单元整体教案NSEFCII-U2017(The first period)
[05-11 15:22:15] 来源：http://www.77xue.com 高二英语教案 阅读：8170次
概要： 2. How the Program Is Broadcast? We turn on the radio and a program comes to us from a broadcasting station miles and miles away. We know that words and music themselves haven’t traveled all that distance through space, but something certainly is bringing the program from the station. 单元整体教案NSEFCII-U02(The first period)由www.77xue.com收集及整理,转载请说明出处www.77xue.com www.77xue.com
单元整体教案NSEFCII-U2017(The first period),标签：人教版高二英语教案,高二英语教案下载,http://www.77xue.com
2. How the Program Is Broadcast?
We turn on the radio and a program comes to us from a
broadcasting station miles and miles away. We know that words and
music themselves haven’t traveled all that distance through space,
but something certainly is bringing the program from the station.
单元整体教案NSEFCII-U02(The first period)由www.77xue.com收集及整理,转载请说明出处www.77xue.com
www.77xue.com What is this silent carrier?
The answer is radio waves. We can not see radio waves or feel
them or even hear them. In fact, nobody knows exactly what they are.
But we do know that they are made by electricity, and we have
learned how to use them.
At the broadcasting station people talk or sing, instruments (乐器)
play, doors slam(砰) ,and all of these make sound waves. The sound
waves reach the microphone, and here they are changed into
electricity. Then from a tall tower called the broadcasting aerial
(天线) ,electricity sends radio waves. The waves travel in every
direction, and some of them reach our radio aerial. Now a wonderful
thing happens. The radio waves start an electricity current (电流) in
our aerial like the one that was first made in the broadcasting
station. Finally, the loudspeaker in our set changes electricity
into sound, and we hear the program.
The First Period
Teaching Aims:
1. Learn and master the following words and phrases:
media, reliable, fire, face, difficulty, elect, go up, burn down,
上一页 [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] 下一页
Tag:高二英语教案，人教版高二英语教案,高二英语教案下载，免费教案 - 英语教案 - 高二英语教案
《单元整体教案NSEFCII-U2017(The first period)》相关文章
- 单元整体教案NSEFCII-U2017(The first period)
- › 单元整体教案NSEFCII-U2017(The first period)
- › 单元整体教案NSEFCII-U2017(The Second period)
- › 单元整体教案NSEFCII-U2017(The third period)
- 在百度中搜索相关文章：单元整体教案NSEFCII-U2017(The first period)
- 在谷歌中搜索相关文章：单元整体教案NSEFCII-U2017(The first period)
- 在soso中搜索相关文章：单元整体教案NSEFCII-U2017(The first period)
- 在搜狗中搜索相关文章：单元整体教案NSEFCII-U2017(The first period)
