What do you hear? Sounds all round you! You can hear the so

题文

阅读短文，回答问题。     What do you hear? Sounds all round you! You can hear the sound of traffic, the wind in the trees, a dog barking, your own breathing and lots of other things.     But what is sound? Sound happens when something vibrates (振动) or shakes. We can make something vibrate by hitting it. Try this experiment (实验). Put your ruler on your desk so that part of it sticks out (伸出) over the edge. Put your hand on the part of the ruler that is on the desk. Now pull the part that issticking out over the edge down, and then let it go.      The part you let go will vibrate. It will move up and down very quickly, and give out sound. The partof the ruler sticking out over the edge of the desk produced the sound. If you make that part longer, youwill hear a lower sound. When you shorten it, you will hear a higher sound. Why does this happen?      When you shorten the ruler, it will vibrate more quickly. When something vibrates more quickly it produces a higher sound. If you lengthen the ruler, it will vibrate more slowly. When something vibrates more slowly, it produces a lower sound. 1. How does sound happen?     ________________________________________________________2. How can we make something vibrate?     ________________________________________________________3. Can we hear a higher sound or a lower sound if we make the part of the ruler sticking out over the edge     of the desk longer?    ________________________________________________________ 4. What does the word"lengthen" mean in Chine?    ________________________________________________________5. What's the best title of the passage?    _________________________________________________________

题型：未知 难度：其他题型

答案

1.When something vibrates or shakes. 2. By hitting it. 3. We can hear a lower sound. 4. 加长 5. Sounds（答案不唯一）

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解析

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考点

据考高分专家说，试题“阅读短文，回答问题。.....”主要考查你对 [科教类阅读 ]考点的理解。

科教类阅读

科普类的阅读：科普类的阅读理解包含介绍科学知识、社会知识的短文。阅读这类短文时，要以事实为中心进行思考，抓住事物的特征、用途、相互关系等。如果是介绍社会现象的文章，要掌握所谈现象的内涵。

答题技巧：1. 加强整体意识，把握文章的主要内容。在阅读的时候可给段落标上序号，并给重要的句子和   关键词做上记号，尤其是各段中心句，为答题提供更快捷更多的信息源。 2. 审清题干，发觉和把握试题中有效的提示性信息，确认命题的角度、阅读范围和答题方式。 3. 定位阅读，强化对应意识。同时要注意原文利用和自我加工相结合。