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
外语
Egypt Felled by Famine Even ancient Egypts mighty pyramid builders were powerless in the face of the famine that helped bring
Egypt Felled by Famine Even ancient Egypts mighty pyramid builders were powerless in the face of the famine that helped bring
admin
2011-01-01
30
问题
Egypt Felled by Famine
Even ancient Egypts mighty pyramid builders were powerless in the face of the famine that helped bring down their civilian around 2180 BC. Now evidence gleaned(搜集) from mud deposited by the River Nile suggests that a shift in climate thousands of kilometers to the south was ultimately to blem — and the same or worse could happen today.
The ancient Egyptians depended on the Niles annual floods to irrigate their crops. But any change in climate that pushed the African monsoons(季风) southwards out of Ethiopia would have diminished these floods.
Dwindling(逐渐变少;使变小) rains in the Ethiopian highlands would have meant fewer plants to establish 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,沉积物) from the White Nile. The Blue Nile mud has a different isotope signature(名;特征) from that of the White Nile. So by analyzing isotope(同位素;核素) differences in mud deposited in the Nile Delta, Michael Krom of Leads University worked out what proportion of sediment Came from each branch of the river.
Krom reasons that during periods of drought, the amount of the Blue Nile mud in the river would be relatively high. He found that one of these periods, from 4,500 to 4,200 years ago, immediately predates the fall of the Egypts Old Kingdom.
The weakened waters would have been catastrophic for the Egyptians. Changes that affect food supply don’t have to be very large to have a ripple effect in societies, says Bill Ryan of the Lamont Doherty Earth Observatory(天文台) in New York.
Similar events today could be even more devastating, says team member Daniel Stanley, a geoarchaeologist (地质考古学家) 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 because the populations have increased dramatically.
Which of the following statements is true?
选项
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 and the Blue Nile are branches of the River Nile.
答案
D
解析
题意:下列陈述哪一种是正确的?青尼罗河和白尼罗河是尼罗河的支流。第四段最后一句话提到了“青尼罗河的泥浆与白尼罗河的泥浆的同位素不同。通过分析尼罗河三角洲的泥浆的同位素差别,利兹大学的迈克尔·克罗姆算出了来自每个支流的沉淀物的比例”,由此可推断出青尼罗河和白尼罗河是尼罗河的支流,故选D。
转载请注明原文地址:https://jikaoti.com/ti/8wmsFFFM
本试题收录于:
职称英语综合类B级题库职称英语分类
0
职称英语综合类B级
职称英语
相关试题推荐
AalotofmoneyBBritishpeopleCmorningDlocalpeopleEnationalissuesFlocalissuesManylocalnewspapersinBritainar
AalotofmoneyBBritishpeopleCmorningDlocalpeopleEnationalissuesFlocalissuesBritishpeoplehavethehabitofre
A.GoodresultsB.AnancientskillC.GainingattentionD.MemorytricksE.AlectureonmemorytechniquesF.Waystoimpr
A.GoodresultsB.AnancientskillC.GainingattentionD.MemorytricksE.AlectureonmemorytechniquesF.Waystoimpr
Hearingproblemsmaybealleviatedbychangesindietandexercisehabits.
Sinceabout1970,newresearchhashelpedbrainscientistsunderstandstheseproblemsbetter.Scientistsnowknowtherearemany
Saltspreadonroadinwintermaycauseallthefollowingproblemsexcept______.Accordingtotheauthor,whencanCMAbeappl
TheBuildingofthePyramidsTheoldeststonebuildingsintheworldarethepyramids.(46).Thereareovereightyofthemscat
TheBuildingofthePyramidsTheoldeststonebuildingsintheworldarethepyramids.(46).Thereareovereightyofthemscat
随机试题
下列对目标管理的评价,不正确的是
采用网络计划对工程进度实施动态控制是控制建设工程进度的( )。
在签订审计业务约定书之前,注册会计师应初步了解的被审计单位的基本情况不包括()。
下列各项中,属于运用横向比较较法的有()。Ⅰ.将甲公司去年与今年的销售额进行比较Ⅱ.将美国和中国的医药行业进行比较Ⅲ.将教育培训和图书行业进行比较Ⅳ.将医药行业的增长情况与国民经济的增长进行比较
某市摩托车制造有限公司(增值税一般纳税人),从事摩托车的研发、生产销售。2013年3月发生经营业务如下:(1)研究开发过程中购进科研设备,取得增值税专用发票,注明价款8万元、增值税1.36万元;从国内购进生产用原材料一批,取得防伪税控系统开具的增值税
某首饰制造企业(增值税一般纳税人),主要生产加工并零售金银首饰、钻石饰品和其他非金银首饰,2017年2月发生以下业务:(1)销售玉石首饰取得不含税收入129.8万元,镀金首饰不含税收入28万元。(2)采取以旧换新方式向消费者销售金项链1批,旧项链抵顶1
社会工作的基本对象有()。
教学过程是根据()实施教学的一种活动程序,由教师、学生以及教学内容、方法和手段等若干要素构成。
有三个关系R、S和T如下:则由关系R和S得到关系T的操作是( )。
WhatisNOTtrueaboutvisualstereotypes?Clickon2answers.
最新回复
(
0
)