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
33
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
Theoldman______sonisafamousscientistneverreceivedanyeducation.A、what
SecretsofGrade-AParentsA)WhenCareyGrahamstartedGradeOne,hego
ThefirststatetoratifytheConstitutionoftheUnitedStatesisA、Delaware.B、
TheGermanfootballauthoritieswilluseanewresortvillageinBrazilastheir
[originaltext]W:Iwasworkingonapaperaboutthedifferencesbetweenwomena
Theyjustboughtanewhouselastweekandwillhaveit______nextweek.A、done
按照《证券监督管理条例》的要求,证券公司有以下( )情形时,独立董事人数不得少
适宜在夏末秋初时期采收的中药材是A.根和根茎类药材 B.茎木类药材 C.叶类
尿蛋白加热醋酸法试验中结果呈明显白色颗粒状浑浊、无絮状沉淀,应报告为A.++++
能与宿主组织细胞表面受体结合的细菌结构是A、鞭毛 B、芽胞 C、菌毛 D、
最新回复
(
0
)