首页
登录
职称英语
In 1798 the political economist Malthus predicted that in time mankind would
In 1798 the political economist Malthus predicted that in time mankind would
游客
2025-03-24
11
管理
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. [br] 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://tihaiku.com/zcyy/4011000.html
相关试题推荐
Itshowshoweconomicandsocialand,aboveall,politicalchangeshaveplayedt
In1798thepoliticaleconomistMalthuspredictedthatintimemankindwould
In1798thepoliticaleconomistMalthuspredictedthatintimemankindwould
Politically,thenationsoftheworldwillbecomemoretightlyintegratedbe
Politically,thenationsoftheworldwillbecomemoretightlyintegratedbe
Politically,thenationsoftheworldwillbecomemoretightlyintegratedbe
Politically,thenationsoftheworldwillbecomemoretightlyintegratedbe
Theforecastpredicted______weatherswithsnow,sunshine,windandthunderandt
Itshowshoweconomicandsocialand,aboveall,politicalchangeshaveplayedt
Politically,thenationsoftheworldwillbecomemoretightlyintegratedbe
随机试题
我们的生活离不开音乐。音乐的特殊之处在于它不分国界。任何一种乐器,不论是小提琴还是钢琴,都是自我娱乐的良好手段。而且,早期接触音乐有助于儿童的智力发育。小
马丁特罗提出:一个国家的高等教育毛入学率介于()至50%之间时,处于大众化的高
据报道幼儿的早期教育越来越引起人们的重视。其中,幼儿学外语成为人们最为关注的热点
有限合伙框架下,直接通过合伙协议,约定由某个自然人或若干自然人以执行事务合伙人名
下列属于经济指标中的同步性指标的包括( )。 ①利率水平 ②国内生产总值
张女士今年30岁,计划5年后购买一套80平方米的普通住宅,预计房屋市价90万元。
从儿童心理发展的特征看,小学生记忆的主要方式是( )。A、符号记忆 B、抽象
小学英语课堂唱英语歌,应要求() A.曲调正确B.结合学生生活 C.唱得
根据沙赫特的情绪理论,决定情绪的因素包括()。 (A)自我意识(B)认知标
申请从事民用爆炸物品销售的企业,应当向所在地省、自治区、直辖市人民政府国防科技
最新回复
(
0
)