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
A、They are expensive to make. B、They are extremely accurate. C、They were first made in space. D、They were invented in the 1970s.
A、They are expensive to make. B、They are extremely accurate. C、They were first made in space. D、They were invented in the 1970s.
admin
2021-01-06
24
问题
Some people wonder why countries spend millions of dollars on space projects. (16) They want to know how space research helps people on Earth. Actually, space technology helps people on Earth every day. This is called "spin-off technology." Spin-off technology is space technology that is now used on Earth. (17) In early space programs, such as the Apollo missions of the 1960s and 1970s, and in the space shuttle missions today, scientists developed objects for the astronauts to use on the moon and in space. We now use some of these objects everyday. (18) For example, we have quartz crystal clocks and watches accurate to within one minute a year. We purify the water we drink with the water filter designed for the astronauts’ use in space. The cordless, hand-held tools we use in our homes, such as vacuum cleaners, flashlights, drills and saws came from the technology of these early space programs. On cold winter days, we can stay warm with battery-operated gloves and socks, and specially-made coats and jackets. All these clothes are similar to the spacesuit designs that kept astronauts comfortable in the temperatures of the moon, and are spin-offs from space technology. These products are only a few examples of the many ways space technology helps us in our everyday lives. No one knows how new spin-off technology from the International Space Station will help us in the future.
Questions 16 to 18 are based on the passage you have just heard.
16. What do some people want to know about space exploration?
17. What did scientists do for the space shuttle missions?
18. What does the speaker say about quartz crystal clocks and watches?
选项
A、They are expensive to make.
B、They are extremely accurate.
C、They were first made in space.
D、They were invented in the 1970s.
答案
B
解析
短文提到,我们现在使用的石英钟和石英表的精确度达到了一年误差在一分钟以内,因此答案为B)。
转载请注明原文地址:https://kaotiyun.com/show/D3O7777K
0
大学英语四级
相关试题推荐
A、Togetfundingfromthecity’srecyclingcenter.B、Toraisepeople’sawarenessofrecycling.C、Toforcethegovernmenttochan
A、HedidresearchinKahn’sfactories.B、Hereadalotofbackgroundmaterials.C、HefocusedonKahn’sclassicaldesign.D、Hewe
舞龙(dragondance)是中华文化中一种传统的舞蹈表演形式。传统上来讲,其表演动作象征着龙的历史地位,展示了力量与尊贵。舞龙起源于汉代(theHartDynasty)。人们认为它最初是作为耕作收成文化的一部分;同时也是一种治病防病的方法起源。舞
七夕节(QixiFestival)在农历七月初七庆祝,起源于汉代(theHanDynasty),是一个传统节日。在中国古代传说中,牛郎和织女(cowherdandweavergirl)会在每年的这一天相会。七夕节是中国传统节日中最具浪漫色彩的一
闪婚(flashmarriage)这一都市情感快餐已在我国不少城市悄然登场。青年男女,尤其是20一30岁之间的青年,闪电相识,爱情速配,已成为一种时尚。闪婚男女在相识很短一段时间后就确立恋爱关系或婚姻关系。他们几秒钟可以爱上一个人,几分钟就能谈完一场恋爱
A、Athome.B、Attheairport.C、Intheman’scar.D、Bythesideofataxi.A
A、Friends.B、Coworkers.C、Interviewerandinterviewee.D、Doctorandpatient.C综合推断题。面试对话的一个重要特征是:面试人主要提问,受试人主要回答问题,对话内容以学习背景、工作经
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmostareligion.Thousandsofsportsfansbuyexpensivetic
FormanypeopleintheU.S.,sportsarenotjustforfun.Theyarealmostareligion.Thousandsofsportsfansbuyexpensivetic
A、Saygoodbyetothewomanattheairport.B、MeetthewomanattheBlackCatCafe.C、Drivethewomantotheairport.D、Havelunc
随机试题
固定资产有以下特点:
鼻咽癌常发生在
女性,45岁。颌面部损伤,上颌骨骨折,出血700ml,烦躁,面色苍白,皮肤湿冷,血压14.7/12.5kPa(110/94mmHg),脉搏100次/分。此时患者病情处在哪种情况
关于平屋面天沟、檐沟的纵坡及沟底水落差的选择,哪一组是合理的?[1995年第078题][1999年第077题]
被称为梆子戏,代表剧目有《穆桂英挂帅》《花木兰》《朝阳沟》等的是()。
人前进的时候,一只手朝前,一只手朝后,朝前的手可以接受先行者的忠告,朝后的手拉一把紧跟着的后来者,人类的发展就是这样一条链。请结合你对教育的思考,写一篇不少于600字的文章,诗歌除外。
Pentium微处理器在突发式读周期传送第一个数据时,和(CacheEnable)信号的状态分别为
数据库设计的四个阶段是:需求分析,概念设计,逻辑设计和【】。
MarianneMontgomerywastimidandunadventurous,hervitalityconsumedbyphysicalactivityandlonging,herintelligencebyind
Anissuethatmanycorporateexecutivesignoreisthepossibilitythataggressivepeopleseekreinforcementfortheirowndestru
最新回复
(
0
)