百度试题 结果1 题目was paper invented1Cai Lun in ancient China. A. When; for B. How; with C. Who; by D. What; by 相关知识点: 试题来源: 解析 C 反馈 收藏
百度试题 结果1 题目was paper invented?Cai Lun in ancient China. A. When, B. How, D. Where, C. Who, by for with by 相关知识点: 试题来源: 解析 【答案】C 反馈 收藏
Before that 100 years ago, people write used pens, but pens can leak and it is easy to spill the ink, and it is hard to write on thin or cheap paper with them. One day, John Loud thought that why not use a little ball at the end, so in this way, the first ball-point pen ...
However, if you decide to manufacture the invention and sell it yourself, you will need to continuously market your product. This can be a huge expense. If you don’t have much marketing experience, or aren’t particularly interested in learning, you might prefer to go the licensing route....
200 How was it?-yummy'g by:摇滚我的态度 9516 地球起源(How the Earth Was Made) by:Rooway 844 How You Forget I Was King-Juney Boomdata by:嘻哈有态度 6.6万 Who Was by:Jerry妈妈北京 14.5万 Who Was by:没有你的故事你是谁 8096 Who was by:听友28341257 45.4万 Who Was by:Wendy的音频...
我们能够想象没有纸张和印刷的生活吗?2 Paper was first created about 2,000 years ago in China. After its批事件:invention, peopl e started to writ e on paper to mak e books. In those days, books wer e only produced on e at a tim e by hand. As a result, ther e wer e not many...
How men first learnt to invent words is unknown; in other words, the origin of language is a mystery. All we really know is that men, unlike animals, somehow invented certain sounds to express thoughts and feelings, actions and things, so that they could communicate with each other; and ...
If you weren't glued to your computer screen right now, you might be reading this article on paper from a book; for about 2000 years until the appearance of the World Wide Web, virtually all written information was distributed in printed form. The idea of getting information from inked-up...
The earliest kites were built of wood and cloth. Paper was invented around the year 100 A.D. and was soon used for kites. What makes a kite fly? A kite is pushed up into the air by the wind. Trying flying a kite on a still day, it won’t get very high before it drops back ...
Around 1867, a patent was granted to William Thomson (aka Lord Kelvin) for a device that would have used electrostatic technology to print telegraph messages using ink droplets on a continuous roll of paper tape. Siemens released the first continuous inkjet printer in 1951 for use in medical ...