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
A、He was a brave soldier. B、He took war photographs. C、He painted portraits. D、He designed a portable camera. B
A、He was a brave soldier. B、He took war photographs. C、He painted portraits. D、He designed a portable camera. B
admin
2010-07-14
75
问题
Today, I’ll be talking about the invention of the camera and photography. The camera is often thought to be a modem invention. But as early as 1727, 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, 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, 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 modern.
In 1860’s, Matthew Bradey was able to take his famous pictures of the American Civil War. In the 20th century, George Eastman of the Untied 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、He was a brave soldier.
B、He took war photographs.
C、He painted portraits.
D、He designed a portable camera.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/sD7K777K
0
大学英语六级
相关试题推荐
A、Itshouldn’tcostalottorepair.B、It’sprobablydifficulttodrive,C、Thewomancouldprobablyfixitherself.D、It’srathe
A、Findsomedriftwood.B、Takesomephotographs.C、Solveamystery.D、Seethecanyon.D对话结束时女生问男生会不会去Arizona,男生的回答是:YoubetIwo
A、Theyspentthreehundreddollarsontheirvacation.B、Theydrewmoneythantheyshouldhavefromthebank.C、Theylosttheirb
Shoulddoctorseverlietobenefittheirpatients–tospeedrecoveryortoconcealtheapproachofdeath?Inmedicineasinlaw
Theterm"FurtherEducation"isthenamegiven,inBritain,toaverybroadanddiverserangeofpost-schooleducation.Someis
EverySundaymorningmillionsofIndianssettledownwithacupofteaandthespecialweekendissuesoftheirnewspapers,just
A、WhethertogiveJoehercamera.B、Ifshecouldtakecareofthecamera.C、Ifitwillbegoodweatherforphotographing.D、Whet
A、Hecanbuymealswheneverhewantsatacheaperprice.B、Hecaneatallhismealsoffcampussothathedoesn’thavetopayth
A、Becauseitisdifficulttomaintainamarriage.B、BecausepeoplelikewatchingTVprograms.C、Becausepeoplepreferfreedomto
A、Havingkidswashthedishes.B、Askingkidstogotobedearly.C、Substitutingphysicalactivityforsomethingkidshate.D、Enc
随机试题
患儿,13岁,耳屏前形成的皮肤盲管,可能是由于
产褥期异常的临床表现是
关于高血压病全身小动脉的病理生理改变,正确的叙述是
关于法的适用,下列表述中不正确的是哪项?()
根据《公开募集证券投资基金运作管理办法》规定的基金分类标准,仅投资于货币市场工具的为()。
真性幻觉的特征有()。
我国《高等教育法》的施行始于()。
一个水池有甲、乙两个进水管,单开甲管8小时注满水池,单开乙管12小时可以注满水池。若两个水管同时开2个小时后,关掉甲水管,还需要多长时间可注满水池?
婴儿用手够不着面包,尝试几次就会放弃。但是过一段时间,婴儿会看看面包,再看看棍子,突然抓起棍子够到了面包。按照皮亚杰的理论,此时个体处于感知运算阶段的()
A、Thepaintingwasmakingfunofpeople.B、ThepaintingwasasymboloftheUS.C、Thepaintingexpressedanunderstandingofpeo
最新回复
(
0
)