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
2024-03-02
67
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、They devote a lot of time to theoretical problems.
B、They spend most of their time looking through telescopes.
C、They are constantly analyzing data.
D、They often live near observatories.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3499119.html
相关试题推荐
[originaltext]Thelife-savingvalueofsafetybeltshasbeenfirmlyestabli
[originaltext]Thelife-savingvalueofsafetybeltshasbeenfirmlyestabli
[originaltext]Learningthelanguageofacountryisn’tenough.Ifyouwant
[originaltext]Learningthelanguageofacountryisn’tenough.Ifyouwant
[originaltext]Anoblemanandabusinessmanoncemetinarestaurant.Forth
[originaltext]Anoblemanandabusinessmanoncemetinarestaurant.Forth
[originaltext]Baker:Sincesomanyofyouhaveaskedmeabouthowtolearnala
[originaltext]Baker:Sincesomanyofyouhaveaskedmeabouthowtolearnala
[originaltext]M:Hi,Sarah,what’sup?W:Oh,hi.Ijustgotoutofahistoryc
[originaltext]M:Hi,Sarah,what’sup?W:Oh,hi.Ijustgotoutofahistoryc
随机试题
Itisquitenecessaryto______(把我们课堂上学习的东西应用到实践当中).applywhatwehavelearnedi
Mostpsychologistsdeeplybelievethatitisjust______difficulttochangeaper
[originaltext]Ababyspendsthefirstyearoflifelearningtolisten.(9)A
在双代号时标网络计划中,某工作箭线上的波形线水平投影长度表示( )。A.该工作
某公路建设项目施工中发生一起变更,即沥青面层由原来的厚4cm变更为厚5cm。原合
胆囊底的体表投影在:()A、剑突下25cm B、右腋前线与肋弓相交处
克隆羊时,将甲羊的卵细胞去掉细胞核,将乙羊(雄性)耳缘细胞的细胞核植入甲羊的去核
下列哪项不是声誉风险管理体系应当重点强调的内容()A.有明确记载的声誉风险管
甲和乙同为药品批发企业,其所持有的《药品经营许可证》载明的经营范围为麻醉药品、化
初产妇,29岁,妊娠43周,临产10小时。肛查:宫口开大4cm,ROA,胎心17
最新回复
(
0
)