Before the handy ballpoint, getting a few sentences onto paper was a pretty involved task. Find out how the ballpoint pen stores and manages its own ink supply to make writing a snap.
Because the tip of a normal ballpoint pen is so tiny, it is hard to visualize how the ball and socket actually work. One way to understand it clearly is to look at a bottle of roll-on anti-perspirant, which uses the same technology at a much larger scale! The typical container of ro...
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从下面各题所给选项中,选择最佳选项。 —How does the ballpoint pen work? —There was a tiny ball at the tip of the pen. The ball ___ ink into paper as it ___.`roll; move`, `rolled; moved`, `rolls; moves`, `rolling; moving`相关知识...
While the idea of a ballpoint pen had been around for many years, it took three different inventors and almost 60 years to develop this modern writing instrument. The first patent for this invention was issued on October 30, 1888, to a man named John J. Loud. His ballpoint pen consisted...
Ballpoint pens are as much a part of modern life as the act of writing itself. We use them constantly, from signing delivery slips to making grocery lists to taking notes in chemistry class. When a ballpoint pen gives you trouble, there are many potential reasons. But knowing how to proper...
Sewing, DIY tutorials, art, and how to organize your studio How to Make a Stuffed Dinosaur (with free printable pattern!) Every kid needs a stuffed dinosaur to vanquish their enemies. I’ll show you how to make a t-rex toy for a special tiny person in your life! The dinosaurs also ...
写作提示:这篇书面表达要求学生根据表格内容写一篇与圆珠笔发明相关的文章。学生需要仔细阅读表格,清楚表达圆珠笔的发明者、发明时间、优缺点及使用领域。要求要点之间衔接自然,信息表述明确清楚,表述方式多样。How was the ballpoint pen invented?We know that the ballpoint pen is one of the most usefulinventions. ...
How to get ballpoint pen out of clothes using baking soda Bicarbonate of soda is another natural ink remover. Follow these steps: 1 Create a paste by mixing equal parts baking soda and vinegar. 2 Apply the paste onto the biro stain and let it sit there for about ten minutes. ...
C.The first ballpoint pen in the world got a great success. 相关知识点: 试题来源: 解析 (1)B.细节理解题。根据第二段While working,he noticed his fountain pen was too much trouble .He had to fill it with ink from time to time.可知加墨水的钢笔必须不停地加墨水,即墨水经常用完,故选B。(...