首页
登录
职称英语
According to the speaker, what do people often think about astronomers? [br] [o
According to the speaker, what do people often think about astronomers? [br] [o
游客
2024-10-08
8
管理
问题
According to the speaker, what do people often think about astronomers? [br]
Most people think of astronomers as people who spend their time in cold observatories peering through telescopes every night. In fact, a typical astronomer spends most of his or her time analyzing data and may only be at the telescope for a few weeks of the year. Some astronomers work on purely theoretical problems and never use a telescope at all.
You might 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 light-sensitive material. The plate is positioned so that the image received by the telescope is recorded on it. Then the image can be 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 too faint to be seen by just looking through a telescope.
选项
A、To decrease the time it takes to photograph objects.
B、To avoid using a telescope.
C、To sharpen the color of what they observe.
D、To obtain images of distant objects.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3792057.html
相关试题推荐
AccordingtotheresearchbyNASA,anafternoonnap______.[br][originaltext]
AccordingtotheresearchbyNASA,anafternoonnap______.[br][originaltext]
AccordingtotheresearchbyNASA,anafternoonnap______.[originaltext]T
WhichofthefollowingareNOTthefirstpeopletoreceivetheswinefluvaccina
Whatdoesthespeakermeanwhenhesays"Idon’tthinkIneedtotellyouwhyth
Whatdoesthespeakermeanwhenhesays"Idon’tthinkIneedtotellyouwhyth
Accordingtothespeaker,whatdopeopleoftenthinkaboutastronomers?[br][o
WhichofthefollowingisNOTanevidenceofsomepeople’scarelessnessindaily
WhichofthefollowingisNOTanevidenceofsomepeople’scarelessnessindaily
PeopleinLatinAmericawearsomething______toexpresstheirhopesforwealthin
随机试题
Ourinformationaboutthepopulationoftheearthbeforethefirstcenturyafter
在地面找平施工中,水泥砂浆体积比和水泥混凝土强度等级应符合设计要求,水泥砂浆体积
关键成功因素法(CSF.包含4个步骤:①识别关键成功因素,②了解企业目标,③识别
Linux系统中,下列关于文件管理命令cp与mv说法正确的是( )。A.没有区
有关伤寒下列哪项叙述是错误的A.肥达反应阳性 B.嗜酸性粒细胞减少或消失 C
根据焊接材料的选用原则,对低碳钢、低合金钢进行焊接,应选用的焊剂为( )。
处方中医师手写的q.i.D.缩写词表示A.每日四次 B.每日一次 C.每日一
简述现代企业人力资源管理各个历史发展阶段的特点。
提出在中国实行“门户开放”政策的帝国主义国家是()。A.日本 B.德国 C.
案例三: 一般资料:刘某,男性,14岁,初中二年级学生。 案例介绍:刘某性格
最新回复
(
0
)