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
The camera is often thought to be a modem invention. But as early 1727, a German physicist 【B1】______ that light darkens silver
The camera is often thought to be a modem invention. But as early 1727, a German physicist 【B1】______ that light darkens silver
admin
2013-03-11
26
问题
The camera is often thought to be a modem invention. But as early 1727, a German physicist 【B1】______ that light darkens silver salt in a chemical 【B2】______ . Using a camera, a big box with a small hole to let the light in, he made 【B3】______ images on the salt. Silver salt is still the 【B4】______ of film today. Then a French scientist made the first 【B5】______ picture by using a special 【B6】______ of metal sensitized with silver salt. A photography he made in 1826 still 【B7】______ . The painter, Daguerre improved on the process 【B8】______ placing common salt the kind we eat on the metal. This was in 1839, 【B9】______ , but the problem was the printing of photographs, and it wasn’t until other scientists developed the kind of paper we now use, that good printing was possible and photograph become truly modem. In 1860, Matthew Bradey was able to take his famous pictures of the American Civil War, 【B10】______ . In the 20th century, George Eastman of the United States simplified film developing, and Dr. Edwin Land invented the so-called "instant" camera with self developing film. 【B11】______ it has taken more than one hundred years for the camera to reach its present condition of technical refinement.
【B6】
选项
答案
piece
解析
转载请注明原文地址:https://kaotiyun.com/show/mau7777K
0
大学英语四级
相关试题推荐
Whilemorepeoplethaneverbeforearelearningforeignlanguagesinpublicand【B1】______institutions,therearethreestriking
A、Shedoesn’twanttohaveitknowntoothers.B、Shedidn’tsaveherfaceintherobbery.C、Shestillcouldnotforgettherobbe
A、Sheoughtnottoworrytoomuch.B、Sheshouldtakecareofherownchild.C、Hetoldhertobemorecareful.D、Hedidnotagree
A、Becausesheiswell-informedwithredfoxes.B、Becausesheoncevisitedtheredfoxnationalpark.C、Becauseshemajorsinani
A、Themanneedstowaitforhalfanhour.B、Thebushaschangedtheleavingschedule.C、Themanwillgototheairportbytaxi.
Asinthefieldofspacetravel,soinunderseaexplorationnewtechnologiescontinuetoappear.Theyshareanumberofsimilari
Allthewisdomoftheages,allthestoriesthathavedelightedmankindforcenturies,areeasilyandcheaply【C1】______toallof
Allthewisdomoftheages,allthestoriesthathavedelightedmankindforcenturies,areeasilyandcheaply【C1】______toallof
Wewillaccomplishnothinginourcareer______.(除非我们对自己有充分的自信)
TheInternetisaninternationalcollectionofcomputernetworksthatallunderstandastandardsystemofaddressesandcommands
随机试题
下述破骨细胞的特点,哪项是错误的
心开窍于舌的主要机理是
发病前有明显的情绪紧张、恐惧、疼痛或站立过久等诱发因素,发作时眩晕昏仆,面色苍白,呼吸微弱,汗出肢冷,舌淡,脉沉细微。治宜选
建设项目中应用价值工程的特点有()。
财务分析的作用是()。
甲公司为增值税一般纳税人,适用的增值税税率为17%。其2015年12月份发生的与职工薪酬有关的业务如下:(1)2015年12月份,甲公司以其生产的成本为0.3万元/台的洗衣机作为福利发放给200名职工,每台洗衣机的市场售价为0.6万元/台;同时将公
下列各项中,属于合理保证鉴证业务的有()。(2020年网络回忆版)
位于中亚地区的里海,蕴藏着丰富的油气资源,据比较可靠的估测,该地区石油最终可开采的总储量为250亿~350亿桶,可与英国的北海油田相媲美,接近世界储量的3%。读“里海周边地区图”,回答问题:里海沿岸共有五个国家,图中序号①和②所代表的国家分别是(
在三棵树上柄息着15只黄鹂和14只白鹭,每棵树上至少有4只黄鹂和2只白鹭,如果每棵树上的白鹭都不比黄鹂多,那么一棵树上最多有多少只鸟?
对n个记录的文件进行快速排序,最坏情况下的执行时间为______。
最新回复
(
0
)