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
1. Thousands of years ago man used handy rocks for his surgical operations. Later he used sharp bone or horn, metal knives and,
1. Thousands of years ago man used handy rocks for his surgical operations. Later he used sharp bone or horn, metal knives and,
admin
2009-06-15
58
问题
1. Thousands of years ago man used handy rocks for his surgical operations. Later he used sharp bone or horn, metal knives and, more recently, rubber and plastic. And that was where we stuck, in surgical instrument terms, for many years. 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, in time, to revolutionize the art and science of surgery.
2. The tool is the laser and it is being used by more and more surgeons all over the world, for a very large number of different complaints. The word laser means: Light Amplification by Stimulated Emission of Radiation. As we all know, light is hot; any source of light--from the sun it self clown to a humble match burning--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.
3. Experiments with these pinpoint beams have shown 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 the human eye without harming the front of the eye, simply by passing a laser beam right through the eyeball. No knives, no stitches, no unwanted damage--a true surgical wonder.
4. Operations which once left patients exhausted and in need of long periods of recovery time now leave them feeling relaxed and comfortable. So much more difficult operations can now be tried.
5. 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 more effective. Altogether, tomorrow may see more and more information coming to light on the diseases which can be treated medically.
选项
答案
A
解析
第一段意为:外科新工具的运用。
转载请注明原文地址:https://kaotiyun.com/show/Yo1d777K
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
Earlyonemorning,morethanahundredyearsago,anAmericaninventorcalledEliasHowefinallyfellasleep.【R1】______Butheha
【R1】______Afullmoon,softcandlelight—themoodiscomplete.Addanattractivepartnerandsomesoftbackgroundmusic,whoca
Readthefollowingarticleandanswerquestions9-18onthenextpage.AreYouLookingafterYourself?1.Runningisan
Theexaminerasksyouandyourpartnerquestionsaboutyourselves.Youmaybeaskedaboutthingslike’yourhometown’,’yourin
ANEWCRUISESHIPOneofthebiggestpassengershipsinhistory,theIslandPrincess,carriespeopleoncruisesaroundtheCa
TheDailyNewsisofferingfreeflightstoanumberofEuropeancities.TheseticketsallowpassengerstoflydirectlyfromHea
MenTooMaySufferfromDomesticViolenceNearlythreein10menhaveexperiencedviolenceatthehandsofanintimatepartnerd
AGoalsBHistoryofWomen’sRightsMovementCStartofWomen’sRightsMovementDTraditionalStatusofWomenERightsofW
AManagement’sReactiontotheLaborMovementBTheDeclineofanEarlyUnionCReasonsforStartingaUnionDComparisonbe
随机试题
论述关于艺术发生的几种主要学说。
A.郁李仁B.甘遂C.芒硝D.牵牛子治疗目赤及疮痈肿痛可选用
最常能听到的胸膜摩擦音的部位是
石棉肺的发病机制有以下学说,但最近被多数人认可的是
某企业的运货卡车2001年因维修停运了2个月,这辆车不必缴纳车船使用税。( )
()是我国股权投资基金的自律组织。
按长期股权投资准则规定,下列事项中,不属于长期股权投资的有()。
穷对于()相当于独对于()
认为教育并不提高人的能力,只是区别不同人的能力的理论是
•ReadthearticlebelowaboutTheImport-ExportBalance.•Foreachquestion31—40,writeonewordinCAPITALLETTERSonyourAns
最新回复
(
0
)