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
2025-03-21
19
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] "Erosion" in the last sentence of the second paragraph probably means______.
选项
A、washing away
B、taking away
C、digging up
D、picking up
答案
A
解析
本题是一道词汇含义题。问第二段最后一句话中的词汇erosion是什么意思。文章第二段指出,到本世纪(20世纪)末,地球上的人口将超过50亿,比现在人口增长一半。为了保持与人口增长一致的速度,世界各国的农民必须加速提高粮食产量,增长率至少是每年2%。尽管用现代机械化耕种和大范围使用化肥,这种增长率至今为止在任何用传统的农业种植方法的国家里尚未出现。而且已经没有大面积可作为农业耕地的土地,而好的肥沃的耕地也在不断地被用做工业用地。另外,土壤的流失也不断带来损失。这里erosion指“流失”。因此,本题的正确答案应是A。
转载请注明原文地址:https://tihaiku.com/zcyy/4007023.html
相关试题推荐
In1798thepoliticaleconomistMalthuspredictedthatintimemankindwould
In1798thepoliticaleconomistMalthuspredictedthatintimemankindwould
Mankind’sfascinationwithgoldisasoldascivilizationitself.Theancien
Mankind’sfascinationwithgoldisasoldascivilizationitself.Theancien
Mankindmustfirstofalleat,drink,haveshelterandclothing______itcanpur
Mankind’sfascinationwithgoldisasoldascivilizationitself.Theancien
Mankind’sfascinationwithgoldisasoldascivilizationitself.Theancien
Mankind’sfascinationwithgoldisasoldascivilizationitself.Theancien
Themayorisawomanwithgreatintegrityandtherefore______ourpoliticaland
Itwouldbedifficultforamanofhispoliticalaffiliation,______,tobecome
随机试题
Itisnotoftenrealizedthatwomen【C1】______ahighplaceinsouthernEurope
Asmallpathwas______byloworangelampsconcealedintheflowerbeds.A、lubri
YourPasswordorYourP
【B1】[br]【B9】A、enduringB、encounteringC、retainingD、experiencingD语义衔接题。D.expe
根据著作权法的规定,著作权人享有的复制权等财产权可通过以下哪几项方式行使?(
C
施工过程的目标管理,不包括()。A、目标的确定与分解B、施工目标的实施管理C
提出一个问题往往比解决一个问题更重要,因为解决问题也许是一个数学上或实验上的技能
如果注册会计师与治理层之间的双向沟通不充分,并且这种情况得不到解决,下列措施中,
外科治疗胃十二指肠溃疡的目的是() A.防止恶变 B.防止出血 C.消除溃
最新回复
(
0
)