首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
In 1798 the political economist Malthus predicted that in time mankind would face starvation, having outgrown the available food
In 1798 the political economist Malthus predicted that in time mankind would face starvation, having outgrown the available food
admin
2012-07-17
61
问题
In 1798 the political economist Malthus predicted that in time mankind would face starvation, having outgrown the available food supplies. Today, a century and a half later, there are still experts who forecast the same global disaster—unless urgent measures are taken to prevent it.
By the end of the present century there may well be over five thousand million people living on this globe, an increase of over fifty percent on today’s figure. In order to keep pace with this increase in mankind the farmers of the world will have to step up their production of food by at least two percent every year. Such a rate of increase has never been maintained in any country by conventional methods of agriculture, despite modern mechanization and the widespread use of fertilizers. There are no large worthwhile reserves of potential farmland remaining, and good fertile land is continually being changed into industrial use. Moreover, erosion of the soil takes a constant toll (损失).
Intensive research, carried out over many years in all manners of climate conditions, has produced a revolutionary method of growing crops without using any soil at all. Hydroponics (水栽 法), as this technique is called, may well be the answer to all our food worries; already it has accomplished wonders in producing huge crops. Hydroponics was once a complicated and expensive business, now it is well out of the experimental stage. Labor costs are far lower than when normal methods of agriculture are employed. In fact, it is a completely automatic system. There is no hard manual work, no digging or ploughing, and no weeding to speak of. Yields can be far higher than they are in soil.
Which of the following best sums up the whole passage?
选项
A、Malthus’ prediction has been proved to be correct by modern experts.
B、Hydroponics is a new development in agriculture.
C、Hydroponics may be the answer to the world food shortage in the future.
D、Conventional methods of agriculture should be improved so as to step up food production by two percent every year.
答案
C
解析
本题问下面哪个选项可以最好地概括全文内容。利用浏览式阅读法,根据文章第一段和第三段:早在1798年,政治经济学家马尔萨斯就预言,人类总有一天会由于人数增长超过了可获取的食物资源而面临挨饿的危险。一个半世纪后的今天,仍有专家预测说除非采取紧急措施来阻止这一灾难,否则的话,仍会面临全球性的灾难。而经过多年在各种气候条件下的广泛研究,研究人员已研制出一种具有革命性的种植方法,无土栽培法也称为水栽法。这种方法可能会缓解我们对粮食的焦虑,而且这种方法已经成功地栽培出了许多大型庄稼,创造了奇迹。因此,全文的主题是介绍水栽法可能是解决未来世界粮食短缺问题的一个好办法。所以,本题的正确答案应是C。
转载请注明原文地址:https://kaotiyun.com/show/zEXO777K
0
在职攻硕英语联考
相关试题推荐
Sincetheearlynineties,thetrendinmostbusinesseshasbeentowardon-demand,always-availableproductsandservicesthatsu
Fiftyvolunteerswerealphabeticallydividedintotwoequalgroups,GroupAtoparticipate【C1】______a7-weekexerciseprogram,a
IntheUnitedStatesandinmanyothercountriesaroundtheworld,therearefourmainwaysforpeopletobe【C1】______aboutdeve
IntheUnitedStatesandinmanyothercountriesaroundtheworld,therearefourmainwaysforpeopletobe【C1】______aboutdeve
TheJapanesedesireformarriagehadbeenverystrong.Inthefifth""worldyouthattitudesurvey""【C1】______bytheManagementa
Cultureisactivityofthought,andreceptivenesstobeautyandhumanefeeling.【C1】______ofinformationhavenothingtodowith
InthepostColdWarworldfewarticleshaveinfluencedhowWesternpolicymakersviewtheworldmorethanSamuelHuntington’s19
Wearepreparedtosatisfyallyour______claims.
ThePonyExpressisanoutstandingexampleofcourage,endurance,anddeterminationinthewestwardexpansionoftheUnitedStat
随机试题
某单位现有职工120人,年工资总额2400000元,每人每年平均缴纳社会保险费1000元,请列出算式并计算该单位的投保费率。
被评估设备为1995年从德国引进设备,进口合同中的FOB价是20万马克。2000年10月进行评估时德国厂家已不再生产这种待估设备了,其替代产品的FOB报价为35万马克,而国内其他企业2000年6月从德国进口同种设备的CIF为30万马克。按照通常情况,设备的
国际收支不均衡调节的宏观经济政策包括()。
对企业而言,发行股票筹资的优点有()。
《自然保护区条例》规定,凡具有下列条件之一的,应当建立自然保护区:()。
阅读下列材料,回答问题。现在的世界是开放的世界。中国在西方国家产业革命以后变得落后了,一个重要原因就是闭关自守。经验证明,关起门来搞建设是不能成功的,中国的发展离不开世界。当然,像中国这样的大国搞建设,不靠自己不行,主要靠自己,这叫自力更生。但是,在坚
1,1,2,2,4,8,12,()
马克思主义哲学之所以是科学的,就在于它坚持了()。
证明(xeax)(n)=(ax+n)an-1eax(a≠0),n=1,2,….
TheHumanBrainThebrainisthemostcomplexorganinhumanbody.Itproducesoureverythought,action,memory,feelingan
最新回复
(
0
)