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
When were the first x-rays discovered?
When were the first x-rays discovered?
admin
2019-05-09
53
问题
When were the first x-rays discovered?
Karl Wilhelm Rontgen(1845 - 1923) astounded people with the first x-rays in 1895: this was followed three years later by the discovery of radium by Pierre and Marie Curie. But who were they? In 1894, Marie and Pierre Curie met while studying in Paris. Their marriage on 25 th July 1895 marked the start of a partnership which was to receive worldwide recognition.
The Curies discovered radium, a radioactive substance , in uranium oxide ore. They developed techniques for extracting it, but first did not fully understand its properties. Pierre Curie used to carry radium around in his waistcoat pocket and could not understand why he was developing a massive sore on his chest. This would have been fatal, but Pierre’ s life was cut short in 1906 when he was knocked down and killed by a horse and cart in the street. From then on, Marie devoted herself to completing the work that they had begun together.
Marie and Pierre Curie were awarded a joint Nobel Prize in 1904, followed up by a second one for Marie in 1911. Their research was crucial in the development of x-rays in surgery. During World War I Marie Curie helped to equip ambulances, which she drove to the front lines, with x-ray equipment. The International Red Cross made her head of its Radiological Service and she held training courses for medical orderlies and doctors in the new techniques.
Despite her success, Marie faced great opposition from male scientists in France and she never received the recognition she deserved. She died in 1934 from leukaemia, due to exposure to high-energy radiation used in her research. Radiation has since been used to treat cancer worldwide.
选项
A、In 1894.
B、In 1895.
C、In 1904.
D、In 1911.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/G1Cd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Inthe18thcentury,NewYorkwassmallerthanPhiladelphiaandBoston.TodayitisthelargestcityinAmerica.Howtoexplain
Inthe18thcentury,NewYorkwassmallerthanPhiladelphiaandBoston.TodayitisthelargestcityinAmerica.Howtoexplain
Leadersof16nationspaidapoignanttributetosurvivingveteransandthosewhodiedduringtheD-Daylandings60yearsagoth
Industrial【21】______doesnotjusthappen.Companies【22】______lowaccidentratesplantheirsafetyprograms,workhard
BeforeMikebecameanactor,whatkindofschooldidhegoto?
BeforeMikebecameanactor,whatkindofschooldidhegoto?
Fathersexposedtopoisonoussubstancesareprobablyjustaslikelytobethecauseofdefectsintheirunborninfantsasmother
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlagmakesbusinesstravelerslessproductiveandmorepr
AuniversitystudentinNairobi,Kenya,wasstoppedforatrafficviolationtheotherday.Thepolicemantookouthisticketboo
Whydoesanewbornbabyhavetospendthefirstyearofhislifelearningtolisten?
随机试题
甲、乙、丙拟设立一有限合伙企业,甲、乙为普通合伙人,丙为有限合伙人,下列不可以作为丙的出资的是:()
下列内容中,属于建筑安装工程施工图预算编制依据的是()。
某承包企业承包一工程,计划砌砖1600m3,按预算定额规定,每立方米耗用空心砖650块,每块空心砖计划价格为0.17元;而实际砌砖工程量却达2300m3,每立方米实耗空心砖720块,每块空心砖实际购入价0.24元,则空心砖单价变动对成本的影响额是(
设待传送数据总长度为L位,分组长度为P位,其中头部开销长度为日位,源节点到目的节点之间的链路数为h,每个链路上的延迟时间为D秒,数据传输率为Bbps,电路交换建立连接的时间为S秒,则传送所有数据,电路交换需时间是()。
Americaisoneofmanycountrieswherethestategivesaleg-uptomembersofcertainracial,ethnic,orothergroups【C1】______h
(2011下集管)某信息系统集成项目经理王某收到客户的最新变更要求,他带领其团队成员经过认真分析,发现这次变更将导致项目范围增加近70%,初步估计成本将增加5倍。王某必须要在已被批准的项目计划中改变原定的开始和结束日期,那么他的第一步工作应该是______
下列选项中不属于软件生命周期开发阶段任务的是
•Therearethirtyquestionsonthisquestionpaper.•Instructionsaregivenonthetape.•YoucanwriteonthisQuestionPape
Thetown’sairwasconsistently________:dependingonthebreeze,onemightbegreetedwiththesoureffluviaoftwentybrewerie
A、Ithasbeenthebestsellerforweeks.B、Itadvisespeopletochangethemselves.C、Itisbeingsoldataverylowprice.D、Itd
最新回复
(
0
)