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
2024-02-06
52
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 best title for the passage is______.
选项
A、The Light
B、The Laser
C、A Laser Beam
D、The use of Laser
答案
C
解析
主旨题。通读全文可知,全文通篇在讲laser beam,并介绍了它的来源和用途。由此可知,选项C正确。
转载请注明原文地址:https://tihaiku.com/zcyy/3428078.html
相关试题推荐
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
RecentlytheBarbicanmuseuminLondonheldanexhibitioncalledtheRainRo
RecentlytheBarbicanmuseuminLondonheldanexhibitioncalledtheRainRo
RecentlytheBarbicanmuseuminLondonheldanexhibitioncalledtheRainRo
Readingisanimportantskillthatneedstobedevelopedinchildren.Noton
Readingisanimportantskillthatneedstobedevelopedinchildren.Noton
随机试题
Insportthesexesareseparate.Womenandmendonotrunorswiminthesam
Highstreetshopsuseavarietyofmeanstoattractshoppers,suchasstriki
[originaltext]OneofraymaingoalsinthissurveycourseofAmericanpainting
小肠吸收的物质中,主要以被动形式吸收的是()A.水和钾 B.钙和钠 C.糖
某高速公路沥青路面表面层AC-13,采用3种规格石灰岩粗集料,分别10mm-15
父母去世后、老夏把未成年的弟弟抚养成人,老夏夫妇育与一子一女,均已结婚生子、生活
以下6个图形为正方体的外表面展开图,其中3个图形组成的正方体相同,另外3个图形组
某企业客户已开立基本存款账户,因贷款需要在某商业银行新开立账户,该账户不必支取现
A公司向B企业购买一批原材料,开出一张票面金额为60万元的银行承兑汇票。出票日期
患者男性,40岁,确诊肝炎后肝硬化10年,2小时来患者出现呕血及黑便,并逐渐表现
最新回复
(
0
)