首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
According to the passage, what do people often think about astronomers?
According to the passage, what do people often think about astronomers?
admin
2013-07-19
74
问题
According to the passage, what do people often think about astronomers?
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/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. (16) The plate is positioned so that the image received by the telescope is recorded on it. (15)Then the image can be developed 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, (17) long time exposures can be made. In this way, objects that are a hundred times too faint to be seen can be photographed by just looking through a telescope.
选项
A、They spend most of their time looking through telescopes.
B、They are constantly analyzing data.
C、They often live near observatories.
D、They devote a lot of time to theoretic problems.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/SKQK777K
0
专业英语四级
相关试题推荐
AccordingtoMr.Bacon,peoplekeepsnakesbecause
InAmerica,olderpeoplerarelylivewiththeiradultchildren.Butinmanyothercultureschildrenareexpectedtocare【C1】____
Howmanypeoplewerekilledaccordingtooppositionsourcesbefore?
Theoldbuildingisinagoodstateof______exceptforthewoodenfloors.
Ahistoricalnovelmaydomorethanmirroringhistory;______futureevents.
WhatcanwelearnaboutPeterfromtheconversation.’?
HowdidtheSouthKoreanForeignMinisterfeelabouttilecurrenttalks?
ToplotShakespeare’slifeistobecomeinvolvedinakindofdetectivestory______thereareplentyofcluesbutverylittleel
Whowastherecentsurveycarriedoutby?
Whowastherecentsurveycarriedoutby?
随机试题
大柴胡汤与小柴胡汤共同含有的药物是
A.越婢加半夏汤B.生脉散合血府逐瘀汤C.真武汤D.苏子降气汤E.补肺汤慢性肺心病。咳喘无力,气短难续,咳痰不爽,面色晦暗,心慌,唇甲发绀,神疲乏力,舌淡暗,脉沉细涩无力。治疗应首选
患者心悸。查体:心律完全不规则,心率快慢不等,心音强弱绝对不一致,脉搏短绌。应首先考虑的是
建设工程组织非节奏流水施工的特点包括()。
财务计划现金流量表反映技术方案计算期各年的投资、融资及经营活动的现金流入和流出,用于计算(),分析技术方案的财务生存能力。
不动产物权的具体内容发生变化时进行的登记称为()。
下列各项税法原则中,属于税法适用原则的是()。
学习与经验影响儿童心理发展的内容和水平,环境与教育的适当性能够为儿童的最佳发展创造条件。
ThetiesymbolizesalloftilefollowingexceptWhichofthefollowingisNOTasocialoccasion?
A、Fromwatchesontheirwrists.B、Fromwatchesoftherich.C、Fromclocksintheshops.D、Fromclocksinthesquares.D
最新回复
(
0
)