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
41
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.
The expected world population will reach ______ in 25 years.
选项
A、2, 000, 000, 000
B、4, 000, 000, 000
C、6, 000, 000, 000
D、8, 000, 000, 000
答案
D
解析
本题考查考生对数字细节的把握,考的是25年以后世界人口将达到多少。本题的线索在第二段第二句话The world’s population is now almost four billion and expected to double in twenty five years. 这句话的意思是,目前世界人口为40亿,预计25年之后会增长1倍,也就是说,25年之后,世界人口增至80亿。所以正确答案是D。
转载请注明原文地址:https://kaotiyun.com/show/ubQd777K
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
CollegeNightOwlsHaveLowerGrades Collegestudentswhoaremorningpeopletendtogetbettergradesthanthosewhoarenig
MusicUsedAsaHealingTherapy1.Musichaslongbeenusedtotreatpatientssufferingfromdifferentproblems.In400BC,
EyeProblems1Oureyesareunderagreatdealofstrainthesedaysascomputerwork,televisionviewing,nightdriving,and
Thenewservicehelpedboostpre-taxprofitsby10%.
wewilltryourbesttosolvetheresidualproblems.
Thepoliticalsituationintheregionhasdeterioratedrapidly.
LudwigVanBeethovenLudwigVanBeethoven,amajorcomposerofthenineteenthcentury,overcamemanypersonalproblemstoac
LudwigVanBeethovenLudwigVanBeethoven,amajorcomposerofthenineteenthcentury,overcamemanypersonalproblemstoac
CoveringtheCostAllbyHimselfUniversitylifeisinnowaycheapinCanada.ItcostsPeterKemp,acomputersciencemajor
随机试题
下列汉字中,属于形声字的是()。
艺术创作的四个心理要素是【】
由于喜欢某人、某群体或某件事,乐于与其保持一致或采取与其相同的表现,这是态度形成过程中的哪一个阶段?()
下列有关温度与显影性能的说法,错误的是
银行汇票丧失,可以由失票人通知付款人或者代理付款人挂失止付。()
“我们要办一种适合儿童的教育,而不是挑选适合教育的儿童”,这反映了素质教育是一种()的教育。
“有志者、事竟成,破釜沉舟,百二秦关终属楚;苦心人、天不负,卧薪尝胆,三千越甲可吞吴。”此联所涉及的历史事件分别发生在()。
“五十六个星座,五十六枝花,五十六族兄弟姐妹是一家”,这首歌家喻户晓,广为传唱,歌颂了我国平等、团结、互助的社会主义新型民族关系。民族区域自治是我国确保新型民族关系的基本政治制度。在这种制度下,各自治机关()①是自治地方的权力机关
下列关于中国古代契约的规定,正确的有()。
北洋政府制定的刑法典是()。
最新回复
(
0
)