首页
登录
职称英语
[originaltext] Most people think of astronomers as people who spend their ti
[originaltext] Most people think of astronomers as people who spend their ti
游客
2023-07-30
64
管理
问题
Most people think of astronomers as people who spend their time in cold observatories peering through telescope every night. In fact, a typical, astronomer spends most of his or her time analyzing data and may only be at the telescope a few weeks of the year. Some astronomers work on purely theoretical problems and never use a telescope at all. You night not know how rarely images are viewed directly through telescopes. The most common way to observe the skies is to photograph them. The process is very simple. First, a photographic plate is coated with a lightsensitive material. The plate is positioned so that the image received by the telescope is recorded on it. Then, the image cam he developed, enlarged and published so that many people can study it. Because most astronomical objects are very remote, the light we receive from them is rather feeble. But by using a telescope as a camera, long time exposures can be made. In this way objects can be photographed that are a hundred times tm faint to be seen by just looking through a telescope.
选项
A、To overcome the problem of weak light.
B、To take more photographs.
C、To photograph astronomical objects without using a telescope.
D、To spend less time at their telescopes.
答案
A
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/2882861.html
相关试题推荐
[originaltext]W:I’vejustreadacuriousfact.Didyouknowthatpeoplewhosp
[originaltext]W:I’vejustreadacuriousfact.Didyouknowthatpeoplewhosp
[originaltext]M:Thenwhydidyouapplyforthisjob?W:That’sbecauseofthe
[originaltext]M:Thenwhydidyouapplyforthisjob?W:That’sbecauseofthe
[originaltext]M:Thenwhydidyouapplyforthisjob?W:That’sbecauseofthe
[originaltext]M:Thenwhydidyouapplyforthisjob?W:That’sbecauseofthe
[originaltext]M:Thenwhydidyouapplyforthisjob?W:That’sbecauseofthe
[originaltext]Manyuniversitystudentsdislikestudyinghistorybecausetherei
[originaltext]Manyyearsagotherelivedaveryrichmanwhowantedtodosomet
[originaltext]Manyyearsagotherelivedaveryrichmanwhowantedtodosomet
随机试题
[originaltext]W:DidyouhearthatTiffanybrokeupwithherboyfriendlastnig
AsfarasIamconcerned,themainrequirementofaninternationallanguageist
Unlesswespendmoneytospotandpreventasteroidsnow,onemightcrashint
Alltoooften,peopleapproachtheirworkcareershaphazardly,waitingforo
国际航空货物运输中,关于重货与轻货的说法,不正确的是( )。A.每6000立方
使用调整净现值法(APV)应满足的假设是()A.假设项目的系统风险相当于企业投
医疗机构药事管理委员会主任委员一般由()。A.医疗业务主管领导担任 B.药剂
某饭店2012年营业收入为2000万元,营业成本为1580万元,净利为180万元
下列化合物中,可用来合成缩聚物的是( )。
关于气雾剂、喷雾剂的说法,正确的有A.阀门系统是决定定量气雾剂每揿喷射用量的
最新回复
(
0
)