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
48
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】______.
【B1】
选项
答案
mysterious
解析
转载请注明原文地址:https://kaotiyun.com/show/4sj7777K
0
大学英语四级
相关试题推荐
A、Hecan’tseethingsclearly.B、Hiseyedoesn’thurtverymuch.C、He’sfeelingunderweather.D、Hiseyehealsveryquickly.C女士
Nowadays,people’slifestylesarechanging,whichhasresultedinthedemandforfastfoods.Thepoisonproducedbybacteriais
Nowadays,people’slifestylesarechanging,whichhasresultedinthedemandforfastfoods.______isaverycommonwaythatm
Nowadays,people’slifestylesarechanging,whichhasresultedinthedemandforfastfoods.Fruitthatisnotfreshcanalsoc
People’s__________(对这些摩天大楼群的态度)varywidely.
A、Theytakegamesseriously.B、Theythinkgamesaresecondary.C、Theythinkgamesarethemostimportant.D、Lessonsandgamesar
WhoshowedLangLanghowtocontrolthekeys?WhatspecialthingsdidLangLangdoforhisfather?
A、Summer.B、Winter.C、Fall.D、Spring.D[听力原文]Whatisthebestseasonforthinking?信息明示题。文章提到Springappearstobethebestperi
Accordingtothetext,childrenwhogetautismmaysufferfrom______.Whyisitveryimportanttotreatachildwithautismby
随机试题
直流电动机转速与电源电压有关。()
下潜油电泵当油管下到最后1根时,在距井口以下5m处的油管上打1~2个电缆卡子。()
A.瘙痒症B.慢性单纯性苔藓C.湿疹D.夏季皮炎E.扁平苔藓以阵发性剧痒及皮肤苔藓样变为特征的慢性炎症性皮肤病
雷尼替丁的临床适应证不包括
某检察院在对国家机关工作人员张某巨额财产来源不明案进行侦查时,发现其巨额财产三分之二为诈骗所得,三分之一为盗窃所得。关于此案,下列哪一选项是正确的?()
团体初创阶段的活动主要有两类,它们是()。
材料:下面是某初中生物教师编制的客观题试题:一、单项选择题①植物根部通过根毛吸收而来的水分和无机盐进入植物体内后通过()运送到植物的枝、叶、花和果实。A.导管B.筛管C.细胞间质②植物的繁殖器官是()。A.根、茎、叶B
A公司向银行借入短期借款10000元,支付银行贷款利息的方式同银行协商后,银行提出三种方案:
“天下兴亡。匹夫有责”。但有人认为。天塌下来有高个子顶着。这种现象你怎么看?
袋子中有黑球3个,白球4个,无放回式拿出。则第一次拿到白球,第二次拿到黑球,第三次拿到白球的概率是()。
最新回复
(
0
)