首页
登录
职称英语
Thousands of years ago man used handy rocks for his surgical operations. Lat
Thousands of years ago man used handy rocks for his surgical operations. Lat
游客
2023-07-04
42
管理
问题
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.
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 itself down 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.
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. No knives, no stitches, no unwanted damage — a true surgical wonder. Operations which once left patients exhausted and in need of long period of recovery time now leave them feeling relaxed and comfortable. So much more difficult operations can now be tried.
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. Altogether, tomorrow may see more and more information coming to light on the diseases which can be treated medically. [br] The rapid development of laser techniques means that______.
选项
A、in another ten years we shall be able to cure cancer
B、we shall be capable of treating all the diseases
C、patients do not have to suffer any pain
D、surgery is likely to improve considerably
答案
D
解析
推理题。最后一段提到,将来,激光技术的迅速发展也许能治愈某些癌症,也会使手术既安全又更加有效。由此可推知,医学有望大大进步。故答案为D。
转载请注明原文地址:https://tihaiku.com/zcyy/2806812.html
相关试题推荐
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstoflo
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
Thousandsofyearsagomanusedhandyrocksforhissurgicaloperations.Lat
There’snothingliketheinstinctiveroarofthecrowdwhenthousandsofpeo
There’snothingliketheinstinctiveroarofthecrowdwhenthousandsofpeo
随机试题
Theyareregardedaschoresbybothsexes,butfall(1)_____ononlyone.The
Shortsightcanbe________bytheuseofsuitableglasses.A、fixedB、improvedC、r
Femalecheetahs(猎豹)attheBronxZooinNewYorkjustloveCalvinKlein’sO
[originaltext]EverycultureandeverycountryintheworldcelebratestheN
下列关于百科全书的表述,错误的是()。A.百科全书具有知识标准的性质 B.百
开展变形观测的专用水准点位置与邻近建筑物的距离不得小于建筑物基础埋深的A.1.0
C 写出最后结果。
自有固定资产比例为自有固定资产与资本总额之比。自有固定资产是指固定资产折旧后的净
男性,40岁,昨晚聚餐饮酒较多。今晨一点多突然右足疼痛惊醒,疼痛剧烈难以忍受。既
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
最新回复
(
0
)