首页
登录
职称英语
共用题干 第二篇Ancient Egypt Brought Down by F
共用题干 第二篇Ancient Egypt Brought Down by F
练习题库
2022-08-02
32
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."According to Krom,the Egypt's Old Kingdom fellA:immediately after a period of drought.B:immediately after a period of flood.C:just before a drought struck.D:just before a flood struck.
选项
According to Krom,the Egypt's Old Kingdom fell
A:immediately after a period of drought.
B:immediately after a period of flood.
C:just before a drought struck.
D:just before a flood struck.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/1501615.html
本试题收录于:
综合B题库综合类分类
综合B
综合类
相关试题推荐
共用题干 廖某委托甲房地产经纪机构(以下称甲机构)寻找房源,并签订了房地产经纪
共用题干 廖某委托甲房地产经纪机构(以下称甲机构)寻找房源,并签订了房地产经纪
共用题干 廖某委托甲房地产经纪机构(以下称甲机构)寻找房源,并签订了房地产经纪
共用题干 张某委托甲房地产经纪机构(以下称甲机构)为其寻找一套房子。经过反复比
共用题干 张某委托甲房地产经纪机构(以下称甲机构)为其寻找一套房子。经过反复比
共用题干 甲房地产经纪机构(以下称甲机构)是个人独资的房地产经纪机构。张某和王
共用题干 甲房地产经纪机构(以下称甲机构)是个人独资的房地产经纪机构。张某和王
共用题干 甲房地产经纪机构(以下称甲机构)是个人独资的房地产经纪机构。张某和王
共用题干 张某为甲合伙制房地产经纪机构(以下称甲机构)的注册房地产经纪人。王某
共用题干 张某为甲合伙制房地产经纪机构(以下称甲机构)的注册房地产经纪人。王某
随机试题
EarnYourParent’sTrust1.【T1】______ofprivilegesthatyouwant
GeneticallyModifiedFoods—FeedtheWorld?Ifyouwanttosp
[originaltext]TheheadoftheUScentralbankhastoldCongressthattheec
Recently,astudentusedhisPersonalDigitalAssistant(PDA)tofilmafema
Toerrishumanandtoforgivedivine,accordingtotheoldadage.Humanswh
叩诊出现鼓音的是()。A.胸腔积气 B.胸腔积液 C.肺气肿 D.肺实变
左边给定的是多面体的外表面,右边哪一项能由它折叠而成?请把它找出来。 A.如上
在证券经纪业务中,包含的要素有()。 A.股票和债券的发行人B.证券交易对
申请个人住房贷款时,可提供的合法有效身份证件有()。A.居留证件 B.居民身
通知存款是指客户在存入款项时不约定存期,支取时需提前通知商业银行的存款。目前,银
最新回复
(
0
)