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
考研
Even ancient Egypt’s mighty pyramid (金字塔) builders were powerless in the face of the famine (饥荒) that helped bring down their ci
Even ancient Egypt’s mighty pyramid (金字塔) builders were powerless in the face of the famine (饥荒) that helped bring down their ci
admin
2012-08-24
61
问题
Even ancient Egypt’s mighty pyramid (金字塔) builders were powerless in the face of the famine (饥荒) that helped bring down their civilization around 2180 B. C. Now evidence collected 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 reduced these floods.
Declining rains in the Ethiopian highlands would have meant fewer plants to stabilize 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) from the White Nile.
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 Blue Nile mud in the river would be relatively high. He found that one of these periods, from 4500 to 4200 years ago. immediately came before the fall of the Egypt’s old Kingdom.
The weakened waters would have been disaster for the Egyptians. "Changes that affect food supply don’t have to be very large to have a ripple (波浪) effect in societies," says Bill Ryan of the Lamont Doherty Earth Observatory in New York.
Similar events today could be even more devastating, says team member Daniel Stanley. A scientist 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 today because the populations have increased dramatically."
Why does the author mention "Egypt’s mighty 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
文章开头的意思是:即使古埃及伟大的金字塔建筑者面对那场在公元前2180年促使他们文明毁灭的饥荒也无能为力。D说的是:即使是他们也不能挽救他们的文明。因此D是正确的答案。故答案为D。
转载请注明原文地址:https://kaotiyun.com/show/cbhi777K
0
在职申硕(同等学力)英语
相关试题推荐
Musiccomesinmanyforms;mostcountrieshaveastyleoftheirown.【C1】______theturnofthecenturywhenjazz(爵士乐)wasborn,Am
Thesentence"mostofthebestthingshavealreadybeenlocated"couldmean______.Theterm"theBigBang"probablyrefersto__
Computerstodayarecapableof______Accordingtothepassage,whichofthefollowingstatementsisNOTtrue?
Amajorgoalofthestatetravelagencyisto______morepeopletovisititscountryattheturnofthecentury.
Factorsleadingtothecrisisincludedpoorregulation,mismanagementanddeceptionintheindustry,andcompetitionfromother
Unemploymentseemstobethe______socialprobleminthisareaandmayunderminesocialstability.
ThenumberofpermanentcrewontheInternationalSpaceStationwillbeincreased,andpossiblydoubled,from2006byproviding
Inflationisaperiodofrapidrisesinprices.Whenyourmoneybuysfewergoodssothatyouget【C1】______forthesameamount
Mrs.Jamesisseekingadivorcefromherhusband,forshecannolonger______hisstormytemper.
Thiscollegegraduatetriedourcompanyathirdtime,______tobeturneddownagain.
随机试题
驾驶员侧的门控制单元通过LIN数据总线将门锁指令传递给其他控制单元。()
脓性指头炎切开引流的指征是()
如工程的施工进度能保证在洪水来临前具备挡洪条件,则其施工导流时段为()。
以下不属于喷锚暗挖法施工准备阶段安全技术管理要求的是()。
气体灭火系统在施工安装前,应按照施工过程质量控制要求,对系统组件、管件及其他设备、材料进行现场检查(检验),不合格的组件、管件、设备、材料不得使用。下列关于系统组件外观检查的说法不正确的是()。
外国驻华使馆、领事馆和国际组织驻华机构及其外交人员自用的物品,无需办理强制性产品认证。( )
连带责任保证中,主债务诉讼时效中断,保证债务诉讼时效也中断。()
甲上市公司具备健全且运行良好的组织机构,自股票上市以来连续盈利,每年向股东支付股利,且最近3年财务会计文件无虚假记载,也没有其他重大违法行为。2011年4月,甲公司拟增发新股,并决定选择乙证券公司作为甲公司增发新股的承销商承担承销业务。甲公司向乙
处理员工与领导之间关系的正确态度是()。
IPv6的地址为______。
最新回复
(
0
)