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
18
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
某80m3金属储罐防静电的接地要求错误的是()。
商业银行应为合规管理部门配备有效履行合规管理职能的资源。合规管理人员应具备与履行
某实施监理的工程,建设单位分别与甲、乙施工单位签订了土建工程施工合同和设备安装工
关于屋面防水工程的做法,正确的有()
下列()不属于财政政策工具。
代理报检单位应到少有()名经检验检疫机构考试合格并取得〈报检员资格证〉的人员。
证券承销的方式有()。 Ⅰ.代销Ⅱ.包销 Ⅲ.助销Ⅳ.直销A.Ⅰ、Ⅱ、ⅣB.Ⅰ、Ⅱ、Ⅲ、ⅣC.Ⅰ、Ⅱ、ⅢD.Ⅰ、Ⅲ、Ⅳ
办理申请用电手续时要签订协议或合同,规定供电和用电双方的权利和义务,用户有保护供电设施不受危害,确保用电安全的义务,同时还应明确双方的( )界限。A.用电时间
在市场法的步骤中,将可比实例的实际而可能是不正常的价格修正为正常市场价格的过程称为( )。A.交易情况修正B.市场状况调整C.房地产状况调整D.统一付款
企业常用的收款凭证、付款凭证和转账凭证均属于______。A.单式记账凭证B.复式记账凭证C.一次凭证D.通用凭证