Sentence Completion 解析1

●Passage分析

A. Today, most people are still unaware of the gravity of the problems raised by global warming.Currently, the Earth's temperature is 1 to 2 degrees Fahrenheit higher than before, and sea levels are 20 centimeters higher than they were more than a hundred years ago.Although some individuals may not see the significance of such data, many scientists, environmentalists and concerned citizens are alarmed by the current unnatural warming rate of the Earth.This is because human-provoked global warming brings with it damaging effects that are closely tied to each other.

B. Global warming causes sea levels to rise in two ways.First, as more heat becomes trapped in the Earth, temperatures rise.Rising atmospheric temperatures will cause the melting of locked water from polar ice caps and continental ice sheets.Second, the volume of water increases as water molecules expand in response to heat, which is called thermal expansion.The rise in sea levels endangers low-lying areas, coastal regions and coastal habitats.It will increase flood risk and coastal erosion and cause changes in the quality of groundwater.People in small islands and archipelagos will lose homes, accompanied by the loss of cultural resources and values.Rising sea levels will also be detrimental to tourism, aquaculture and agriculture.

C. The cry for change has never been more insistent than it is today, as the world's temperature has drastically risen over the past few years, endangering life and the environment.Hopefully, people and governments will be able to properly address the issue and offer a rapid response in order to alleviate or turn the problem around.

·段落A：提出最近的气温与海平面上升等气候变化都属于地球温室效应的副作用，并揭示温室效应对地球造成严重影响。

·段落B：从两个方面说明地球温室效应使海平面上升的原因。第一，气温的上升导致极地冰盖与大陆冰盖融化；第二，水分子受热膨胀，导致水的体积增加。同时还说明了温室效应导致的大陆沿岸的侵蚀、洪水等问题。

·段落C：由于地球温室效应的加剧，生物与环境面临着严重的危机，因此文章强调需要为此积极采取措施。

●Question　分析与答案

1.Sea levels have risen by____in just a span of a century.

2.___is the rise in the volume of matter as a reaction to increases in temperature.

3.Rising sea levels will also affect the___of freshwater sources and water beneath the Earth's surface.

正确理解海平面上升现象有多严重；地球温室效应从哪个方面导致海平面上升等内容是至关重要的。

词汇巩固unaware不知道的，未察觉到的　Fahrenheit华氏的　significance重要，重要性　concern关系到　aIarm闹铃，警报　atmospheric大气的，空气的　meIting融化的，溶解的　poIar极地的　continentaI大陆的　moIecuIe分子　thermaI热的，温热的　expansion扩张，膨胀　Iow-Iying低的，低洼的　coastaI沿岸的　habitat栖息地　flood洪水　erosion腐蚀，侵蚀　archipeIago群岛　accompany伴随　detrimentaI有害的　aquacuIture水产养殖agricuIture农业　insistent强迫的，坚持的　drasticaIIy大大地，彻底地　aIIeviate减轻，缓和　reaction反作用，反动　fresh water淡水　beneath在……的下方