The first bar code was invented in 1948 by Ber- nard Silver. The black and white stripes(条纹) of a bar code represent(代表) a string of numbers. Each number in a bar code is represented by two white stripes and tw
In 1752, Benjamin Franklin tied a key to a kite and flew it in a storm to find out that lightening (闪电) was a form of electricity. In the 1890s, Lawrence Hargrave 8invented (invent) the box kite to test ideas abou flight. From 1898 until 1933, the United States Weather Bureau (...
T:Whenwasthe…invented? S:Itwasinventedin… 课程导入设计导入二情境导入: T:Canyoutellmesomegreatinventionsthatareimportantin ourdailylife? Ss:Yes.Themobilephone,thecomputer,theairconditioner,the fridge,thelightandsoon. T:Yes.Theinventionshavechangedourlife. ...
History of the Piano: Where was the Piano Invented & Who Invented the Piano First? – 1700 When was the piano created and why was the piano invented? About three hundred years ago, toward the end of the Renaissance, there was a harpsichord maker in Italy named Bartolomeo Cristofori. He wa...
The world's most popular version of poker, Texas Hold'Em, was invented sometime around 1925 in a small town called Robstown, just outside Corpus Christi. We don't know the exact year, but we do know that both poker history and the Texas state legislature recognise Robstown as ...
C. To search for the king's treasure. D. To find out the length of the kite string. 解析:细节理解题。 根据第一段“Han Xin,the leader of an army, wanted to bring down a king. He decided to dig a tunnel(隧道) into the king's palace.”可知,韩信挖隧道进入 王宫是为了打倒国王,故...
In 1752,Benjamin Franklin tied a key to a kite and flew it in a storm to find out that light-ning was a form of electricity. In the1890s, Lawrence Hargrave invented the box kite to test ideas about flight. From1898 until 1933, the United States Weath-er Bureau (气象局)used box ...
various types of equipment from dust, dirt, and debris. They are an essential item for any person who wants to protect their belongings, especially for those who work with delicate equipment such as electronics or musical instruments. But what is a dust cover, and when was it invented?
When was it built? 教学目标 1. 学习一些公共场所的标志和说明,要能正确理解,规范自己的行为。 2. 掌握本单元的词汇,特别是一些短语的用法。 3. 进一步复习一些电话用语和电话对话中时态的综合运用。 4. 进一步学习被动语态,特别是一般过去时态的被动语态谓语动词形式,它的肯定式、否定式、疑问式及其答语等。
1. The harp is one of the oldest instruments in the world. It dates back to around 3000 B.C. and was first depicted on the sides of ancient Egyptian tombs