首页
登录
职称英语
Thomas Malthus published his Essay on the Principle of Populationalmost 200 yea
Thomas Malthus published his Essay on the Principle of Populationalmost 200 yea
游客
2023-10-14
28
管理
问题
Thomas Malthus published his Essay on the Principle of Population
almost 200 years ago.Ever since then, forecasters have being warning【M1】_________
that worldwide famine was just around the next comer.The fast-growing
population’ s demand for food, they warned, would soon exceed their【M2】_________
supply, leading to widespread food shortages and starvation.
But in reality, the world’s total grain harvest has risen steadily over the
years.Except for relative isolated trouble spots like present-day Somalia,【M3】_________
and occasional years of poor harvests, the world’s food crisis has remained【M4】_________
just around the comer.Most experts believe this can continue even as if【M5】_________
the population doubles by the mid-21st century, although feeding 10 billion
people will not be easy for politics, economic and environmental reasons.【M6】_________
Optimists point to concrete examples of continued improvements in yield.
In Africa, by instance, improved seeds, more fertilizers and advanced【M7】_________
growing practices have more than double com and wheat yields in an【M8】_________
experiment.Elsewhere, rice experts in the Philippines are producing
a plant with few stems and more seeds.There is no guarantee that plant【M9】_________
breeders can continue to develop new, higher-yielding crop, but most【M10】_________
researchers see their success to date as reason for hope. [br] 【M7】
选项
答案
by→for
解析
该句的意思是“例如,在非洲,在一项试验中,改良种子、更多化肥和先进的种植方法使玉米和小麦产量增加了一倍以上”。for instance为固定用法,表示“例如”。因此将by改为for。
转载请注明原文地址:https://tihaiku.com/zcyy/3097592.html
相关试题推荐
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
随机试题
Wecan’tdoanymorenow.Let’scallita______.A、dayB、haltC、stopD、nightAc
Ourbodiesexperienceanebbandflowofenergythroughouttheday.Thisis
CreativeDestructionofHigherEducationA)Highereducation
干粉灭火系统喷头的检查不正确的是()。A.检查喷嘴安装位置和方向是否正确 B
卫生经济政策分析的第一维是()A.基本范畴 B.基本内容 C.基本
羊水栓塞发生的原因是A.胎粪污染的羊水中的有形成分进入母体血液循环 B.胎儿血
房地产贷款是指与房产或地产开发经营活动有关的贷款,按照开发内容的不同,可分为(
按照有关规定,投资者适当性管理工作主要是以经营机构适当性义务为主线展开的,不包括
2020年12月16日至18日中央经济工作会议在北京举行。习近平总书记在会上发表
2012年11月29日,习近平总书记率中央政治局常委和中央书记处的同志来到国家博
最新回复
(
0
)