You know that balloons must be kept away from sharp objects. They also needed to be kept away from flames. A fire can weaken the rubber and cause it to break. However, in this experiment you will find 题目和参考答案——青夏教育精英家教网—

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You know that balloons must be kept away from sharp objects. They also needed to be kept away from flames. A fire can weaken the rubber and cause it to break. However, in this experiment you will find out how you can hold a balloon directly in a flame without breaking the balloon.

Materials needed:

● two round balloons not inflated(充气的)

● several matches

● water

Inflate one of the balloons and tie it. Place 1/4 cup of water in the other balloon, and then inflate it

and tie it. Light a match and hold it under the first balloon. Allow the flame to touch the balloon. What happens? The balloon breaks, perhaps even before the flame touches it. Light another match. Hold it directly under the water in the second balloon. Allow the flame to touch the balloon. What happens to this balloon? It doesn’t break.

Why does the balloon with no water break in the flame? The flame heats the rubber of both balloons. The rubber of the balloon without water becomes so hot that it becomes too weak to resist the pressure of the air inside the balloon. However, when the balloon with water in it is placed in the flame, the water takes in most of the heat from the flame. Then, the rubber of the balloon doesn’t become very hot, it doesn’t weaken, and the balloon doesn’t break.

Water is a particularly good absorber(吸收者) of heat. It takes a lot of heat to change the temperature of water. On the other hand, when water cools, it gives off a great deal of heat. That’s why areas near oceans or other large bodies of water don’t get as cold in winter as areas at the same latitude(纬度) further inland.

1. From the passage we can know the following aspects of the experiment except______.

A. method B. material

C. result D. time

2.What does the underlined word “resist” in Para 4 probably mean?

A. add B. expand

C. bear D. form

3. When the flame reaches the balloon with water inside, ______

A. the rubber of it doesn’t become hot at all

B. the water in it begins to boil

C. the balloon breaks

D. the heat is mostly taken in by the water

4. The purpose of the experiment described in the passage is to prove that______.

A. water is a particularly good absorber of heat

B. some balloons can be easily broken, while others can’t.

C. balloons without water are not as strong as those with water inside.

D. the temperature is not up to the latitude.

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Dear Sir,

I am writing to express my concern about the plans to build a motorway near our village.

Haldersham is one of the loveliest villages in England. It is peaceful and quiet, and it is situated in a very attractive valley. There are also several beautiful countryside walks in the surroundings, with a view of many rare trees and plants.

Most of the people who live in Haldersham have moved here from other places, often from London and other big cities. They have bought houses here to live in a place far away from the noise and the stress of the big city. They paid a lot of money for their houses, but they knew they would get a high quality of life for it.

If the planned motorway is built, life in Haldersham will change greatly. There will be a lot of noise around us, and nobody will want to go on the walks. House prices will certainly go down, because nobody will want to buy houses in a place close to a motorway. Haldersham will become an ugly place.

I don’t think any of the people living in this beautiful village want that, and we all believe exposure to noise pollution can have a direct influence on our health. So, let’s all tell the politicians who support the motorway plans what we think about them!

Yours faithfully,

Hilary Riley

1.Many people move to Haldersham because ________.

A. it has a good environment

B. it is not far away from big cities

C. they want to be a help to the village

D. they prefer to study rare plants in this area

2.According to Hilary Riley, a motorway will ________.

A. cause high house prices

B. bring people stress

C. provide a convenient life

D. affect the quality of life

3.What’s the purpose of the letter?

A. To give an introduction of Haldersham.

B. To show grateful thanks to the politicians.

C. To express disapproval about the motorway.

D. To offer suggestions on building the motorway.

Reach for the stars at the Euro Space Center. Find out everything you need to know about space — from the origins (起源) of the universe to the future space exploration plans. Light, sound and special effects help to bring your space journey to life. Throughout your tour, our specially trained guides will answer your questions and provide you with any information you require.

Begin your tour with our exhibition about the planets, then move on to the Space Laboratory and see some of the experiments carried out in space. Visit our international space station, where you can climb into our full-scale Space Shuttle model and experience life on board as an astronaut.

You will know all about space by now and to help you further, our Space Center astronaut will tell you about how young people train as astronauts in our own training school. Finally, you can watch our amazing Space Show in our IMAX cinema, which will help you understand everything you have learned during your visit better.

Outside we have an outdoor exhibition including a giant solar system, full-size rocket models and outdoor games. Don’t worry if it rains — much of this is under cover.

After that, why not visit our restaurant Resto Space for food and drink on a space theme? And don’t forget our Space Shop, offering you a lot of gifts to take home.

The Euro Space Center is open every day during school holidays, and also during other times except Mondays. Opening times are 10:00-5:00. For entrance fees, call our booking service on + 32-61-650133. Or you can email us for up-to-date entry information at info@eurospacecenter.be.

1.Anyone who goes to the Euro Space Center will ________.

A. visit there for free

B. become a true astronaut

C. feel as if he was in space

D. do any space experiments he wants

2.In the Space Shuttle, visitors can ________.

A. enjoy food and drink

B. watch an amazing space show

C. learn about space experiments

D. know how astronauts live in space

3.On schoolday Mondays, the Euro Space Center ________.

A. will be open all day long

B. will be open only for 5 hours

C. will be closed for the whole day

D. will have a space show in the IMAX cinema

4.What’s the best title for the text?

A. Learn to be an astronaut

B. Welcome to Space Shop

C. Come and take a space walk

D. Show your talent for science

–Bob, are you free at the moment? I have to ask you some questions.

--______

A. It’s a pleasure B. You’ve got it

C. Help yourself D. Yes, go ahead

Always read the ______ on the bottle carefully and take the right amount of medicine.

A. explanations B. instructions

C. descriptions D. introductions

Writing text messages while walking is dangerous. A study says it is more dangerous than texting while driving. Researchers found that there are more 1. (injury) to texting pedestrians(行人) than there are to texting motorists. Their report says walking is not as easy 2. we think. We must focus on many things at the same time to walk safely in a straight line. The researchers said that people forget how to walk 3.(proper), so dangerous things happen to them. They bump(撞) into walls and other people. They walk into cars, fall over things in the street, 4. even fall into holes.

A professor said walking is a difficult action. There are several reasons 5. texting makes walking dangerous. 6. is that people cannot see the street. Another is that they focus on their phone keyboard instead of their feet. A final reason is that their minds are somewhere else—they are not thinking about 7. (walk) from A to B safely. The professor said over 6,000 people 8. (visit) his hospital last year because of texting. He said 9. worst cases are head injuries. When a pedestrian is tossed into the air he/she has nothing 10. (protect) the head. The damage can be serious.

假如你是李华，请根据以下表中提示给某报社写一封信，谈谈农村儿童失学的主要原因及你的个人看法。

失学原因

1．学费太高，使许多贫困家庭的孩子不得不辍学；

2．许多家长希望孩子能帮助大人早点赚钱；

3．一少部分人认为女孩上学无用。

你的看法

1．儿童是祖国的未来，社会和家长都要重视儿童的学校教育。

2．…… （自拟）

注意：1. 不要逐字逐句翻译；2. 词数在150左右；3. 信的开头结尾已经给出。

Dear Editors,

Now in the countryside, ______________________________________________________

_______________________________________________________________________________

Yours,

Li Hua

Though its economy is speeding fast, China's average family income is far below ________ of the developed countries.

A. itB. thatC. oneD. those

假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有l0处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1．每处错误及其修改均仅限一词；

2．只允许修改10处，多者(从笫11处起)不计分。

A few months after returning the US from Germany, I took a college course in the France. Since I have learned to speak German good in Germany, I thought that it might be interested to begin studying another language.

In the first class, the teacher asked me to do a pronunciation exercise, in which he would say a word or two in French, and each student would do his best to copy. When he got me, he kept having me said more words, but I finally asked him why. "I find it great funs. It's the first time I've heard the American speak French with a German accent." he explained.

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