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] 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/2811812.html
相关试题推荐
[originaltext]Route66wasonceveryfamousinAmerica.Ithasbeencalled
[originaltext]Route66wasonceveryfamousinAmerica.Ithasbeencalled
Topuniversitieshavebeencalledontopublishlistsof"banned"A-levels
Topuniversitieshavebeencalledontopublishlistsof"banned"A-levels
Topuniversitieshavebeencalledontopublishlistsof"banned"A-levels
Topuniversitieshavebeencalledontopublishlistsof"banned"A-levels
Topuniversitieshavebeencalledontopublishlistsof"banned"A-levels
Topuniversitieshavebeencalledontopublishlistsof"banned"A-levels
Topuniversitieshavebeencalledontopublishlistsof"banned"A-levels
Topuniversitieshavebeencalledontopublishlistsof"banned"A-levels
随机试题
Matchthesoundswiththeircorrectmeanings.Writetheappropriateletteronyo
Oceanographyhasbeendefinedtheapplicationofall【S1】____
Youshouldspendabout20minutesonQuestions1-13whicharebasedonReadingP
关于互联网个人贷款,以下说法错误的是()。A.对于强增信基础类客户,多考虑发放
属于“相使”配伍的是A.麻黄与苦杏仁B.甘遂与海藻C.川乌与川贝母D.半夏与瓜蒌
下列首选庆大霉素治疗的严重感染是A.结核性脑膜炎 B.严重革兰阴性杆菌感染性败
硅胶的吸附能力在油温()是最大。 (A)75℃;(B)20℃;(C
下列关于计算机网络的说法错误的是()。A:网络中必须有两台以上的计算机,地理位置
共用题干根据《宪法》和法律的规定,关于国家机关组织和职权,下列选项正确的是、A
孕妇尿中与胎儿胎盘单位功能关系密切相关的激素是 A.雌二醉 B.雌三醉
最新回复
(
0
)