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
30
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
WhatdowelearnaboutBillfromthisconversation?[br][originaltext]W:Howi
Complainingaboutfaultygoodsorbadserviceisnevereasy.Firstofall,c
设备工程监理单位提供的监理服务一般由()构成。A.检验服务 B.测试服务
测定半刚性基层透层油的渗透深度时,不正确的做法是()。A.在透层油基本渗透或喷洒
佝偻病脾虚肝旺证治法为A.健脾益肺,调和营卫 B.健脾助运,平肝息风 C.健
关于证券组合的有效边界,下列说法不正确的是()。 Ⅰ.有效边界是可行域
下列疾病中,血小板可增多的是A.再生障碍性贫血 B.脾功能亢进 C.慢性粒细
健康正常人的CD/CDT细胞的比值为A.1.7~2.2B.≤1.0C.3~5D.
患者,男性,27岁,吸入有害气体致呼吸困难,双肺大量湿啰音,查血气分析:PaCO
施工质量事故在处理过程中通常需进行如下工作:①事故的原因分析;②事故处理;③制定
最新回复
(
0
)