首页
登录
职称英语
[originaltext] The camera is often thought to be a modern invention. But as
[originaltext] The camera is often thought to be a modern invention. But as
游客
2024-05-07
35
管理
问题
The camera is often thought to be a modern 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 tight 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 treated with silver salt. A photograph he made in 1826 still exists. A painter improved on the process by placing common salt the kind we eat on the meal. 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. The good printing was possible and photography becomes truly modern.
In the 20th century, a man from the United States simplified film developing, and another American invented the so-called "instant" camera with serf-developing film. If we say that photography came into existence in 1839, it follows that it has taken more than 100 years for the camera to reach its present condition of technical refinement.
选项
A、An automatic printer.
B、A cheap process of developing film at home.
C、A new kind of film.
D、An "instant" camera that develops its own film.
答案
D
解析
What did another American invent?
转载请注明原文地址:https://tihaiku.com/zcyy/3587476.html
相关试题推荐
[originaltext]Italy’scapitalRomeisafamoustouristattraction,butther
[originaltext]Italy’scapitalRomeisafamoustouristattraction,butther
[originaltext]Therearetwobasicwaystoseegrowth:oneasaproduct,th
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]Facialexpressionscarrymeaningthatisdeterminedbysituat
[originaltext]AyoungmanwholivedinLondonwasinlovewithabeautiful
[originaltext]Elephantslivemostlyongrass,leavesandfruit.Theyalsoe
[originaltext]M:Let’sgoswimmingoveratthestudentcenter.W:I’dliketo,
[originaltext]M:Let’sgoswimmingoveratthestudentcenter.W:I’dliketo,
[originaltext]M:Let’sgoswimmingoveratthestudentcenter.W:I’dliketo,
随机试题
Everyyear,manyChinesestudentsstudyinNewZealand,andover100,000Chinese
Speakingtwolanguagesratherthanjustonehasobviouspracticalbenefitsin
如所示简支梁受荷载作用,已知AB段与CD段长度相同,只受弯矩作用的梁段(纯弯段)
注:平均账面回报率=(账面退出回报-投资总额)/投资总额 下面哪个
下列各项中,不属于营运资金的特点的是( )。A.来源具有多样性 B.数量具有
同时符合下列条件的自然人属于第二类专业投资者:金融资产不低于()万元,或者最近
根据《城乡规划法》的规定,建设单位在取得建设用地规划许可证后,方可向()申
()是指对企业的各种银行账户、会计核算科目、各类库存现金和有价证券等基本财务情
应当先履行债务的当事人,有确切证据证明对方有下列()的,可以中止履行不安抗辩权
一般资料:求助者,女性,61岁,退休工人。 案例介绍:求助者是孤寡老人,最近一
最新回复
(
0
)