Itscomposition: A bow'sdensityandtensile strengthdetermine how much energy it can hold and how well it can return to its original shape when shot. English longbows were often made fromyewwood because it was strong and elastic. Many modern bows arecompositebows, which use different materials in...
Gunpowder(火药) It was one of the greatest inventions.It is said that a Chinese man wrote about how to make it.At first,it was used for making fireworks.At the end of the Tang Dynasty,people began to use it in wars.The method of making it was brought to the Arab...
There are many great inventions in ancient China,such as paper, gunpowder and kites. The firstversion of paper was created in the Xi Han Dynasty but it wasn't widely used because it was too hard towrite on. So Cai Lun improved the method of making it. He made paper from bark, hemp...
It is known that compass was a great gift to the world from ancient China.Before it was invented,sailors had to depend on the stars to find the right direction.After it was invented,the oceans were open to sail.And many discoveries were made with its help. ...
The Great Wall was built in ancient China.It is the world's longest human-made structure, about 6000 kilometers long.Asone of the Eight Wonders in the world, the Great Wall has become the symbol of the Chinese nation(中华民族).A Chinese saying(谚语)goes like this,“ You are not a tru...
was their ingredients. Ancient China did know wheat, but cultivation was extremely limited until the Tang Dynasty, which began in the 7th century A.D. The Lajia noodles, 2,600 years older, were made of two varieties of ground millet: broomcorn millet and foxtail millet. Both kinds were ...
The sect was eventually wiped out by the invading Mongol hordes in 1257, but its legacy would continue centuries later. The development of gunpowder made it possible for martyrs to yield even greater results. Japanese kamikaze pilots used suicide tactics during World War II. Inspired by dedication...
Think of the four great inventions in Ancient China: gunpowder, papermaking, printing an d the compass. These things change d the worl d forever. Then there were the great Western inventions: the steam engine, the telephone an d the radio, . An d now, we fin d ourselves in the great...
The culture of creativity has a long and splendid history in China. China has produced countless inventions and discoveries that have advanced human civilization and benefited human well-being. Some examples are papermaking, printing, gunpowder, compass, porcelain, silk, tea, acupuncture, etc. China...
Historians believe fireworks57(appear) for the first time in ancient China in the second century B.C., when they were made from bamboo stalks and gunpowder that would explode when58(throw) into a fire. They were said to drive away evil spirits. By the 15th century, fireworks had become ...