首页
财务会计
医药卫生
金融经济
考公考编
外语考试
学历提升
职称考试
建筑工程
IT考试
其他
登录
职称考试
共用题干 第二篇Ancient Egypt Brought Down by FamineEven ancient Egypt's mighty pyr...
共用题干 第二篇Ancient Egypt Brought Down by FamineEven ancient Egypt's mighty pyr...
admin
2020-12-24
43
问题
共用题干
第二篇
Ancient Egypt Brought Down by Famine
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 BC.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一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."
选项
Why does the author mention"Egypt's mighty pyramid builders"?
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
转载请注明原文地址:https://ti.zuoweng.com/ti/fodQKKKQ
相关试题推荐
共用题干 郑先生及郑女士夫妇每月税后收入8000元,各种生活开支4000元。2008年3月二人等额本息法贷款购买了房屋一套,首付10万元,贷款40万元,...
共用题干 郑先生及郑女士夫妇每月税后收入8000元,各种生活开支4000元。2008年3月二人等额本息法贷款购买了房屋一套,首付10万元,贷款40万元,...
共用题干 杨女士2001年与吴先生结婚,生一子小吴,婚后二人购买了一套两居室的房屋居住,2003年吴先生用家庭财产20万元与朋友合伙成立了一家股份公司,...
共用题干 杨女士2001年与吴先生结婚,生一子小吴,婚后二人购买了一套两居室的房屋居住,2003年吴先生用家庭财产20万元与朋友合伙成立了一家股份公司,...
共用题干 杨女士2001年与吴先生结婚,生一子小吴,婚后二人购买了一套两居室的房屋居住,2003年吴先生用家庭财产20万元与朋友合伙成立了一家股份公司,...
共用题干 杨女士2001年与吴先生结婚,生一子小吴,婚后二人购买了一套两居室的房屋居住,2003年吴先生用家庭财产20万元与朋友合伙成立了一家股份公司,...
共用题干 张岚作为理财规划师,打算为客户构建一个有股票和债券的投资组合,这两种资产的预期收益率分别是每年10%和5%,预期收益的标准分别是每年20%和1...
共用题干 老耿和妻子老谢今年都50岁了,两人在事业单位上班,每月税后工资老耿为3000元,老谢为2000元,目前家里有40万元的债券型基金,二人居住的房...
共用题干 老耿和妻子老谢今年都50岁了,两人在事业单位上班,每月税后工资老耿为3000元,老谢为2000元,目前家里有40万元的债券型基金,二人居住的房...
共用题干 老耿和妻子老谢今年都50岁了,两人在事业单位上班,每月税后工资老耿为3000元,老谢为2000元,目前家里有40万元的债券型基金,二人居住的房...
随机试题
正常人的LES静息压是
“即使没有整套民商事法律,世界上的买卖活动也绝不会停息一刻;即使没有整套婚姻家庭
关于测绘仪器设备保管的说法,错误的是()
简述劳动争议仲裁在申请与受理阶段的主要工作内容和相关规定。[2013年5月二级
在我国基金募集申请监管的实践中,募集申请的核准由()负责。
2009-161.治疗劳伤心脾之遗精可选的方剂是 A.三才封髓丹B.妙香散
患者男性,31岁,患重度二尖瓣狭窄,此患者有可能出现的最严重的并发症是A.急性肺水肿B.心房颤动C.感染性心内膜炎D.右心衰竭E.血栓栓塞
承受相同荷载条件下,相对刚性基础而言柔性基础的特点是()。A.节约基础挖方量B.节约基础钢筋用量C.增加基础钢筋用量D.减小基础埋深E.增加基础埋深
QDII是()的首字母缩写。A.合格境内机构投资者B.合格境外机构投资者C.境内机构投资者D.境外机构投资者
某地计划开展测绘航空摄影工作,下列内容中,与项目经费预算无关的是()A:航摄区域地理位置与范围B:航摄资料用途及成图比例尺C:航摄单位资质等级D:航摄比例