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
51
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:http://tihaiku.com/zcyy/3428076.html
相关试题推荐
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
IntheAmericanfamilythehusbandandwifeusuallyshareimportantdecision
RecentlytheBarbicanmuseuminLondonheldanexhibitioncalledtheRainRo
Readingisanimportantskillthatneedstobedevelopedinchildren.Noton
Readingisanimportantskillthatneedstobedevelopedinchildren.Noton
Readingisanimportantskillthatneedstobedevelopedinchildren.Noton
随机试题
[originaltext]WhowasthattalkingtoMr.Thompsonattheconference?(A)Inan
FoodandFitness:theAmericanObsessionAmericansseemtobealways
肝性脑病患者出现抽搐时不应使用下列那种药物:A.安定 B.东莨菪碱 C.扑尔
A.风 B.燥 C.暑 D.寒 E.火具有明显季节性的邪气是
川芎的分泌组织是A.树脂道 B.油管 C.油室 D.油细胞 E.乳汁管
血证调护
A.实证 B.癥疾 C.瘕证 D.瘀证 E.虚实夹杂证腹块时有时不明显,
A.瞳孔缩小 B.桡动脉搏动消失 C.股动脉搏动消失 D.突然意识丧失、颈
2011年,我国能源自给率(能源生产总量与一次能源消费总量之比)为:()
对投资者来说,进行证券投资分析有利于(),A:减少盲目投资B:促进市场成交C
最新回复
(
0
)