首页
登录
职称英语
[originaltext] Today, I’ll be talking about the invention of the camera and
[originaltext] Today, I’ll be talking about the invention of the camera and
游客
2023-09-09
73
管理
问题
Today, I’ll be talking about the invention of the camera and photography. The invention of the camera and photography changed our lives a lot. The camera is often thought to be a modern invention. But as early as 1727. (26) a German physicist discovered that light darkens silver salt, a chemical compound. Using as a camera, a big box with small hole to let the light in, (26)he made temporary images on the salt. Silver salt is still the base of film today.
Then a French scientist made the first permanent picture by using a special piece of metal sensitized with silver salt. A photograph he made in 1826 still exists. The painter, Daguerre improved on the process by placing common salt on the metal. (27)This was in 1839, the official date of the beginning of photography, but the problem was the printing of the photographs, and it wasn’t until other scientists developed the kind of paper we now use, that good printing was possible and photograph became truly modem.
(28) In 1860s, Mattew Bradey was able to take his famous pictures of the American Civil War. 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. If we say that photography came into existence in 1839, it follows that it has taken more than one hundred years for the camera to reach its present condition of technical refinement.
选项
A、Light darkens silver salt.
B、Light darkens natural salt.
C、Light darkens silver.
D、Light darkens self-developing film.
答案
A
解析
根据文中“a German physicist discovered that light darkens silver salt, a chemical compound... he made temporary images on the salt. Silver salt is still the base of film today.”德国物理学家发现了一种化学物质银盐,这种物质可以产生显影。由此推断,摄影的基础是银盐的发现。故正确答案为A。
转载请注明原文地址:https://tihaiku.com/zcyy/2999675.html
相关试题推荐
[originaltext]Therearetwokindsofmemory:short-termandlongterm.Infor
[originaltext]Therearetwokindsofmemory:short-termandlongterm.Infor
[originaltext]HenrySmithtaughtscienceattheCitySchool.Oncehewentt
[originaltext]M:Canyoutellmeabouttheuniversityshuttlebussystem?This
[originaltext]Ifwinningiseverything,Britishscientistshavesomeadvice
[originaltext]Ifwinningiseverything,Britishscientistshavesomeadvice
[originaltext]Ifwinningiseverything,Britishscientistshavesomeadvice
[originaltext]Ifwinningiseverything,Britishscientistshavesomeadvice
[originaltext]Scientistssaythatmostdoctorsandpatientsalreadyknowwh
[originaltext]Scientistssaythatmostdoctorsandpatientsalreadyknowwh
随机试题
OnlineEducationIntroductionOnlinecoursesca
[originaltext][13]Atfirst,mostAmericansdidn’tthinktherewasanythingpar
给定关系模式R(U,F,U=(A,B,C,D,E,H)
某建设项目第1年年初一次性投资680万元,基准收益率为10%,基准投资回收期为6
下列关于甲亢危象的防治错误的是A.首选PTU抑制甲状腺激素的合成 B.可以使用
患者,女48岁。咳嗽1周,咳嗽时胸背痛,咳吐大量脓痰,素有便秘,舌苔黄,脉滑数。
共用题干 时先生,现年32,某公司业务经理,年薪5万元。妻子冯女士,某公司文秘
某市土地储备中心拟拍卖一宗位于城市中心区、规划用途为办公的地块。甲房地产开发公司
兹有四个事例:①张某驾车违章发生交通事故致搭车的李某残疾;②唐某参加王某组织的自
下列各项中,属于企业流动负债的有()。A.应收客户的购货款项 B.本期从银行
最新回复
(
0
)