10.Gunpowder An explosive Chine invention秘密造句
Gunpowder (huo yao) is another ancient Chine invention. It was invented by accident. More than 1,000 years ago, people experimenting in a pharmacy made the discovery. They found that if sulphur, charcoal and potassium nitrate were mixed together with a certain proportion the mixture would explode.
借物喻人的古诗Gunpowder changed the style of wars. The steel age ended and gunpowder-bad weapons are now widely ud. More than 600 years ago primitive guns were ud in China. Cannon balls were propelled by the thrust of the huo yao explosion. Now, huo yao is also widely ud in fireworks. The splendid fireworks at the Beijing Olympic Games garnered wide acclaim and admiration from the audience.
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11.Paper Chine inventions
Paper, zhi, was a Chine invention. 2,000 years ago, Chine invented paper-making. This zhi was made of silk and was so expensive that only the emperor and aristocrats could
afford to u it. 1,900 years ago, a eunuch called Cai Lun improved the paper-making process. He made cheap jinzhi out of tree bark and rags. The improvement in paper-making spread zhi far and wide, and many different types of zhi were invented by Chine people.Xuan paper, a kind of high quality rice paper, best shows the charm of traditional Chine painting and calligraphy. Jute paper is ud to transcribe Chine classics. Later, Chine zhi spread to the West via the Chine Silk Road. Thousands of years of culture and civilisation were recorded on zhi and pasd to different parts of the world.
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12.Invention of printing党的知识点
A Chine named Bi Sheng invented movable type print around 1,000 years ago. The movable components are cubes made of baked clay. Characters were carved on each piece of clay, which looked like the als widely ud in China. The movable components could be arranged freely to form different vocabularies and ntences.
They were fixed on an iron plate with frames in certain quence. Then ink was painted a
nd a piece of paper was laid down. A printed sheet was created this way. 苹果充电没反应排卵期有几天时间This technique improved the efficiency of printing and transformed traditional transcription into modern printing. Scripts and paintings spread widely in the world with the help of yìn shuā拂面是什么意思.
