首页
登录
职称英语
Thomas Malthus published his Essay on the Principle of Populationalmost 200
Thomas Malthus published his Essay on the Principle of Populationalmost 200
游客
2024-08-09
44
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一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/3712844.html
相关试题推荐
What’stheaimofthemessagepublishedinnewspapers?[originaltext]Thepandemi
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
ThomasMalthuspublishedhisEssayonthePrincipleofPopulationalmost200
随机试题
下列选项中,关于2020年1—2月份我国房屋施工、新开工、竣工面积中商业营
双侧弥漫性肺气肿的X线表现描述错误的是A.桶状胸 B.纵隔变为狭长 C.肺大
弥散性血管内凝血(DIC)早期高凝状态的表现是A.出血 B.抽血时血液不易抽出
患者女性,26岁,病史不清,因昏迷不醒、抽搐就诊。查体:呼吸困难、皮肤湿冷、瞳孔
1998-45.九味羌活汤的功用是 A.发汗散寒,宣肺平喘B.发汗解表,清热
HAMA与HAMD相比较,重复的项目有()。 (A)躯体性焦虑(B)抑郁
与牙周组织破坏关系最为密切的菌斑是A.成熟的龈上菌斑 B.不成熟的龈上菌斑
厌恶风险的投资者偏好确定的股利收益,而不愿将收益留存在公司内部去承担未来的投资风
柔性管道工程施工质量控制的关键是()。A.管道接口 B.管道基础 C.
在建设工程设计阶段,工程安全环保设施费用、安全施工和环境保护措施费用应在()中明
最新回复
(
0
)