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
Crop Problem Advances in technology have helped more of the world’s population live better and longer, and that is part of o
Crop Problem Advances in technology have helped more of the world’s population live better and longer, and that is part of o
admin
2011-01-05
48
问题
Crop Problem
Advances in technology have helped more of the world’s population live better and longer, and that is part of our problems Better health standards have kept larger number of people alive. The world’s population is now almost four billion and expected to double in 25 years. Growing population and slowly rising living standards have increased our need for food at the rate of 30 million tons per year. As a result, the world’s stockpile of food(食物储备) is declining by about 10 million tons per year.
From the early 1950s until 1972 , world food production increased greatly. The Green Revolution (绿色革命) extended scientific techniques to agriculture in the form of hybrid seed (杂交种)and poultry (禽类), chemical fertilizers (化学肥料) and pesticides (杀虫剂), and complex irrigation systems. Strains (品种) of corn (玉米), sorghum (高粱), soybeans (大豆), wheat and rice were developed to flourish under particular climate and soil conditions.
In the United States, corn production rose to 110 bushels(蒲式耳:谷物、水果、蔬菜等容量单位,在英国相当于36, 368升,在美国相当于35, 238升) per acre from only 26 bushels per acre in the early 1900s. Milk production rose to 10, 000 pounds per cow per year, compared with 600 in India. Chickens were bred to eat less, grow to maturity in shorter time, and produce more eggs. As a result of such scientific advances, our twelve midwestern states alone now feed one fourth of the world’s people.
Crop disaster in 1972 brought an apparent end to the growth in production. Much of the extra yields had come from the use of chemical fertilizers, primarily petroleum based and now in short supply. The drop in world supplies of petroleum-based fertilizers is expected to cause a drop in crop yields of ten tons for each one ton decline in fertilizers applied.
This presents a particular problem for underdeveloped nations that often lack the foreign exchange necessary for buying fertilizer. The problem is so severe that Philip Handier, president of the National Academy of Sciences, has predicted one million child deaths per month in these nations by the year 2025.
It is expected that crop yields will drop, especially in underdeveloped countries mainly because of______.
选项
A、disastrous weather
B、weak strains
C、finance shortages
D、revolutions
答案
C
解析
本题考查考生对细节的理解。考的是粮食产量,尤其是不发达国家的粮食产量下降的主要原因。本题的答案在第六段。由第五段我们可以得知,石油性肥料的紧缺可能导致粮食产量下降。第六段告诉我们,这对不发达国家来说更是个问题,因为这些国家没有足够的外汇来购买肥料。所以正确答案是C(财政匮乏)。
转载请注明原文地址:https://kaotiyun.com/show/ybQd777K
本试题收录于:
职称英语理工类C级题库职称英语分类
0
职称英语理工类C级
职称英语
相关试题推荐
Whatdomedicalresearchersusuallyusetomakeplacebopills?Placebosmaybeharmful,becausetheymaybeusedby______.
NaturalHealthCareNaturalhealthcareisaphilosophyandasetofprinciplesandpracticesbasedonsciencethatleadtoane
MusicUsedAsaHealingTherapy1.Musichaslongbeenusedtotreatpatientssufferingfromdifferentproblems.In400BC,
EyeProblems1Oureyesareunderagreatdealofstrainthesedaysascomputerwork,televisionviewing,nightdriving,and
LudwigVanBeethovenLudwigVanBeethoven,amajorcomposerofthenineteenthcentury,overcamemanypersonalproblemstoac
LudwigVanBeethovenLudwigVanBeethoven,amajorcomposerofthenineteenthcentury,overcamemanypersonalproblemstoac
LudwigVanBeethovenLudwigVanBeethoven,amajorcomposerofthenineteenthcentury,overcamemanypersonalproblemstoac
Hegavemeabookofthesortusuallyreservedfornaughtyschoolchildren.
1.Medicineisthescienceandartofhealing.Itisasciencebecauseitisbasedonknowledgegainedthroughcarefulstudyand
Thestudyalsonotesasteadydeclineinthenumberofcollegestudentstakingsciencecourses.
随机试题
“专利申请人、专利权人在专利授权或者无效宣告程序中,通过对权利要求、说明书的修改或者通过意见陈述而放弃的技术方案,权利人在侵犯专利权纠纷案件中又将其纳入专利权保护范围的,人民法院不予支持。”以上内容所描述的是()。
王某,女,38岁。症见咽痒咳嗽、痰中带血3天余,伴有咽干鼻燥,身微热,舌红少津,苔薄黄,脉数。其首选方剂是
关于女性外生殖器的叙述,正确的是
某企业用长期资金来满足企业全部长期资产以及部分永久性流动资产.这种融资战略属于()。
下列关于美国内战历史意义的表述,不正确的是()。
周日下午,连里的通讯员到炊事班来,正巧碰见新来的小刘、小陈、小李,顺便问起了他们的年龄。小刘说:“我22岁,比小陈小2岁,比小李大1岁。”小陈说:“我不是年龄最小的,小李和我差3岁。小李是25岁。”小李说:“我比小刘年纪小,小刘23岁,小陈比小刘大3岁。”
某模拟网站的主页地址是HTTP://LOCALHOST:65531/ExamWeb/INDEX.HTM,打开此主页,浏览“航空知识”页面,查找“超七战斗机”的页面内容,并将它以文本文件的格式保存到考生目录下,命名为“chao7。txt”。
Theywouldknowthatinverycoldconditionswaterbecomesasolidcallediceandthatwhenheatingonafireitbecomesavapor
TreesTomany,thewordtreesevokesimagesofsuchancient,powerful,andmajesticstructuresastheredwoodandthegiant
Thegovernmentlaunchedacampaignto______thepublictothedangersofsmoking.
最新回复
(
0
)