D. Read the passage and answer the following questions（根據(jù)短文內(nèi)容回答下列問(wèn)題）

The world is filled with many interesting sounds. Some are unpleasant to our ears while others are very pleasant to hear. In a single day you probably hear hundreds of different sounds. All sounds are different. Some may be loud. Some are high; others are low. Some sounds are useful. Without sound we cannot talk or listen to one another. The ringing of the alarm clock wakes people up. The hooting of a car warns people of danger.

Some sounds are harmful. When planes fly low over the land, the very loud sounds can damage the houses. Very loud sounds can even make people deaf. We know sound travels about one kilometer in three seconds. In a thunder storm you see the lightning first and then hear the thunder. This is because light travels much faster than sound.

Next time you see lightning, count the number of seconds before you hear the thunder. Divide this number by 3. This will tell you how many kilometers away the thunder storm is.

1.All the sounds in the world are pleasant to hear, aren’t they?

2.What may happen when planes fly low over the land?

3.How fast does sound travel?

4.Why do we see the lightning first and then hear the thunder?

5.What’s your favourite sound in the natural world?

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語(yǔ) 來(lái)源：江蘇省2019-2020學(xué)年八年級(jí)上學(xué)期期末英語(yǔ)試卷 題型：閱讀單選

An old man walked slowly into a restaurant with his cane.（拐杖) His old jacket and shoes made him unusual that day.

A young waitress named Mary watched him move towards a table by the window. She ran to him， and said with a smile，“Here，sir. Let me give you a hand.” Without saying a word， he gave her a smile. She pulled the chair away from the table and helped him sit down. Then she put his cane beside the table so that he could reach it. In a soft and clear voice，he said， “Thank you，miss.”

“You're welcome， sir，” she replied. “I'll be back in a moment， and if you need anything just wave(揮手) at me!”

After he finished a good meal. Mary brought him the change. She handed him his cane， and walked with him to the front door. Holding the door open for him，she said， “Come back and see us，sir!”The old man turned around and smiled.

When Mary went to clean his table，she was very surprised.Under the plate，she found a business card， a 100-dollar bill and a note. The note said，“Dear Mary， I respect(尊重) you very much，and you respect yourself, too. It shows the way you treat others. You finds the secret of happiness.”

In fact，the old man was the owner of the restaurant. That was the first time that she，or any of his waitresses，saw him.

1.The old man looked__________.

A.young B.handsome C.unusual D.common

2.As soon as the old man entered the restaurant，Mary greeted him____________.

A.politely B.slowly C.sadly D.angrily

3.Mary told the old man to_________ when he needed anything.

A.ring the bell B.wave at her C.shout at her D.phone her

4.From the article, we can know the old man was___________.

A.Mary's father B.Mary's neighbour

C.the boss of the restaurant D.a waiter of the restaurant

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：廣東省中山市2019--2020學(xué)年九年級(jí)上學(xué)期期中英語(yǔ)試卷（含聽(tīng)力） 題型：聽(tīng)長(zhǎng)對(duì)話回答問(wèn)題

聽(tīng)對(duì)話,回答下列各小題。

1.What is the man looking at?

A.A menu. B.A book. C.A map.

2.What is the picture show about?

A.Asian culture. B.African culture. C.European culture.

3.Where may this conversation take place?

A.At the museum. B.At home. C.At school.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：上海市 2019-2020學(xué)年七年級(jí)上學(xué)期期末英語(yǔ)試卷 題型：單選題

All the passengers ______ show their passports before getting on the plane.

A.must B.can C.may D.need

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：上海市 2019-2020學(xué)年七年級(jí)上學(xué)期期末英語(yǔ)試卷 題型：單選題

Susan has written a letter to you and she is looking forward to hearing ______ you.

A.from B.of C.over D.about

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：上海市南校2019-2020學(xué)年七年級(jí)（五四學(xué)制）上學(xué)期期中英語(yǔ)試卷 題型：單選題

--Would you please lend me a hand with my heavy suitcase? --_________.

A.Not at all. B.That’s all right. C.Sure. D.Thank you.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：上海市南校2019-2020學(xué)年七年級(jí)（五四學(xué)制）上學(xué)期期中英語(yǔ)試卷 題型：單選題

Please tell him to call me back when he ________ home.

A.comes B.come C.will come D.came

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：2019年陜西省西安市長(zhǎng)安區(qū)中考一模英語(yǔ)試卷 題型：完型填空

第二節(jié): 閱讀下面一篇短文。理解大意, 然后從各小題的四個(gè)選項(xiàng)中選出一個(gè)最佳答案, 使短文連貫完整。

This morning I got an e-mail from Roy, it seemed that my boy really enjoyed his new life at Harvard University. The _______ made me think of the first day when, moved into this house.

Little Roy, around the new house with great excitement and tried to move _______ he could take into the house. Suddenly, his little hand knocked over a bottle of paint on the shelf. The paint made the tidy floor and the white wall a terrible mess. "Oh, my God!" My wife rushed in angrily. I looked at my son _______ I noticed his small face was filled with fear.

I _______ and held his hand. "Take it easy, Roy. Now let's do something to make it look _______ . I took out a _______, "You see, Dad is a magician. I can change it into a big tree. "

His mother soon helped paint some butterflies and flowers on the wall.

We spent the whole afternoon _______ and laughing, the wall became a beautiful forest with plants, birds and small animals. Blue sky and white clouds were also painted by Roy. On that day, everybody in the house knew something _______ happened.

The night before Roy left for Harvard University, he asked me if I still remembered the day when he had knocked over the paint," Since then I've _______ worried about making mistakes," he continued," I believe I can always ________ ways to solve the problems. "

1.A.call B.e-mail C.letter D.card

2.A.who B.when C.where D.what

3.A.and B.or C.so D.but

4.A.cried B.smiled C.shouted D.looked

5.A.nice B.bad C.wrong D.ugly

6.A.drum B.pen C.brush D.clock

7.A.painting B.washing C.cooking D.writing

8.A.dangerous B.boring C.hopeless D.special

9.A.always B.never C.sometimes D.usually

10.A.put out B.hand out C.give out D.find out

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：上海市2019-2020學(xué)年八年級(jí)上學(xué)期第一次月考英語(yǔ)試卷 題型：單選題

________ ancient times, people in different countries wrote numbers ________ many different ways.

A.In…of B.On…with C.In…in D.On…in

查看答案和解析>>

同步練習(xí)冊(cè)答案