大学英语专业四级听力短篇练习：17

　　新东方在线专四专八频道给大家整理的大学英语专业四级听力短篇练习：17,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。

　　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 hem.

　　The energy of some waves is destructive. An arthquake 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! (175 words)

　　Useful Words and Expressions:

　　matter n.物质;内容;事情

　　reading matter阅读材料

　　This is a matter of no account.这是一件无关紧要的事。

　　I have an urgent matter to atend to.我有一件急事要办。

　　I have an important matter to talk to you about.我有件重要的事要和你谈谈。

　　destructive adj.破坏(性)的

　　seismic adj.[地]地震的

　　seismic waves震波

　　bounce v.(使)反跳，弹起

　　bounce back弹回

　　vacuum n.真空立

　　Finding the Direction and Location

　　How can you tell which direction? By day, look for the Sun. It is in the east

　　in the morning and the west in the afternoon. At night, use the Big Dipper to

　　help you find the North Star. It would be better to bring a compass because its

　　needle always points north.

　　How do you know how far you have gone? You could count every step. Each step

　　is about two feet. You’d better wear a pedometer which is a tool that counts

　　steps. If you know where you started, which direction you are heading, and how

　　far you have gone, you can use a good map to figure out exactly where you are.

　　Today there is a new way for travelers to figure out where they are. It is

　　the GPS. It has 24 satellites that orbit the earth and constantly broadcast their

　　positions. Someday you may carry a small receiver as you hike and use GPS to find

　　out if you are there yet! (167 words)

　　Useful Words and Expressions:

　　dipper n.北斗七星

　　compsiss n.罗盘，指南针，圆规 v.包围

　　pedometer n.步数计，步程计

　　head vt.朝向，前进;为首;率领;主持;领导

　　head south向南走去

　　We\'re heading home.我们正朝着家走。

　　Where are you heading for?你往哪儿去?

　　You’re heading for an accident if you drink and drive.如果你酒后开车，势必会

　　发生车祸。

　　Who headed the department?谁主管着这个部门?

　　His name heads the list for the candidates.他是候选人名单上的第一名。

　　Tom headed the ball into his own goal.汤姆把球顶进了自己的球门。

　　figure out v..合计为，计算出

　　GPS abbr. Global Position System全球定位系统

　　orbit n.轨道 vt.绕……轨道而行

　　receiver n.接收器

　　以上就是新东方在线专四专八频道给大家整理的大学英语专业四级听力短篇练习：17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