This passage mainly talks about___.A. how the wheel was invented B . how to make people live longer C . some great inventions in the world D .Americans made the first step into space 相关知识点: 试题来源: 解析 C 反馈 收藏
阅读短文,根据短文内容完成下列各题。 Stonehenge is in the south of England. Who built it? How did they build it? Why did they build it ? No one knows. It's a mystery. People built Stonehenge about 5,000 years ago. It is the Stone Age. That's long before the wheel was invented. ...
(a region of the Middle East now largely occupied by Iraq): it's easy to imagine how a potter might have hit upon the idea after repeatedly rotating a stool to work on a pot from different angles. We don't know when the potter's wheel was invented either, but some historians believe...
Rolling it was easier than dragging it. People invented the wheel (2)Getting Started Most designers follow a set of steps to make their ideas happen. Step 1 is defining a problem or need. Some needs are easy to define. A theater puts on a show. Actors act on a lighted stage. They ...
Who invented the wheel? The wheel was invented in the 4th century BC inLower Mesopotamia(modern-day Iraq), where the Sumerian people inserted rotating axles into solid discs of wood. It was only in 2000 BC that the discs began to be hollowed out to make a lighter wheel. ...
The first mass-produced mono wheel— the closest predecessor of the Cyr wheel — was invented in post-war East Germany by Adalbert von Rekowski in the early 1950s [source: Winkler]. Called the Einreifen, the single-wheel apparatus had straps for attaching your feet to the ring and a handl...
The city of Chicago is where the first ever the Ferris wheel was invented in the 1893 World’s Fair. Battle Creek, Michigan makes more cereal than any other city in the world. Montana has three times as many cows than it does people. ...
aYet in the western Hemisphere the wheel was never invented. 在西半球轮子未曾被发明。[translate] a我是一个企鹅,是无敌的。 I am a penguin, is invincible.[translate] amy summer rain~ 我的夏天rain~[translate] awalking with my dogs 走与我的狗[translate] ...
But copying a book took so much time and was so expensive that often only a few copies of each book were made. As a result, usually only a small percentage of the population learned to read and owned books. In 1450, a goldsmith named Johannes Gutenberg in Germany invented the modern ...
There were no gears: the front wheel turned around once each time your legs pushed up and down on the cranks (pedals). Going downhill was pretty tricky (unless you took your feet off the cranks) and going uphill was pretty much impossible! Detail of an original painting, c.1887, by ...