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
2015-12-31
12
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.
Judging from the passage, the most important advantage of hydroponics should be______.
选项
A、higher yield
B、lower labor costs
C、more automation
D、less hard manual work
答案
A
解析
本题问从文章内容判断,水栽法最重要的优点是什么。根据全文的主题:水栽法最重要的好处是能大量生产粮食,解决世界未来的粮食短缺问题。因此,本题的正确答案应是A“能使农作物高产”。
转载请注明原文地址:https://kaotiyun.com/show/k9PO777K
0
在职攻硕英语联考
相关试题推荐
Woman:Next,shouldn’twegetatelephoneinstalledinthehall?Man:Fixingtheshowerpipeisfarmoreimportant.Question:Wh
Woman:Yourdormitoryroomisn’tverylarge,isit?Man:Icanhardlyturnaroundinit.Question:Whatdoesthemanmean?
IfthepopulationoftheEarthgoesonincreasingatitspresentrate,bythemiddleofthe21stcenturywe______alltheoilthat
Althoughherefusedtoactonmysuggestion,hehadtoadmitthat______whatIsaid.
Thoughthisapparatusisexpensive,thepatientagreedtouseitaftertheoperationbecauseitcould______thepain.
Modernliberalopinionissensitivetoproblemsofrestrictionoffreedomandabuseofpower.Indeed,manyholdthatamancanb
Rescueteamsfromallovertheworldontheearthquake-strickenareaafterthenewsspreadthatthequake,whichmeasured7.9o
Heatisalwaysbeingtransferredinonewayoranother,______thereisanydifferenceintemperature.
TheWarrantyHoldingsGroup,aEuropeanleaderinmechanicalbreakdowninsuranceandaresearcherandcommentatorontrendsinm
AdamSmithwasmefounderofeconomicsasadistinctfieldofstudy.Hewroteonlyonebookonthesubject—TheWealthofNatio
随机试题
A.高信号B.低信号C.混杂信号D.长T1,长T2信号E.等信号肿瘤骨在SE序列T1WI、T2WI均是
对原发性肝癌最有效的治疗方法是
在火灾扑救中,如果能阻断火灾三要素的任何一个要素就可以扑灭火灾。火灾的三要素是指()。
审计人员应利用专业判断来评价审计风险和设计审计程序,以保证将审计风险降至最低水平。()
从事生产、经营的纳税人外出经营,在同一地累计超过()天的,应当在营业地办理税务登记手续。
甲公司是一家模具生产企业,只生产一种产品。产品分两个生产步骤在两个基本生产车间进行,第一车间为第二车间提供半成品,第二车间将半成品加工成产成品,每件产成品耗用2件半成品。甲公司采用平行结转分步法计算产品成本,月末对在产品进行盘点,并按约当产量法在完工产品和
下列公民实施的民事行为有效的是()。
有句俗话叫“三岁看大,七岁看老”,这句话体现了哪种因素对人格的影响?()
下列各组软件中,完全属于系统软件的一组是
Software(ofcomputers),isalsocalledcomputerprograms,whichreferstoinstructionsthatcausethehardware—themachines—to
最新回复
(
0
)