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
2024-08-09
56
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:http://tihaiku.com/zcyy/3712210.html
相关试题推荐
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200yea
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200yea
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200yea
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200yea
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200yea
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
随机试题
Writeapassageabout150wordsonthefollowingtopic.
Istestanxietydestructive?Canwemaketestanxietyworkforus?Theanswe
Theneedforsolarelectricityisclear.Itissafe,ecologicallysound,eff
He____________(为了谎话而内疚),sohewenttoapologizetoher.wasguiltyabout/forhav
说明:假定你是公司职员李明,给你的部门经理Sam写一张请假条。时间:3月19日1.最近经常感到头疼,想请假一天去医院做检查;2.本周工作已基本完成;3.
《出版管理条例》规定,境外委托印刷或者复制的出版物的内容,应当经( )审核。A
脑部的血液供应来自两个动脉系统,即___________动脉系统和椎-基底动脉系
现金流量图有其习惯的表式方法,主要表现在()。A:用一水平线表示时间,将该水平
地西泮的代谢产物包括A.劳拉西泮B.氟西泮C.去甲地西泮和硝西泮D.硝西泮和奥沙
对写字楼在建工程进行估价,适用的估价方法有()。A、市场法 B、成本法 C、
最新回复
(
0
)