人教a版必修5_21數(shù)列的概念與簡單表示法(二)-wenkub
2022-11-29 01:23:07 本頁面
【正文】 ? （ 2）誰發(fā)明了計算機(jī)？ ? （ 3）計算器是用來做什么？ ? （ 4）你認(rèn)為什么是最有用的發(fā)明？ ? （ 5）每天它能夠給人們更多時間工作和玩。 Let’s make up some puzzles Here is a box. You can use it to cook many kinds of delicious food, such as fish, chicken, meat and rice. You can also use it to make cold dish and food hot in a few minutes. Let’s make up some puzzles Here is another box with a beautiful glass face. It looks like a TV, but it isn’t a TV. It can be used for working very fast. It can help you study or work. This little thing has got numbers from 0 to 9. It is very small, so you can put it into your pocket. Wherever you go, you can use it to talk to your friends and your families far away. Here is a big box. It can make your clothes clean and your housework easy. With its help you can have more time to relax or to work . Play a guessing game Was the …invented in…/…ago? The abacus was invented in the sixth century by Chinese people. The umbrella was invented about 4,000 years ago in Assyria, China and Egypt. The binoculars was invented in 1854 by Galileo Porro in Italy. The camera was invented in 1827 by Joseph Nicephore Niepce who took the first picture. The bicycle was invented in 1880s in England. Challenge your thinking What would you do if you are alone on a tiny island? Choose five inventions you would like to have on the island with you. Tell the group what you chose and why. A: I’d like to have some matches because I could light a fire to keep warm. B: Yes, but that’s not going to help you leave the island. I thi
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