题目

Skyscrapers are the symbol of Urban life.City people are used to seeing tall buildings and apartments. Farms，on the other hand,are associated with rural(农村的)life.However，there are experts who think skyscrapers should become farms to meet the increasing food needs.By the middle of this century, some scientists suggest，almost 80% of the earth's population could live in cities. In addition，the population could increase to 9.1 billion people during that time yet the amount of land available for farming will be the same.If current farming practices don't change，we will need an area of new land to produce enough food for the planet.Vertical farms, where urban farmers could grow crops in environmentally friendly skyscrapers, could be the solution. In spite of concerns over high costs, experts want to make it a reality and use these skyscrapers to grow crops.Vertical farms would have many advantages, supporters say. Unlike traditional farming, vertical farming could be free of chemicals and diseases. Besides, crops would not suffer from problems like flooding. Finally，vertical farms would reduce the cost and negative effects of transporting food over long distances.Some argue that although crops growing in a tall glass building would get natural sunlight during the day，it wouldn't be enough. For this reason，vertical farms would need additional light sources(来源), such as artificial light.Another way of growing fresh food is to build urban farms on rooftops. This more practical approach may be more achievable than the idea of farms in skyscrapers, researchers suggest. Experts agree that innovative(革新的)farming practices are needed to support the need for more food at affordable costs, both to the farmer and to the consumer,but the best ideas could be yet to come.【1】What primary problem could vertical farming settle？A. Poor state of rural life.B. Shortage of food supply.C. High cost for transporting crops.D. Environmental pollution by transitional farmings【2】What is the advantage of vertical farming?A. It can produce organic food.B. It requires little care.C. It can benefit transport industry.D. It needs very low cost.【3】What is a big challenge to make vertical farming a reality?A. Farmable land. B. Crop diseasesC. Light sources. D. Climate conditions.【4】What can be the best title of the test?A. Future Food NeedsB. Symbol of Urban LifeC. Farming on RooftopsD. Farms of the Future 答案：【答案】【1】B【2】A【3】C【4】D【解析】本文属于说明文，为了解决日益增长的食物需求，专家介绍了两种在高楼大厦可以发展的农业，垂直农业和屋顶农场。【1】推理判断题。根据第三段Vertical farms, where urban farmers could grow crops in environmentally friendly skyscrapers, could be the solution.可知，发展垂直农业可能是解决食物紧缺的方法，故选B。【2】细节理解题。根据第四段Unlike traditional farming, vertical farming could be free of chemicals and diseases.可知，垂直农业不受化学物品和病虫害的影响，故可以生产有机食品，故选A。【3】细节理解题。根据倒数第二段Some argue that although crops growing in a tall glass building would get natural sunlight during the day，it wouldn't be enough.可知，垂直农业最大的问题就是光线不够，需要额外的光源，故选C。【4】主旨大意题。为了解决日益增长的食物需求，专家介绍了两种在高楼大厦可以发展的农业，垂直农业和屋顶农场，故主要介绍未来的农业类型，故选D。主旨大意题的做题技巧。这类试题要求对文章的整体或局部（如段落）进行分析、概括，归纳相关部分的中心大意(Main idea)，选择标题(title)，判断作者的写作目的(purpose)等，旨在考查考生加工与浓缩信息的能力。这一项考查的是文章的灵魂与中心。记叙文、议论文常考文章的主旨大意。一般主旨大意常出现在文章的开头，有时也出现在结尾。当然更重要的是从全文去把握。首先，任何一篇文章都是围绕某个主题展开的，因此，许多文章中最明显的特点之一是有一个反复出现的中心词，即高频词，也叫做主题词。抓住了它，便容易抓住文章的中心。第二，要搞清是问某一段还是全文的大意。可利用段落信息来把握文脉，进行综合归纳，概括文章的主题。如有标题，标题中的蕴含的信息往往是关键信息。第三: 要学会借助文章的结构来把握中心思想。段落中心思想常常由主题句( Topic sentence)来表达。主题句常常出现在段首(60%--90%)或段尾处, 有时也在段落中间。同样, 一篇文章的中心思想也常常在开始段或结尾段点出。因此, 在阅读中, 我们要对文章的开始段和结尾段及段落的主题句给予特别的注意。小题5，根据前面两段的介绍可知，为了解决日益增长的食物需求，专家介绍了两种在高楼大厦可以发展的农业，垂直农业和屋顶农场，故主要介绍未来的农业类型，故选D。

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