教學(xué)能手評選課件(編輯修改稿)
2025-08-19 07:17 本頁面
【文章內(nèi)容簡介】 ine that would _______ different sound waves. But the problem is _______ to solve. One day, while he was experimenting with one end of a straw _____ to a deaf man’s eardrum and the other end to a piece of smoked glass. Bell ______ that when he spoke into the ear, the straw drew sound waves on the glass. He thought if sound waves could be reproduced in a moving electrical_______ , they could be sent along a ____ . So the ____ telephone was born. invent original several separate difficult joined noticed current wire first 有一天做實驗 ,他把一根干草的一端和一個聾子的耳鼓膜連接起來，貝爾注意到干草煙熏過的玻璃上產(chǎn)生聲波振動． Para 6: 1).What is his new discovery? How did he discover? ? The tetrahedron shape. ? While searching for a kite strong enough to carry a man into the air, Bell experimented putting triangles together and discovered it. By chance 2).Sentence replacement Because the tetrahedron is very stable, it has proved very useful in the building of bridges. Being very stable, it has proved invaluable in the design of bridges. (四面體 )十分穩(wěn)定牢固 , 在橋梁設(shè)計領(lǐng)域的價值難以估量。 Summary Give the right order according to the text, and the first sentence is given. 1. He was born in 1847 in Scotland. 2. In 1876, he invented the telephone . 3. Bell wrote a letter to his father. 4. He made some other inventions. 5. He sent the first message to his assistant. 6. He invented the microphone. Bell was an inventor all his life. … _____,_____,_____,____,____,_____ 1 6 2 3 5 4 Read the passage aloud. Bell was an inventor all his life. He was born in 1847 in Scotland. He invented the microphone. In 1876, he invented the telephone . Bell wrote a letter to his father. He sent the first message to his assistant. He made some other inventions. Summary Talking bar 說說吧 Do you think it necessary for students to owe cell phones ? Give your opinion and your reasons. Key words: Agree: fashion convenient turn off Disagree: waste money/time break rules interrupt be harmful to ? Some stud
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