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
29
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/2882859.html
相关试题推荐
WhatdidChinesepeopleusuallyhaveforbreakfast15yearsago?[br]Whichoft
[originaltext]WorldEnvironmentDaywasestablishedbytheUnitedNationsGe
[originaltext]TheRedCrossisaninternationalorganizationwhichcaresfor
[originaltext]VisitorstoBritainarealwayscomplainingaboutEnglishfood
[originaltext]VisitorstoBritainarealwayscomplainingaboutEnglishfood
[originaltext]VisitorstoBritainarealwayscomplainingaboutEnglishfood
What’stheattitudemanyAmericanshaveforfleamarkets?[br]Whenpeopleshop
【B1】[br]【B10】[originaltext]Developmentbanksareinternationallendinggro
【B1】[br]【B8】[originaltext]Developmentbanksareinternationallendinggrou
【B1】[br]【B7】[originaltext]Developmentbanksareinternationallendinggrou
随机试题
Ifyouleftyourbookonthetableovernight,youwouldfindthefollowingm
Whenconfrontedwithsuchquestion,mymindgoes______,andIcanhardlyremembe
Fourin10teachershavefacedverbalorphysicalaggression(袭击)fromapu
WhichofthefollowingmaybebannedbyeBayoverseers?[br]Whenyouclickona
Ataneventwherealleyesareonnewcarsfromworld-classdesigners,buddi
知识的掌握和能力的发展是同步的。
关于上颌第一磨牙排列的位置,下列哪一项是正确的A.远中舌尖离开验平面 B.以上
71、根据Q/GDW441,智能控制柜应具备温度、湿度的采集、调节功能,柜内
下列关于员工激励的说法,不正确的是( )。A.任何一种激励方法都不是万能的
个人投资者在证券经纪商处开立证券交易结算资金账户时,必须提交()。A:工作单位
最新回复
(
0
)