2022年英语专四优秀范文20

2021-11-24 17:43:00来源:网络

  新东方在线专四专八频道给大家整理的相关内容,希望能够对大家的专四专八考试备考有所帮助,更多有关专四专八的备考内容,欢迎随时关注新东方在线专四专八频道。

  Passage 20

  Waves

  How does light get from the sun to the earth? How does music get from the stage to the audience? They move the same way — in waves!

  Light and sound are forms of energy. All waves carry energy, but they may carry it differently. Light and sound travel through different kinds of matter. For example, light waves cannot move through walls, but sound waves can. That is why you can hear people talking in another room even though you cannot see them. The energy of some waves is destructive. An earthquake produces seismic waves.

  Catch a wave. Ask a friend to stand a few feet away from you. Stretch a spring between you. Shake the spring to transfer energy to it. What happens? The spring bounces up and down in waves. When the waves reach your friend, they bounce back to you!

  Light waves travel 300,000 kilometers (186,000 miles) per second! They can also travel through a vacuum. That is why light from the sun and distant stars can travel through space to the earth.

  以上就是新东方在线专四专八频道给大家整理的相关内容,希望对大家有所帮助,更多备考内容,欢迎随时关注新东方在线专四专八频道。


专四专八精选好课 暖心助学

新东方好老师 手把手带学

本文关键字: 专四写作 专四

2020专四专八复习备考必备资料

关注新东方在线服务号回复【专四/专八词汇】

更多资料
更多>>
更多内容

专四专八基础词汇完整版电子资料

关注新东方在线服务号 回复【专四/专八词汇】

更多>>
更多好课>>
更多>>
更多资料