首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Egypt Felled by Famine Even ancient Egypt’ s mighty pyramid builders were powerless in the face of the famine that helped br
Egypt Felled by Famine Even ancient Egypt’ s mighty pyramid builders were powerless in the face of the famine that helped br
admin
2014-05-13
29
问题
Egypt Felled by Famine
Even ancient Egypt’ s mighty pyramid builders were powerless in the face of the famine that helped bring down their civilization around 2180 BC. Now evidence gleaned(搜集)from mud deposited by the River Nile suggests that a shift in climate thousands of kilometers to the south was ultimately to blame—and the same or worse could happen today.
The ancient Egyptians depended on the Nile’ s annual floods to irrigate their crops. But any change in climate that pushed the African monsoons(季风)southwards out of Ethiopia would have diminished these floods.
Dwindling(使减少)rains in the Ethiopian highlands would have meant fewer plants to establish the soil. When rain did fall it would have washed large amounts of soil into the Blue Nile and into Egypt, along with sediment(沉积物)from the White Nile.
The Blue Nile mud has a different isotope(同位素)signature from that of the White Nile. So by analyzing isotope differences in mud deposited in the Nile Delta, Michael Krom of Leeds University worked out what proportion of sediment came from each branch of the river.
Krom reasons that during periods of drought, the amount of the Blue Nile mud in the river would be relatively high. He found that one of these periods, from 4, 500 to 4, 200 years ago, immediately predated the fall of the Egypt’ s old Kingdom.
The weakened waters would have been catastrophic for the Egyptians. " Changes that affect food supply don’ t have to be very large to have a ripple effect in societies, " says Bill Ryan of the Lamont Doherty Earth Observatory(天文台)in New York.
"Similar events today could be even more devastating, " says team member Daniel Stanley, a geoarchaeologist from the Smithsonian Institution in Washington, D. C. "Anything humans do to shift the climate belts would have an even worse effect along the Nile system because the populations have increased dramatically. "
Why does the author mention "pyramid builders"?
选项
A、Because they once worked miracles.
B、Because they were well-built.
C、Because they were actually very weak.
D、Because even they were unable to rescue their civilization.
答案
D
解析
第一段第一句表明,公元前2180年的饥荒使古埃及文明衰落,即使古埃及伟大的金字塔的建造者面对那场饥荒也无能为力。由此可知,作者提到金字塔的建造者,是为了表明即使是他们也无法拯救古埃及文明的衰落,故选D项。
转载请注明原文地址:https://kaotiyun.com/show/FdQd777K
本试题收录于:
职称英语理工类B级题库职称英语分类
0
职称英语理工类B级
职称英语
相关试题推荐
Parkinson’sDisease1.Parkinson’sdiseaseaffectsthewayyoumove.Ithappenswhenthereisaproblemwithcertainnervec
TeachingandLearningMedicineAwardTwoscientistswhohavewonpraiseforresearchintothegrowthofcancercellscouldb
A.imaginativelyB.recentlyC.carefullyD.unscientificallyE.accidentallyF.satisfactorilyInancienttimes,rainmakerstri
NewU.S.PlanforDiseasePreventionUrgingAmericanstotakeresponsibilityfortheirhealth,HealthandHumanServicesSe
Hewasacquittedonchargesofassaultwithadeadlyweapon.
ChestCompressions:MostImportantofCPRCardiopulmonaryresuscitation,orCPR,cansavethelifeofsomeonewhoseheartha
Themanagergotangryjustbecausehissecretarywastenminuteslate.
Sleepproblemscanseriouslyaffectone’squalityoflife.ThenumberofolderAmericanswithsleepproblemsisnotsmall.
LookingtotheFutureWhenamagazineforhigh-schoolstudentsaskeditsreaderswhatlifewouldbelikeintwentyyears,the
MediaandCurrentEventsThemediacanimpactcurrentevents.AsagraduatestudentatBerkeleyinthe1960s,Iremembere
随机试题
HDLC是面向()的数据链路控制规程。
何谓腹膜内位器官?
患者,男,20岁。多发性疖肿,红、肿、热、痛,部分溃破流出黄脓,发热口渴,大便干结,小便短赤,舌苔薄黄,脉数。治疗应首选
等比累进还款法,通常比例控制在0~100%之间,且经计算后的任意一期还款计划中的本金或利息不得小于()。
在对消费者行为进行分析的过程中,对消费者偏好做出的假定不包括()。
与启发性原则在教学中贯彻要求不符的是()。
阐述革命根据地和解放区教育体制的构成特点及作用。
设函数f(u)可导,y=f(x2)当自变量x=-1处取得增量△x=-0.1时,相应的函数增量△y的线性主部为0.1,则f’(1)=_________.
(2017年)求
多线程是Java程序的【】机制,它能同步共享数据、处理不同事件。
最新回复
(
0
)