What would happen if you tried to blow a soap bubble in freezing weather? Would it freeze solid(固體) and fall to the ground? Would you have to hit it to break it? These questions happened to me on a cold winter day. It was too cold to play in the snow, but it was a perfect time to experiment with blowing frozen bubbles.
To blow frozen bubbles, I used dishwashing soap and a drop of glycerin(甘油) to make it even better. I chose a place out of the wind, and blew bubbles the same way I always do. I watched to see what would happen. Here’s what I learned.
If the temperature is low enough, the skin of the bubbles frosts over (結(jié)霜), becoming cloudy instead of clear. And what about those rainbow swirls(旋轉(zhuǎn)) you see in soap bubbles? The rainbow colors stay even when the bubbles frost, but they don’t swirl anymore. The bubbles still stay in the air. They don’t fall to the ground any faster than they would on a warm summer day.
When these frozen bubbles break, they don’t turn into small water drops as summer bubbles do. They turn into flashing rainbow confetti(碎屑) and move slowly to the ground. Sometimes a frozen bubble will roll across the snow without breaking. If nothing disturbs the bubble, it may stay there for a long time. Sometimes I could catch a bubble and hold it until the heat of my hand made it pop.
I learned another thing about blowing frozen bubbles. It’s so interesting that I want to try it again next year.
小題1:It is the perfect time to blow frozen bubbles on a ___________day.
A.cold winterB.warm springC.hot summerD.sunny autumn
小題2:When the frozen bubbles break, _________.
A.they make a big soundB.they turn into small drops
C.they fall to the ground like rain D.they become rainbow confetti
小題3:The purpose of the passage is _______.
A.to learn how to do a science experiment
B.to show the experiment of blowing frozen bubbles
C.to discover games that are fun to play in the snow
D.to invent a new kind of soap that makes stronger bubbles

小題1:A
小題2:D
小題3:B

試題分析:這篇短文主要介紹了一個(gè)在冬季吹肥皂泡的實(shí)驗(yàn),告訴我們?cè)诙敬捣试砼輹?huì)發(fā)生什么現(xiàn)象.
小題1:根據(jù)第一段but it was a perfect time to experiment with blowing frozen bubbles.描述,可知選A.
小題2:根據(jù)第四段When these frozen bubbles break, they don’t turn into small water drops as summer bubbles do. They turn into flashing rainbow confetti(碎屑)描述,可知選D.
小題3:這篇短文主要介紹了一個(gè)在冬季吹肥皂泡的實(shí)驗(yàn),告訴我們?cè)诙敬捣试砼輹?huì)發(fā)生什么現(xiàn)象,故選B.
點(diǎn)評(píng):本文淺顯易懂,層次分明,學(xué)生很容易把握文章中心內(nèi)容。答題中注意帶著問題閱讀短文,一般就能順利找出答題依據(jù)。對(duì)于不能直接找到根據(jù)的問題注意聯(lián)系上下文,根據(jù)短文中心總結(jié)出正確答案。
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:初中英語 來源:不詳 題型:完形填空

Food is very important.Everyone needs to      well if he or she wants to have a strong body.Our minds also need a kind of food.
This kind of food is    .We begin to get knowledge even when we are very young.Small children are     in everything around them.They learn     while they are watching and listening.When they are getting older,they begin to    story books,science books...,anything they like.When they find something new,they love to ask questions and     to find out the answers.
What is the best     to get knowledge?If we learn   ourselves,we will get the most knowledge.If we are    getting answers from others and do not ask why,we will never learn well.When we study in the right way,we will learn more and understand  .
小題1:
A.sleepB.readC.drinkD.eat
小題2:
A.sportB.exerciseC.knowledgeD.meat
小題3:
A.interestedB.interestingC.weakD.better
小題4:
A.everythingB.somethingC.nothingD.a(chǎn)nything
小題5:
A.lendB.readC.learnD.write
小題6:
A.tryB.haveC.thinkD.wait
小題7:
A.placeB.schoolC.wayD.road
小題8:
A.onB.withC.toD.by
小題9:
A.oftenB.a(chǎn)lwaysC.usuallyD.sometimes
小題10:
A.harderB.muchC.betterD.well

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

任務(wù)型閱讀(共10空, 每空1分,滿分10分)(每空一詞)
What do you think is the most important invention in the world? The TV? The printer? The telephone? Or the computer? A report shows that they are not the only important inventions. Here are three other important inventions.
One of the simplest inventions is the toilet. Before toilets, people poured or dumped waste into rivers from people’s houses. Illnesses were common in big cities, and it was often difficult to find clean drinking water.
Animal food is another important invention. Before the invention, most animals were killed every autumn because there was not enough food for them in winter. After hay(干草) became a kind of common animal food, animals could live through the long winter.
The third great invention is glasses. Glasses help people read, write and do “close work” after the age of 45. Without glasses, the word would be difficult for the people above 45.
                               小題1:      
Some most    小題2:   inventions
Three   小題3:   simple inventions
 Before the inventions
 
The TV
The printer
The     小題4:    
The computer
 
The toilet
Waste     小題5: into rivers from people’s houses. Illnesses were common. It wasn’t often    小題6:  to find clean drinking water.
 
Hay/Animal food
People. 小題7:   most
animals in autumn because there was not much food in winter.
 
    小題8:   
Reading,    小題9:   and
doing “close work” would be difficult for the people who are    小題10:  than 45.
 

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

The Internet, mobile phones and Ipads are part of our lives now. Technology is greatly affecting all ways of our lives, from the ways we work to the ways we play. And it even causes a number of social problems such as cloning humans.
  We have had lots of technology and it has changed our lives a lot. There is no doubt that humans will continue to use more and more technology. Here are some examples of modern technology that will change our ideas and will affect our lives greatly.
  Global positioning system (GPS) (全球定位系統(tǒng))
  It’s a system that uses radio signals from satellites to show exact(精確地) information. It tells you where the user is on the earth in all weather conditions. It’s made up of three parts: satellites, control equipments (設(shè)備) on land and receivers.
  Space Technology
  Russian and American scientists have worked together for the international Space Station (ISS) for a long time. They hope the ISS will provide a long-lasting lab. Such a lab will bring humans limitless(無限的) advantages. It’s even hoped that one day space technology will take humans to their new houses in space.
Underwater Robot
Hercules is a kind of underwater robot with some high technology equipments. It will be used to search for ancient ships which were destroyed into the deep sea during their journey long ago.
The world is changing so quickly that it’s hard for us to catch up with all the new inventions because they seem to come out every month. It’s important for us to learn about new technology and the role that it plays in our lives. So we should be willing to accept modern technology, or we will fall behind the times.
小題1:______ can tell you where the user is on the earth exactly.
A.SatellitesB.Receivers
C.Global Positioning SystemD.Underwater Robot
小題2:According to the passage, which is NOT true about the ISS?
A.It has carried people to other planets.
B.It will provide a long-lasting lab for us.
C.Russian and American are working for it.
D.Humans will get a lot of advantages from it.
小題3:Hercules is used to ______.
A.save lives in the seaB.take picture in the sea
C.repair the broken shipsD.look for the ancient ships in the sea
小題4:From the passage, we know that ______.
A.the use of GPS is affected by the weather conditions
B.it’s very important for us to learn about new technology
C.it’s easy for us to catch up with all the new inventions
D.technology brings us many advantages such as cloning humans
小題5:What is the purpose of the passage?
A.To help us study some new technology.
B.To tell us technology is changing the world.
C.To help solve the problems that technology causes.
D.To remind us the advantages of technology are limitless.

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

Have you ever seen a horse with toes(腳趾)?Millions of years ago, horses had many toes. They had four toes on each front foot. They had three toes on each back foot. The horses were no bigger than the cats.These small horses lived in the forest. The toes helped the horses run on the soft, wet ground.
At first, it was very hot in the forest. But the weather changed. It became very cold. Many trees could not live in cold weather. The trees died and fell. Open fields took the place of forests. The sun made the ground dry and hard.
Horsed began to change, too. They began to get bigger. This took a long time. On the dry, hard land, horses needed only their middle toes for running. Their middle toes became hard. After a long time, horses had only one hard toe on each foot. Now we call this hard toe a hoof.
小題1:How many toes did a horse have millions of years ago?
A.14B.12C.16D.13
小題2:What does the underlined word “hoof” mean in Chinese?
A.尾巴B.馬鬃C.腿D.蹄子
小題3:What was the weather like in the forest at first?
A.Very warmB.Very hotC.Very coldD.Very cool
小題4:Which is WRONG according to the passage?
A.The horses were much bigger than the cats millions of years ago.
B.The trees died and feel because the weather changed.
C.On the dry, hard land, horses needed only their middle toes for running.
D.The horses have fewer toes than before.
小題5:The main idea of the passage is that_______________.
A.horses had three toes on each back foot.B.horses lived in the hot forest
C.horses changed a lot over the yearsD.horses didn’t like the cold weather

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

Held on the second Wednesday of March each year, No Smoking Day helps people across the UK who want to stop smoking. The activity encourages and helps smokers to give up, and publicizes(宣傳) the many sources of help offered to people. Each year over a million smokers take part in the day, while about 40,000 actually give up smoking.
The much-publicized effects of smoking include increased risk (風(fēng)險(xiǎn)) of heart disease, lung cancer and asthma. However, smoking also causes dull skin and wrinkles. The reducedamount of oxygen getting to the skin accelerates (加速)aging, and makes the skin look sallow (病黃色的). And while many smokers believe that cigarettes help them to cope with stress (對(duì)付壓力), scientific research has shown that worry levels actually go down after giving up smoking.
Set a date and time to stop, and keep to it .Talk to your doctor about whether any kind of medicines might suit you.
Find out if there is a stop-smoking health center near you .Try to get the help of your friends and family.
Keep away from situation in which you used to reach for cigarette. If you need to, use nicotine patches (尼古丁戒煙貼片) or gum.
NHS Stop-smoking Centers are all over the UK, providing free services. They have specially trained employees who can advise you on the best way to stop smoking. There are also a number of free national helpline in England, Scotland, Wales, and Northern Ireland, where expert counselors can discuss with you how to give up smoking step by step.
小題1:How many people don’t give up smoking among those who take part in No Smoking Day every year according to the passage?
A.About 1,000,000.B.About 40,000.
C.About 960,000.D.About 1,040,000.
小題2:According to the passage, place the following titles in the correct orders.
A.What are the health risks of smoking?
B.A few tips on giving up smoking:
C.What is No Smoking Day?
D.What help is offered for giving up smoking?
A. a; b; c; d      B. b; a; d; c       C. d; a; b; c       D. c; a; b; d
小題3:Which of the following is Not true according to the passage?
A.No Smoking Day is held on the second Wednesday on March.
B.Smoking can make skin look dull.
C.If you give up smoking, your worry levels will increase.
D.You can get treatment in NHS Stop-smoking Centers for free.
小題4:The underline word “counselors” in the last paragraph probably means _______.
A.nursesB.a(chǎn)dvisersC.employeesD.doctors
小題5: How many tips on giving up smoking are mentioned in the passage?
A.ThreeB.FourC.FiveD.Six

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

Most teenagers feel sad or afraid when their parents fight. They might think their parents don’t love each other any more.
In fact, it is normal for parents to disagree and argue sometimes. They might disagree about important thing like jobs and family decisions. They might even disagree about little thing that don’t seem important at all – like what’s for dinner. Maybe sometimes parents feel so strongly about their differences that it may lead to arguments. However, these arguments are often over quickly. Parents may say sorry and make up , and the family returns to normal
As a family member, you should find out what it really means when your parents fight. When your parents get angry with each other, they might say things they don’t really mean. If your parents are fighting, don’t worry too much about it. Try to find a good way to solve it.
If your parent’s fighting really bothers you, you might find it hard to sleep or got to school. If this happens, try talking to your parents. They may not even realize it until you tell them how their fighting has influenced you. You can also tell other relatives, a teacher or a close friend.
Just remember that no family is perfect and arguments are common in every family.
小題1:What does it mean when parents fight?
A.  They aren’t happy with their family.
B.  They don’t love each other any more.
C.  They disagree with each other about something.
小題2:The underlined part “make up” in paragraph 2 means “      ” in Chinese.
A.  彌補(bǔ)              B.  組成               C.  和解
小題3:The underlined word “it” refers to “     ”.
A.  your parents’ fighting.        B.  your parents’ life      C.  your parents’ difference
小題4:What should we do when our parents’ fighting bothers us?
A.  Talk to them.    B.  Shout at them.       C.  Say something nice to them.
小題5:What can we learn from the passage?
A.  Parents’ fighting often lasts a long time.
B.  Parents might fight over small things.
C.  Teenagers should never argue with their parents.

查看答案和解析>>

科目:初中英語 來源:不詳 題型:完形填空

It is a happy thing for people to have a good body. Do you want to keep   1 ? Exercise often, please. If you usually go to work   2  your car, from now on(從現(xiàn)在起)you should go to work by bike or   3 . If you always get up   4  in the morning and only eat lunch and dinner every day , I think you should   5  the clock to wake(醒) you up early and do some morning exercises   6  , then have your breakfast. Fresh(新鮮的) air and a big good breakfast can make you feel happy. Do you like to eat   7  , for example, potato chips, hamburgers or hot dogs. Of course, they are   8 . But I think you should eat more fruit and   9 . Because they are 10  food. Too much junk food is not good for you .
小題1:
A.fat B.slim (苗條的)C.healthy D.tall
小題2:
A.in B.with C.on D.by
小題3:
A.by car B.by taxi C.by subway D.on foot
小題4:
A.lateB.early C.tiredD.relaxing
小題5:
A.hasB.have C.havingD.to have
小題6:
A.a(chǎn)t homeB.inside C.in the bedroom D.outside
小題7:
A.nice foodB.junk food C.green food D.healthy food
小題8:
A.deliciousB.cheapC.nutrient (有營(yíng)養(yǎng)的)D.bad
小題9:
A.meat B.junk food C.vegetables D.chocolate
小題10:
A.healthB.healthyC.goodD.healthily

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

I live on the twelfth floor of a building. One afternoon I was coming home from a friend's house. It was just after four o'clock. I got quickly into the lift and pressed Button (按鈕) 12.
The lift started to go up, but very slowly. And then, halfway up, it suddenly stopped between two floors. I couldn't understand it. I pressed all the buttons from 1 to 14. I called for help very loudly. But nobody answered.
Then suddenly the lights went out, and I was alone in the dark. I started to cry and beat the walls of the lift. I cried and cried until I had no voice left. Then, I felt hopeless, and pressed all the buttons with my open hands. And all at the same time, there was a bell far away. It rang and rang. It was the fire alarm (火災(zāi)警報(bào)). I thought the whole building was on fire. I said to God quietly, "Just get me out of here. I'll never be bad again."
Just then, I realized the lift was moving very slowly. On the ground floor it stopped, and the doors opened. A man was standing there. "How long have you been in the lift? It is good that you pressed the alarm bell. But haven't you learned to read at your school?" He pointed at a small piece of paper on the wall beside the lift. It said:
"Attention: This lift will be stopped for repairs between 4pm and 5 pm on Thursday March 13."
小題1:What happened to the lift?
A.It had a fire accident.
B.It stopped halfway.
C.It was turned off by the writer.
D.It moved fast up to the top floor
小題2:As the situation went on, the writer became _________.
A.more and more scaredB.calmer and calmer
C.more and more boredD.clearer and clearer
小題3:Why did a bell ring from far away?
A.The lift was to start again.
B.The repair worker rang the fire alarm.
C.The building was on fire.
D.The writer pressed the fire alarm bell.
小題4:Who most probably made the lift move again and go down to the ground floor?
A.The writer.B.The writer's friend.
C.The man.D.The writer's father.
小題5:After reading the paper, the writer realized that he/she had _________.
A.escaped a fire accidentB.made a silly mistake
C.visited a dishonest friendD.pressed a wrong button

查看答案和解析>>

同步練習(xí)冊(cè)答案