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
2023-07-06
56
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] What is important in building large things?
选项
A、To drill holes accurately.
B、To lay down long pipelines.
C、To cut pipes by lasers.
D、To measure accurately.
答案
D
解析
细节题。文章最后一段第二句指出When something large is being built—for example,a large bridge一it is important to have very accurate measurements.即激光束在建造大型建筑物时发挥重要作用因为它可以精确测量。故选D。
转载请注明原文地址:https://tihaiku.com/zcyy/2811811.html
相关试题推荐
[originaltext]Withthedevelopmentofthecomputer,thepossibilityofstor
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
Teachingchildrentoreadwellfromthestartisthemostimportanttaskof
TheUnitedStates’predominanceinscienceandtechnologyisfading,arepor
TheUnitedStates’predominanceinscienceandtechnologyisfading,arepor
TheUnitedStates’predominanceinscienceandtechnologyisfading,arepor
TheUnitedStates’predominanceinscienceandtechnologyisfading,arepor
TheUnitedStates’predominanceinscienceandtechnologyisfading,arepor
HowsciencegoeswrongScientificresearchhasc
随机试题
[originaltext]Amobileofficeis,quiteliterally,anofficewhichiscapab
With950millionpeople,IndiarankssecondtoChinaamongthemostpopulous
A.whereB.exceptionsC.affairsD.meetE.cracksonF.cracksupG.r
AwomaninGuangzhouwasbittenbyherpetafterataxistruckthedogatacros
Whilethe1970spoppsychotherapymovementfocusedontheimportanceoflett
下列关于消防水泵房的叙述有错的是( )。A.独立设置的消防水泵房,其耐火等级必
以下选项中,()为螺杆式制冷压缩机的供油方式。A.润滑油喷射润滑 B.压力
常见引起肾前性肾衰竭的病因是A.肝门静脉高压症致食管曲张静脉破裂 B.高血压肾
AstartupcompanyinCaliforniaisusing
随着我国城市建设的快速发展,为保证新建或在役供水和供气管道的安全运行,降低或消除
最新回复
(
0
)