Ballpoint pens may seem simple and mundane, but each one is the result of more than 100 years of hard work and research by curious individuals, dedicated chemists and business owners. It may not look like much, but the tube of ink inside your pen took decades to refine: It's more compl...
A ballpoint pen is a type of writing implement invented in 1938 by Laszlo Biro. The ballpoint pen represented a significant improvement over fountain pens, which had a tendency to leak and could also fail at high altitudes. Biro's invention was widely used throughout the Second World War, an...
To know what braille feels like, take a ballpoint pen and press hard onto a piece of paper. Now turn the paper over and touch the raised dot made by the pen point. When Lee first saw the dots of the braille alphabet, she wondered if she'd ever be able to read and write them ...
What is this?—It is a ballpoint pen.5个回答 这是什么? - 它是一种圆珠笔。2013-05-23 12:21:38 回答:匿名 这是什么?—它是圆珠笔。2013-05-23 12:23:18 回答:匿名 这是什么?-它是圆珠笔。 2013-05-23 12:24:58 回答:匿名这是什么? —— 这是一支圆珠笔。 2013-05-23 12:26:38 回答:匿...
I have a pen. It writes smoothly. What kind of pen is it? A. Ballpoint pen B. Fountain pen C. Gel pen 相关知识点: 试题来源: 解析 C。中性笔写起来很顺滑。选项 A 圆珠笔,选项 B 钢笔,这两种笔在三年级学生使用中可能没有中性笔那么普遍。
【答案】The ballpoint pen We know that the ballpoint pen is one of the most useful inventions. It was invented by an American tanner named John Lord in 1888. And it is used to help us write faster and make our life easier. It is widely used in many fields. And the price is usually...
Although a lot of inventions are small, they're very useful for people's life. One of my favorite small inventions is the ballpoint pen, which is used for writing. The modern ballpoint pen was invented by Laszlo Biro. While he worked as a reporter in Hungary, he noticed that the ink ...
【答案】The ballpoint pen We know that the ballpoint pen is one of the most useful inventions. It was invented by an American tanner named John Lord in 1888. And it is used to help us write faster and make our life easier. It is widely used in many fields. And the price is usually...
根据下面的表格,以“The ballpoint pen”为题写一篇短文。(80词左右) Who John Lord,an American tanner When in 1888 What to be used for help write faster;make life easier Where to be used in many fields Price low Change become smaller and lighter ...
1. Laszlo Biro invented ___ ballpoint pen. 2. The biggest whale is___blue whale, which grows to be about 29 meters long--the height of ___ 9-story building. 3. I earn 10 dollars ___ hour as ___ supermarket cashier on Saturdays. 4. The teacher asked us ...