Todaytherearemanyfiresthaninthepast.Over100,000wildf...

问题详情：

    Today there are many fires than in the past. Over 100,000 wildfires burn each year in America. Russia has 20,000 to 35,000 wildfires every year. Australia has on average 60,000 each year. These fires destroy（损害）huge areas of forests and burn hundreds of homes.

Many experts believe there are several reasons for this sudden increase in fires. The first reason is climate（气候）change. Recent weather has been warmer and drier. This leads to dangerous fire conditions. When lightening strikes（发生雷电），dry grass easily catches fire. Hot winds add to the problem. The wind spreads a fire quickly. In 2010, Russia had the hottest and driest summer in a century. In just one month, 500 fires destroyed over 2,000 homes. Some people lost their lives.

Traditional fire-fighting practices are another reason for the increase in fires. In America, firefighters used to quickly put out every fire. They didn’t allow the grass and trees to burn. As a result, today many forests have thicker vegetation（植被）ker vegetation means more fuel（燃料）for fires. Also, without fires from time to time, forests become overcrowded and unhealthy. Some trees are dead. The dead wood then easily catches fire. So surprisingly, America has many more fires today partly because of its past fire-fighting practices.

Scientists now understand that a fire can be a natural part of a healthy forest. As a result, countries like Australia allow more fires to burn naturally. Sometimes, fire fighters even start fires to get rid of（去除）dead wood. Of course, they carefully control the fires. The fire thins out old trees. This allows sunlight to reach the ground. As a result, fires help new trees to grow. Therefore, if a fire is not a serious threat（威胁）to people, firefighters may let it burn naturally.

233．Why did Russia have so many fires in one month in 2010?

A．Because lightening spread the fire.

B．Because there was much fuel for fires.

C．Because there were not enough firefighters.

D．Because it was unusually hot, dry and windy.

234．What happens because of the traditional fire-fighting practices in the USA?

A．There are fewer wildfires.

B．Trees and grass become thicker.

C．The weather becomes warmer and drier.

D．Sunlight reaches the ground to help forests.

235．What is the main idea of Paragraph 4?

A．Fires are serious threats to human beings.

B．Australian firefighters don’t put out fires.

C．Fires can play an important role I forests.

D．It’s difficult for firefighters to control the fires.

236．Which of the following is true according to the passage?

A．Not all the fires in the forests must be put out.

B．People’s carelessness leads to dangerous fires.

C．Australia allows all the fires to burn naturally.

D．There are more fires in Russia than in the USA．

【回答】

233．D

234．B

235．C

236．A

【分析】

现在的火灾比过去更多了。每年有许多火灾发生，摧毁了许多森林和人们的家园，什么原因引发了更多的火灾？如何控制火让其更好地服务于人类？本文分析了引发火灾的原因及怎样控制火灾。

233． 推理判断题。题意：为什么俄罗斯2010年一个月内发生了那么多的火灾？A. Because lightening spread the fire.因为雷电引发火灾；B. Because there was much fuel for fires.因为我太多的燃料；C. Because there were not enough firefighters.因为消防员不够；D. Because it was unusually hot, dry and windy.因为天气不同寻常地热、干燥及多风。从文中的“In 2010, Russia had the hottest and driest summer in a century.”（2010年，俄罗斯经历了一世纪以来最热、最干的有夏天）可以推测出本题选D。

234．细节理解题。题意：在美国，因为传统的消防，发生了什么事？A. There are fewer wildfires.野火更少了；B. Trees and grass become thicker.树更多草更密了；C. The weather becomes warmer and drier.天气变得温暖干燥了；Sunlight reaches the ground to help forests.太阳*到地面帮助森林成长。从短文第3自然段，由于禁止山火，植被长得更加茂盛，故选B。

235． 主旨归纳题。题意：第4自然段的主要意思是什么？A. Fires are serious threats to human beings.人类认真对待火灾；B. Australian firefighters don’t put out fires.澳大利亚的消防员不灭火； C. Fires can play an important role I forests.火对森林起着重要的作用；D. It’s difficult for firefighters to control the fires.消防员控制火灾是件难事。第四自然段指出，火对于森林有着特殊的作用，可以烧去死去的树木，让阳光照耀地面，可以帮助幼树成长……，故选C。

236． 推理判断题。题意：根据短文内容下面哪一个是对的？A. Not all the fires in the forests must be put out.不是森林中的所有火都必须扑灭；B. People’s carelessness leads to dangerous fires.人们的粗心导致严重的火灾；C. Australia allows all the fires to burn naturally.澳大利亚允许所有的火自然地燃烧；D. There are more fires in Russia than in the USA.俄罗斯比美国有更多的火灾。由短文第四自然段可知：火可以烧去死去的树木，让阳光照耀地面，可以帮助幼树成长，火对森林也有积极的作用。所以不是所有的火都得扑灭，故选A。

知识点：方法与哲理

题型：阅读理解