Finally, they designed a powerful weapon.They flled a hollow(空心的) piece of bamboo with the powder. Then they stuffed(填充) arrows(箭) in it. Theseweree the first rockets.That's the way t is with inventions. The inventor gets an idea. As he figures out his invention, he has to ...
These were the first rockets. That’s the way it is with inventions. The inventor gets an idea. As he figures out his invention, he has to try and experiment with different things. And sometimes he gets unexpected results. 1. Which of the following is true? A. Ancient Chinese invented ...
1. Which of the following is true? A.Ancient Chinese invented gunpowder by accident. B.Ancient Chinese invented gunpowder to make rockets. C.Ancient Chinese invented gunpowder to make fireworks. 2. What’s the Chinese meaning of the underlined word “exploded”?
To make the rockets multi-staged, a secondary set of rockets was attached to the shaft, their fuses lighted as the first rockets burned out. Rockets are first mentioned in the West in connection with a battle inItalyin 1380, arriving in the wake of Marco Polo. Not all Chinese scientific ...
Many people believe Henry Ford invented the automobile (汽车). But Henry Ford did not start to build his first car until 1896. That was eleven years after two Germans developed the world's first automobile. Many people believe Henry Ford invented the production line that moved a car's parts...
The modern turbojet engine used today in many British and American aircraft is based on the prototype invented by Whittle. Dr. Hans von Ohain's Continuous Cycle Combustion Concept Hans von Ohain was a German airplane designer who obtained his doctorate in physics at the University of Göttinge...
Jules Verne was a visionary writer who predicted the world's scientific future. Some of his predictions came true during his lifetime, while others remain to be invented. He wrote for a diverse audience, including rich and poor, young and old, scientists and artists. His books, mostly writte...
The rocket exhaust may have been added by a newspaper artist... On the next morning, Swan went ahead with a full-scale test. Again a ground crew got the glider into the air. The glider was equipped with 12 of the 50-pound thrust rockets, enough to boost it to over 50 mph. He rea...
A. The first form of the computer appeared as acalculating machine in France in 1642.B. The analytical machine was invented by Turing in 1822.C. Computers have been used as a means of communicationaround the world since the 1960s.D. Computers haven't been put into space rockets andused ...
a1886年1月29日,德国人KarlBenz发明了世界公认的第一辆汽车。 On January 29, 1886, German KarlBenz has invented the universally accepted first automobile.[translate] ameasure straight along seamline @ top of rib or bttm hem. 直接措施沿肋骨或bttm吊边seamline @上面。[translate] ...