高考英语模拟试题阅读理解精选编讲第019篇——秒词邦背单词app

About 20, 000 years ago, much of Europe, Asia, North and South America was covered by huge sheets of ice, each many kilometers thick. Since then, the ice has gradually melted and the ice sheets have retreated. Today, the only ice sheets on Earth’s land masses are found in Antarctica and Greenland. Some ice also occurs as glaciers in mountainous regions and as floating ice floes (浮冰块) in the Arctic Ocean and around Antarctica.

At first sight, these remote left-overs from the last Ice Age seem of little importance for most of us today. However, nothing could be further from the truth. Many scientists believe that our planet is warming as a result of the greenhouse gases that we are pumping into the atmosphere. If the planet becomes warmer, the ice sheets will start to melt, causing sea level to rise perhaps several meters by the end of this century. Such a rise would cause widespread flooding of low-lying coastal areas and threaten many large cities.

Observations from space suggest that parts of the major ice sheets are beginning to melt more rapidly. Meanwhile, recent satellite images have also shown that unusually large areas of sea ice have been melting during the Arctic summer. Although sea level will not be affected by the melting of the floating ice, there will be other important environmental changes. For example, ice sheets act like a mirror, reflecting sunlight and cooling Earth. If the ice disappears, Earth is likely to become warmer and major climate changes could occur. wildlife living in the polar regions may also be destroyed.

大约2万年前，欧洲、亚洲、北美洲和南美洲的大部分地区都被巨大的冰层覆盖，每片冰层都有几公里厚。从那时起，冰逐渐融化，冰盖也开始退缩。今天，地球陆地上唯一的冰盖是在南极洲和格陵兰岛发现的。一些冰也以冰川的形式出现在山区和漂浮的浮冰中(浮冰块) 在北冰洋和南极洲周围。

乍一看，这些来自上一个冰河时期的遥远遗迹对我们今天的大多数人来说似乎并不重要。然而，事实远非如此。许多科学家认为，由于我们向大气中排放的温室气体，我们的星球正在变暖。如果地球变暖，冰盖将开始融化，到本世纪末，海平面可能会上升几米。这样的上涨将导致低洼沿海地区的大范围洪水，并威胁到许多大城市。

来自太空的观测表明，部分主要冰盖开始更快地融化。与此同时，最近的卫星图像也显示，在北极夏季，异常大面积的海冰正在融化。虽然海平面不会受到浮冰融化的影响，但还会有其他重要的环境变化。例如，冰盖就像一面镜子，反射阳光，冷却地球。如果冰消失，地球可能会变暖，并可能发生重大气候变化。生活在极地的野生动物也可能遭到破坏。

句子成分分析：

[At first sight], these remote left-overs (from the last Ice Age) seem of little importance [for most (of us)] [today].

句子语法结构详解：

* seem 为谓语，采用一般现在时。
* us 为人称代词宾格。the 为定冠词。

句子相关词汇解释：

Phrase:

Vocabulary:

句子成分分析：

[However], nothing could be further from the truth.
Many scientists believe | that our planet is warming [as a result (of the greenhouse gases (that we are pumping into the atmosphere))].

句子语法结构详解：

* be 为系动词作谓语。
* far 为形容词作表语。
* believe 为谓语，采用一般现在时。
* 第1个 that 为连词，引导宾语从句。
* warming 为谓语，采用现在进行时。
* 第2个 that 为关系代词，引导定语从句。
* pumping 为谓语，采用现在进行时。
* can 为情态动词。we 为人称代词主格。our 为形容词型物主代词。nothing 为不定代词。is, are 为助动词。the 为定冠词。a 为不定冠词。

句子相关词汇解释：

Phrase:

Vocabulary:

句子成分分析：

[For example], ice sheets act [like a mirror], reflecting sunlight and cooling Earth.

句子语法结构详解：

* act 为谓语，采用一般现在时。
* reflecting 为现在分词，作状语。
* cooling 为现在分词。
* a 为不定冠词。

句子相关词汇解释：

Phrase:

Vocabulary:

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