最重要的发明.的英语作文

最重要的发明.的英语作文
最重要的发明.的英语作文

最重要的发明.的英语作文
The computer is a useful machine.It is one of the most important inventions.The oldest kind of computer is the abacus,used in China many centuries ago,but the first large and modern computer was invented in 1946.The computer could work out maths problems quite fast.
Now the computers are getting smaller and smaller,and computing faster and faster.Many scientists agree that computers can now do many things,but they cannot do everything.Who knows what the computers tomorrow will be like?Will computers bring good things or bad things to people?The scientists today have to decide how to use the computers tomorrow.
so inventing is the most useful.

B.C., the Chinese already 1324 years will engrave seals, with ink watermark on the documents, printing was the world's first communications media, it can only put material information spread out. Prin...

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B.C., the Chinese already 1324 years will engrave seals, with ink watermark on the documents, printing was the world's first communications media, it can only put material information spread out. Printing was China's four great inventions. We Chinese people from ancient times since using chop, engraved names or titles. Seal is originally ranks of standard job, A.D. 1324 years before, and began to affix the document, Originally used the ink, to the 5th, the sixth century began with red inkpad. Most Chinese seal with soapstone, jade, bamboo even carved ivory. Chinese believe that, for the file by stamp letters and notes with signature more reliable. Now the printed books, the oldest is "diamond sutra", by Chinese king printing, now has into only existing copy. 868 years the Chinese invented the jianyang printing, the diamond sutra "is letterpress, it is a picture scroll, 66 meters with block length, 91 centimeters wide 36 centimeters of containing seal. Later fell on British hands, presently hides in the British museum, London.
1040 China in the lettering workers in Beijing between 1041 throughout the invention of printing, mud hexahedron movable living word-model, heating harden, press the row in rhyme. Turntable When the shop is in type printing have gum rosin, wax on the iron content of such agglutinate, with an iron box around tied, and laid them on the fire heating agglutinate the content, after cooling melting movable stuck right in on the iron. After baking hot iron print out for possible future type used again. Ming LiTaiZong started in north Korea's the earliest metal ZhuZi factory (when north Korea also use Chinese), and over 30 years Korea reference of ancient India Sanskrit, created a set of phonetic alphabet to replace Chinese. Now the important hangul alphabet has 40, need only a letter can spell out all of the word. 1438 years in Germany MeiYin this city Gutenberg lived first xie root eph (German) created a set poured out metal letters type mould. With hard metal carved out of the punch word, reoccupy hammer word to the punch word in soft copper, pressed to produce dies.the, use of dies.the platoon on the frame printing. To the 15th century when probably already beginning to use lead solder alloys. He in 1451 printed Europe's first book with printing type books - "donoghue torsten Ezra d. grammer". About in 1453 began printing Latin bible. He presses is by ordinary spiral squeezing machine boats. Put a page for a plate surface on printing ink, brush on stamp-pad stamp-pad, on the shop paper, with packed in spiral under pressure board pressure. One day to row a page, each hour can seal around 16 slides.
In 1457, foster and shu Mr Buddha invented multi-colour printing and printed out the first book double-color book - Latin holy poetry. Wars, class in the fort by then, woodcarving edition with printing type combine and printed out the first an illustrated book - German fable, were 101 pictures. 147 years French let sen in Venice designed the first batch of Roman type. Spxadition rossana meters in the world map drawn in intaglio printing ", printed, 26 altogether picture copperplate printing. Not easy imitation, on paper, ink of slightly more, easy to summon features distinguishing authenticity, so still used for printing money, stamps and securities, etc. 1501 in Italy in blessing personality out a italics, 1561 years he put these words XiuZhenBen narrow printed books. (western italics mainly used for stressed words). In 1620, the Dutch "jin Mr Invented accept word convenient, printing, printing of 150 per hour. The root 1642 German invented carve intaglio printing method, the most suitable for printing picture, the first picture is German elize countess portrait.
1 years, the Chinese people also invented the color printing. For over 600 years later, seventeen nineteen, Germany's lebron design color printing machine has been patented. Print out the first books is the canvas colour of reconciliation ". In Britain 1727 Scottish goldsmith getter had invented the casting QianBan method. In 1775 French deflecto coporation established measure the size of the type units. 1798 German Hudson natrium anfield invention lithography method, the most suitable for printing illustrations. In 1875 the British first used offset printing method, the image footprinst rubber cloth, then formal seals to elastic of required materials. 1800, Britain's Stan made the first hob greet printer replaces the wooden printing machine. Every hour can print 250 zhang. 1810 germans working in London's binnig gained steam press machine of patent rights (mechanization of manual printing machine), printed 400 pages per hour. 1812 German brother binnig and Bauer designed reverse-force cylinder roller printing machine. The Times sold this machine, each hour can print 1100 zhang. Later elder brother binnig still designed a printer can print sides of each time.
1839 Britain, the United States and Russia three kingdoms were invented electroforming edition. Electricity molten metal plates instead of wood board. 1845 New York lotus Mr Made the first plane practical cycle printing machine patents. Philadelphia the chronicle, buy the machine. 1848 ran in the London times engineer o at staples and exam pearl designed a cycle printing machine, in the newspaper is applied, per hour can print 8,000 zhang. In 1861 American custom made by Hollywood Mr Surface QianBan, from now on a completely round printing layout. In 1852, British photographic technology pioneer talbot discovered the steel wire letterpress principle, 1880 used first this way in New York the illustrated photocopying photograph, entitled "New York slums one scene". In 1886 German muhammad root striving to work in the United States invented the high-speed automatic typographical curator of the whole row machine, Enoch this machine for the New York times. Two years later, the formal operation per hour can row word-model 6,000 or so, speed is the most skilled workers fourfold. In 1887 British civil servants lance meal invented typographical sophisticated mo debbi casting row machine, the machine in 1897 formally put into production. Before this, spxadition ago copper gravure printing method know carving, In 1895 Austrian crick invented photographic gravure method, In 1839, xu cloth around in the U.S. invented photography typesetting. Henceforth printers don't metal type, and convert plate printing instead of traditional letterpress. This method is projected onto the letters successively ZhaoXiangZhi it, then flushing it out, and place them on a page samples. This scans good version used cameras turned clap in metal plate photosensitive membrane, after acid scarification, make this plate has 1798 Hudson natrium to anfield

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