C. Indeed, it’s warmer today around the world than at any time during the past 1,000years, and the warmest years of the previous century have occurred within the past decade.

We also know that human activities—primarily the burning of fossil fuels—have increased the greenhouse gas content of the earth’s atmosphere significantly over the same period. Carbon dioxide is one of the most important greenhouse gases, which trap heat near the planet’s surface.

The vast majority of climate researchers agree with these overall findings. The scientific disagreements that do still exist primarily concern detailed aspects of the processes that make up these largely accepted general themes.

You can think of this website as a window into the world of scientific research. In this primer, you’ll find a general discussion of the physical processes underlying the earth’s climate, an outline of the kinds of data that may shed light on how the climate is changing—and the role of human activity in these changes—and a description a some of the questions and uncertainties that researchers continue to explore. This primer is organized into four interconnected sections: the Atmosphere; the Hydrosphere(水圈); the Cryosphere(低温层); and the Biosphere(生物层).

1.We know from the text that “IPCC”___.

A. engages in the climate and changes about the earth.

B. is a group by scientists who like to walk around the moon

C. works in the World Meteorological Organization

D. often greets the passers-by from the outer space

2.We know from the text that carbon dioxide ___.

A. is one of the most important greenhouse gases

B. has fossil fuels

C. traps cold near the planet’s surface

D. exist in human activities

3.From the text, we know when we say the temperature of something has increased by about 0.7+ 0.2°C, the + 0.2°C means___.

A. the increase might by as small as 0.3°C or as great as 0.7°C

B. the increase might by as small as 0.5°C or as great as 0.8°C

C. the increase might by as small as 0.5°C or as great as 0.9°C

D. the increase might by as small as 0.4 C or as great as 0.8°C

4.What would be the best title for this text?

A. What Are the Scientific Disagreements

B. You Can Think of This Website

C. What Do We Know about Global Climate Change?

D. The Vast Majority of Climate Researchers

Answer

1.A

2.A

3.C

4.C

【解析】

试题分析:这篇文章是选自于一个网站的介绍。主要告诉我们目前全球变暖的具体情况，以及网站的其它相关内容。

1.A 细节理解题。根据第一段的The Intergovernmental Panel on Climate Change (IPCC), a group established by the World Meteorological Organization and the United Nations Environment Program,可知该组织是由世界气象组织以及联合国环境规划署成立的，以及该组织报告的内容可知选择A，指该组织致力于地球气候变化的研究。

2.A 细节理解题。根据第二段的Carbon dioxide is one of the most important greenhouse gases, which trap heat near the planet’s surface.可知二氧化碳可以保温，锁住地球表面的热。故选择A，指它是导致温室效应的气体之一。

3.C 推理判断题。根据原文第一段中的by 0.6°+ 0.2°C.(The + 0.2°C means that the increase might be as small as 0.4°C or as great as 0.8°C).可以推断出about 0.7+ 0.2°C, the + 0.2°C应该指0.5到0.9，故选择C。

4.主旨大意题。根据对整篇文章的理解可知，文章主要讲述的是天气逐渐变暖的一些情况，故选择C，指关于全球气候变化我们知道些什么。

考点：考查科普类阅读