首页
登录
职称英语
A very interesting and important development in science is a device called l
A very interesting and important development in science is a device called l
游客
2023-07-05
35
管理
问题
A very interesting and important development in science is a device called laser. A laser is a machine which produces a light beam. The light produced by a laser is a very special kind of light. The light, called laser beam, is powerful and can be made to do many things. The laser was first developed in 1960, about half a century ago.
There are many different uses for lasers and several different types have been developed. Some use gases to produce the light beam. The gases are heated and cooled, and these processes cause the gases to produce energy in the form of light. One special point of lasers is that the light beam can be stored. If the stored light is then suddenly let go, it is extremely powerful. The light from a laser beam can be used either by storing it and letting it go suddenly, or by using it in a continuous stream.
There are three important areas where the control of the laser beam has been put into use by scientists. These areas are industry, communications, and medicine. In each area, the scientists have been able to use the laser to do things that they could not do in another way. The laser has been very helpful.
In industry, the laser beam has been used for measurement and drilling. When something large is being built—for example, a large bridge—it is important to have very accurate measurements. By accurate measurement, lasers are also helpful in laying down pipelines over long distances. As lasers become more common in industry, there will be more and more uses for them. [br] The laser beam can be used______.
选项
A、only in the areas of construction
B、to cure a patient of a disease
C、in a few areas because it’ s not so powerful
D、to do whatever people want to
答案
B
解析
细节题。使用排除法。根据短文第三段内容可知选项A、C、D都不符合文中表述,所以都可排除。而根据These areas…and medicine,可推断选项B正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2809890.html
相关试题推荐
[originaltext]Peanutsareanimportantcropinmanydevelopingcountries.B
[originaltext]Conversationsarereallykindofinteresting.[16]Iguessit’sk
[originaltext]Conversationsarereallykindofinteresting.[16]Iguessit’sk
[originaltext]M:Goodafternoon,ma’am.I’mMr.Smith.Icalledyoualittlewh
[originaltext]M:Goodafternoon,ma’am.I’mMr.Smith.Icalledyoualittlewh
西部大开发(westerndevelopmentcampaign)是中国政府的一项政策,于2000年开始运作。目的是提高西部地区的经济和社会发展水平
Oneafternoonrecently,two【B1】______friendscalledtotellmethat,well,t
Oneafternoonrecently,two【B1】______friendscalledtotellmethat,well,t
Oneafternoonrecently,two【B1】______friendscalledtotellmethat,well,t
Oneafternoonrecently,two【B1】______friendscalledtotellmethat,well,t
随机试题
Questions27-30Foreachquestion,onlyONEofthechoicesiscorrect.Writethe
ItwasnotuntillastFriday______(他读完了他妈妈送给他的那本书).thathefinishedreadingt
NarratorListentopartofalectureinabiologyclass.Nowgetreadytoanswer
TheUniversityBookstoreisaself-supportinguniversity-ownedorganization,
数据库长久的数据模型有层次模型、网状模型、关系模型等,在档案数据库设计中采用比较
蛋白质生物价的计算公式为( )。A.吸收氮/储留氮×100 B.摄入氮/储
Thechangeinthatvillagewasmiraculou
D
某24层高层住宅楼,首层层高3.25m,结构总高度66.80m,采用钢筋混凝土全
由于采用了()定位,实现了海上远程打桩的全天候作业,工效显著提高。A.海上测量
最新回复
(
0
)