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
Thousands of years ago man used handy rocks for his surgical operations. Later he used sharp bones or horns, metal knives and mo
Thousands of years ago man used handy rocks for his surgical operations. Later he used sharp bones or horns, metal knives and mo
admin
2014-05-25
70
问题
Thousands of years ago man used handy rocks for his surgical operations. Later he used sharp bones or horns, metal knives and more recently, rubber and plastic. In the 1960s a new tool was developed, one which was, first of all, to be of great practical use to the armed forces and industry, but which was also to revolutionize the art and science of surgery.
The tool is the laser and it is being used by more and more surgeons all over the world. As we all know, light is hot, and any source of light will give warmth. But light is usually spread out over a wide area. The light in a laser beam, however, is concentrated. This means that a light with no more power than that produced by an ordinary electric light bulb becomes intensely strong as it is concentrated to a pinpoint-sized beam.
Experiments with these pinpoint beams showed researchers that different energy sources produce beams that have a particular effect on certain living cells. It is now possible for eye surgeons to operate on the back of human eye without harming the front of the eye, simply by passing a laser beam right through the eye-ball. Operations which once left patients exhausted and in need of long period of recovery time now leave them feeling relaxed and comfortable.
The rapid development of laser techniques in the past ten years has made it clear that the future is likely to be very exciting. Perhaps some cancers will be treated with laser in a way that makes surgery not only safer but also more effective.
What do we find after the development of the laser in the 1960s?
选项
A、Industrial revolution brought surgery changed greatly.
B、Medical help became available for industrial workers.
C、The study of art went through a complete revolution.
D、Human being’ s methods in surgery changed greatly.
答案
D
解析
事实细节题。题干的意思是“20世纪60年代激光取得发展后我们可以发现?”根据原文第一段最后一句可知“激光为外科手术带来革命性的变化”,故选D。
转载请注明原文地址:https://kaotiyun.com/show/XBud777K
本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
相关试题推荐
Lipstickplaysanimportantroleinwomen’slifebecause______.Itcanbeinferredfromthispassagethat______.
Itwas7:00aminKyoto,Japan,andthetaxicompanyhadjustcalledasecondtimetosaytheycouldn’tfindmyhouse.Onceagai
Thethoughtnevercrossedthevillagers’mind______theyshouldmovetoanotherplacesothatapowerstationcouldbebuilt.
Whatdoesthewritermainlytalkaboutinthispassage?Accordingtothecontext,theunderlined"simplereading"(Para.1)done
Wefindthatbrightchildrenarerarelyheldbackbymixed-abilityteaching.Onthecontrary,boththeirknowledgeandexperienc
Cars!!!Holidays!Thousandsofprizes!Hurry!FREEwitheverypacketofSPLASH!Yourpersonalluckynumber!Willbeamon
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Laterheusedsharpbonesorhorns,metalknivesandmo
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Laterheusedsharpbonesorhorns,metalknivesandmo
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Laterheusedsharpbonesorhorns,metalknivesandmo
随机试题
中国历史上第一次用碑刻经书的方式对经典语言文字进行规范的伟大工程是
我国台湾学者将“自下而上”的研究路径称为
胎盘早剥并发DIC的诊断依据,不包括
脊髓压迫症韵手术治疗需抓紧时机,一般争取在发病6h内减压。
股静脉穿刺点位于紧靠股动脉内侧0.5cm处。()
在农村人口的相对数量和绝对数量已经不大的城市化的后期阶段,城镇人口占总人口的比重在()。
隔热耐火材料的特性包括()。
下列标题正确的是()。
某企业拟开设4门培训课程:《企业文化培训》《劳动法培训》《商务礼仪培训》《销售培训》。员工甲、乙、丙、丁4人各选修了其中一门课程。已知:①他们4人选修的课程各不相同。②法律专业毕业的丙选修的是非法律类课程。③甲选修的不是《企业文化培训》就是《商务礼仪培训》
Questions1-5DothefollowingstatementsreflecttheclaimsofthewriterinReadingPassage1?Inboxes1-5onyouranswershe
最新回复
(
0
)