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
Scientists working on a problem do not know and sometimes can’t even guess what the final result will be. Late on Friday, 8 Nove
Scientists working on a problem do not know and sometimes can’t even guess what the final result will be. Late on Friday, 8 Nove
admin
2009-06-15
122
问题
Scientists working on a problem do not know and sometimes can’t even guess what the final result will be. Late on Friday, 8 November, 1895, Professor Rontgen, a German physicist, was doing an experiment in his laboratory when he noticed something extraordinary. He had covered an electric bulb with black cardboard, and when he switched on the current he saw little dancing lights on his table. (46); how then could any ray penetrate? On the table there were some pieces of paper which had been covered with metal salts. (47). Professor Rontgen took a piece of this paper and held it at a distance from the lamp. Between it and the lamp he placed a variety of objects, a books, a pack of cards, a piece of wood and a door key. The ray penetrated every one of them except the key. He called his wife into the laboratory and asked her to hold her hand between the lamp and a photographic plate. (48), but she held up her hand for a quarter of an hour, and when the plate was developed there was a picture of the bones of her hand and of the ring on one finger. The mysterious ray could pass through the flesh and not through the bone or the ring.
At a scientific meeting, Professor Rontegen called this new ray "the unknown", the X-ray.(49), and soon there were X-ray machines in all the big hospitals. The most obvious use for this discovery was to enable doctors to see exactly how a bone was fractured. Other uses came later. It was found that these rays could be used to destroy cancer cells, just as they destroyed the healthy cells of the doctors who first used the machines. (50), and the lungs could be X-rayed to show if there was any tuberculosis present.
A. It was on this paper that the lights were shining
B. She was very surprised by this request
C. Now the bulb was completely covered
D. It was a great invention
E. Methods were found later by which ulcers in the stomach could be located
F. Doctors quickly saw how this could be used
选项
答案
E
解析
意为:溃疡的位置被找到了。
转载请注明原文地址:https://kaotiyun.com/show/rz1d777K
本试题收录于:
职称英语卫生类C级题库职称英语分类
0
职称英语卫生类C级
职称英语
相关试题推荐
Writeaboutthefollowingtopic:Technologygivesyoungpeopletodayknowledgeandpowerthattheyhaveneverhadbefore.Th
Usingtheinformationinthetext,completeeachsentence14-18withanexpressionfromthelistbelow.Foreachsentence(14
1.WhydosomanyAmericansdistrustwhattheyreadintheirnewspapers?TheAmericanSocietyofNewspaperEditorsistryingto
1.Forsomeyears,therehasbeenaplantosolvethewatershortageproblembymovinghugeicebergshalfwayroundtheworld—f
Ifyouintendusinghumorinyourtalktomakepeoplesmile,youmustknowhowtoidentifysharedexperiencesandproblems.Your
1.Workingparentsandteachersseeafter-schoolprogramsnolongerasoptional,butasanessentialsupportforchildrenasthe
Youaregoingtoreadanewspaperarticleaboutamanwhoisrunningroundtheworld.Eightparagraphshavebeenremovedfromth
Youaregoingtoreadamagazinearticleaboutlearningtoflyaplane.Eightparagraphshavebeenremovedfromthearticle.Cho
Largecarsusemorepetrolthansmallcars.Smallcarsdon’tuseas_____________________largecars.
Itwasobviousthathewasnotgoinghome.
随机试题
Lessthanayearago,anewgenerationofdietpillsseemedtoofferthelongsoughtanswertoourchronicweightproblems.Hund
黄某对劳动仲裁制度有如下理解,其中错误的是( )。如果建筑公司对仲裁裁决不服的,自收到裁决书之日起( )日内,可以向人民法院起诉。
下列关于疏散分析参数的说法,错误的有()。
下列各项符合房产税规定的是()。
某企业发出存货采用加权平均法结转成本,桉单项存货计提跌价准备,存货跌价准备在结转成本时结转。该企业2018年1月1日存货的账面余额中包含甲产品1200吨,其采购成本300万元,加工成本60万元,采购时增值税进项税额48万元,已计提的存货跌价准备30万元,
关于翻门的说法,正确的有()。
小雪有很长一段时间总是感到心烦意乱,坐立难安,不知道为什么有种很担忧的感觉,但是又说不清楚具体在担忧什么。小林的症状属于()。
耐甲氧西林金黄色葡萄球菌(MRSA)、克雷伯氏菌等细菌能引起多种疾病和感染。同时各种抗生素往往又对它们无可奈何,这些令人色变的细菌因而被称为超级细菌。近年来,研究人员通过微生物的全基因组测序技术不仅能追踪MRSA的源头,而且能追踪到其他耐药细菌的源头。因此
【黄天荡之战】
PC机执行输出指令,OUT时,向I/O端口芯片送出的有效控制信号是( )。
最新回复
(
0
)