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
97
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/3426156.html
相关试题推荐
Sometimeago,aninterestingdiscoverywasmadeby【C1】______ontheAegeani
Sometimeago,aninterestingdiscoverywasmadeby【C1】______ontheAegeani
Sometimeago,aninterestingdiscoverywasmadeby【C1】______ontheAegeani
Sometimeago,aninterestingdiscoverywasmadeby【C1】______ontheAegeani
Sometimeago,aninterestingdiscoverywasmadeby【C1】______ontheAegeani
Sometimeago,aninterestingdiscoverywasmadeby【C1】______ontheAegeani
WhoLives?WhoDies?WhoDecides?A)SomehavecalleditaRi
WhoLives?WhoDies?WhoDecides?A)SomehavecalleditaRi
WhoLives?WhoDies?WhoDecides?A)SomehavecalleditaRi
WhoLives?WhoDies?WhoDecides?A)SomehavecalleditaRi
随机试题
Whathavepeoplediscoveredabouthobbies?Hobbiescanbeprofitableand______.
Mostmenliveinharness.Richardwasoneofthem.Typicallyhehadnoaware
下列哪些肾小球肾炎,可见新月体形成()A.膜性增生性肾小球肾炎 B.IgA
在运动技能的学习过程当中,学生表现出紧张、动作不协调的状态,并且有多余的动作,这
碳酸锂中毒的主要表现为A.肝脏损害B.血压下降C.心律失常D.肾功能下降E.中枢
新近发现蚜虫有一项“特异功能”:蚜虫或许能吸收阳光,为新陈代谢过程提供能量。蚜虫
解救乌头类药物中毒,可注射的药物是A.阿托品 B.解磷定 C.二巯基丙醇类
甲公司为增值税一般纳税人,采用实际成本法核算材料,适用的增值税税率为13%,1
女,63岁。夜尿增多伴血压升高2年,乏力、纳差1个月,既往间断服用“龙胆泻肝丸”
建设工程项目总进度目标论证的工作包括:①项目结构分析;②编制各层进度计划;③进度
最新回复
(
0
)