首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
The word laser stands for "light amplification by stimulated emission of radiation". To many people lasers are very【B1】______, b
The word laser stands for "light amplification by stimulated emission of radiation". To many people lasers are very【B1】______, b
admin
2010-04-12
19
问题
The word laser stands for "light amplification by stimulated emission of radiation". To many people lasers are very【B1】______, but a laser is simply a【B2】______that produces a very strong light. The light from a laser is called【B3】______light because it is light that moves in only one direction. In contrast, incoherent light, like the light form the sun or a light【B4】______, moves away from its【B5】______in all directions and【B6】______in a narrow beam.
As soon as the laser was developed, scientists began thinking of practical【B7】______for it. One of the earliest uses was to make extremely【B8】______measurements of distance and speed. As time passed, many more applications for the laser were developed.【B9】______.From laser printers to technology by which whole encyclopedias of information can be stored on a laser disk (called a CD-ROM) and read by a computer, lasers are revolutionizing computers.
Lasers have also made a big difference in the way telephones work. Instead of changing sound waves to electricity that travels through copper wire,【B10】______One such fiber can carry more than a million conversations at the same time!
【B11】______.
【B9】
选项
答案
Over the past twenty years, personal computers have brought tremendous’ changes to the home and the workplace. And many of the most important developments in computer technology are based on lasers.
解析
转载请注明原文地址:https://kaotiyun.com/show/Ssj7777K
0
大学英语四级
相关试题推荐
A、Wearemakingtoomanyvehicles.B、Wehavemoreandmoreindustry.C、Therearetoomanydevelopingcountries.D、Peopleusetoo
Nowadays,people’slifestylesarechanging,whichhasresultedinthedemandforfastfoods.Thepoisonproducedbybacteriais
A、Thecookingtechnologyhasbeenimprovedgreatly.B、Peoplenowadaystakecookingastheirhobby.C、Familymembersaredecreasi
Itisawell-knownfactthatthereareconstantconflictsamongdifferentgroupsofpeople,andthatpeopletendtoblametheir
A、Whenhecan’tgethispointacross.B、Whenpeoplearenotreceptivetonewideas.C、whenhecomesintoconflictwithhiscolle
A、Mrs.Fisherwantstogoabroad.B、Mrs.Fisherisinhospital.C、Mrs.Fisherhasnofamily.D、TherearethreepeopleinMrs.Fi
WhoshowedLangLanghowtocontrolthekeys?WhatspecialthingsdidLangLangdoforhisfather?
Accordingtothetext,childrenwhogetautismmaysufferfrom______.Whyisitveryimportanttotreatachildwithautismby
Thoughshehasboughtmanyclothes,sheisalways__________(抱怨缺少合适的衣服).
随机试题
嘧啶环中的两个氮原子分别来自
A.质子泵抑制剂B.手术切除C.饮蛋清及稀释牛奶D.多潘立酮(吗丁啉)萎缩性胃炎伴重度不典型增生应采用
骨肉瘤的主要转移途径
A.伤侧肺萎陷B.纵隔扑动C.纵隔移向伤侧D.胸膜腔内压增高E.肺泡破裂张力性气胸的病理生理特点是
某市新建的一座大型综合楼,需要在里面安装一些消防设施。在安装消防应急指示灯时,不符合消防应急标志灯具安装要求的是()
企业价值评估中,确定各种资本权数的方法包括()。
体育教学过程的基本构成因素是体育教师、学生、体育教材和教学方法。()
Mydaughterislookingforwardto______(收到)lettersfromherfriends.
学校规定数学测验的优秀率不能超过5%,数学期末测验的平均分为83分,标准差为6分。那么优秀率的最低分为()
Theworldisonthetopofastaggeringriseinthenumberofoldpeople,andtheywilllivelongerthaneverbefore.【C1】_______
最新回复
(
0
)