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
37
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
Which of the following statements is true?
A:The White Nile is the trunk of the River Nile.
B:The White Nile is the trunk of the Blue Nile.
C:The White Nile is a branch of the Blue Nile.
D:The White Nile is a branch of the River Nile.
答案
D
解析
转载请注明原文地址:https://ti.zuoweng.com/ti/eNdQKKKQ
相关试题推荐
共用题干 资料:王太太从事个体服装销售近20年,前一段时间,她刚参加了国家的社会养老保险,但是她对国家举办的国家社会养老保险不是很明白;于是她向理财规划...
共用题干 资料:王太太从事个体服装销售近20年,前一段时间,她刚参加了国家的社会养老保险,但是她对国家举办的国家社会养老保险不是很明白;于是她向理财规划...
共用题干 资料:王太太从事个体服装销售近20年,前一段时间,她刚参加了国家的社会养老保险,但是她对国家举办的国家社会养老保险不是很明白;于是她向理财规划...
共用题干 袁先生与李女士刚刚结婚,组建家庭。其中,袁先生,28岁,每年的年收入为5万元;李女士,28岁,每年的年收入为3万元,每月还可以获得投资收入50...
共用题干 袁先生与李女士刚刚结婚,组建家庭。其中,袁先生,28岁,每年的年收入为5万元;李女士,28岁,每年的年收入为3万元,每月还可以获得投资收入50...
共用题干 夏某夫妇计划于明年生育一个宝宝,请理财规划师为其调整家庭的风险管理和保险规划。根据案例回答6~9题。夏某夫妇非常关心孩子的教育问题,尤其是高等教育,
共用题干 夏某夫妇计划于明年生育一个宝宝,请理财规划师为其调整家庭的风险管理和保险规划。根据案例回答6~9题。夏某夫妇的孩子平安出生后,在活泼好动的中小学阶段
共用题干 龚建柱是某中学教师,30岁,每月税后收入4000元,年终奖金10000元;龚太太是某公司文秘,25岁,每月税后收入3000元。(1)家庭资产负...
共用题干 龚建柱是某中学教师,30岁,每月税后收入4000元,年终奖金10000元;龚太太是某公司文秘,25岁,每月税后收入3000元。(1)家庭资产负...
共用题干 唐先生夫妇都是国有企业中层管理人员,二人均为45岁,家庭年收入总额为税后300000元。他们有一个刚上大学的儿子,生活已经基本独立。家中具有银...
随机试题
机械通气时,为预防气压伤应注意 A.吸气压 B.呼吸频率 C.二氧化碳分压
(2017年)下面关于全面预算的表述中,错误的是( )。
勘察单位提供的地质、测量、水文等勘察成果必须()。
患者近一周来,出现吞咽之时哽噎不顺,不能进食固体食物,食入即吐,伴有胸膈痞塞满闷
关于个体身心发展的动因有几种不同的观点:内发论、外铄论、{}。
蛇咬伤中毒采用对症支持治疗时忌用()。A、吗啡B、高锰酸钾溶液C、过氧化氢D、氯丙嗪E、巴比妥类
劳动安全卫生制度对用人单位提出严格要求,但不包括()。A.执行国家劳动安全卫生规程和标准B.为劳动者办理意外伤害保险C.对劳动者进行劳动安全卫生教育D.对
共用题干 GK公司是经营空调的大型企业,与上下游企业间的纵向联系及各类专业服务企业联系紧密,并形成了供应链。该公司2010年投入1000万元用于信息系统...
根据最新的国务院及有关部门文件规定,如因当地暂不具备査询条件而不能提供家庭住房实际査询结果的,借款人应向贷款人提交家庭住房实有套数的_______,如借款...
下列说法中,不符合房产税有关规定的是( )。A、房产税以在征税范围内的房屋产权所有人为纳税人B、产权出典的,由承典人纳税C、纳税单位无租使用免税单位的房产,