Antifreeze is a liquid(液體) that is added to water to keep it from freezing． When water freezes and turns to ice，it expands(膨脹)．The force of water expanding is so great that it will break the hardest metal．Water is used in car engines(發(fā)動(dòng)機(jī)) to keep them cool while they run，and if this water is allowed to freeze in winter it can break the iron block of the engine．That is why antifreeze is necessary．
Water freezes at 0℃；the usual kind of antifreeze will not freeze until the temperature is－40℃．A mixture(混合物) of five parts of water and four parts of antifreeze will prevent freezing at－18℃；four parts of water and five parts of antifreeze reduce this to －22℃．
Alcohol is a kind of good antifreeze，but when the air is running it becomes hot and the alcohol boils away，so it must be changed very often．Most people use antifreeze that does not boil away when the engine is running．There are several chemicals that do this．One of the most popular is called ethylene glycol．
小題1:people use ________ to keep car engines cool．
A．a(chǎn)ntifreezeB．waterC．a(chǎn)lcoholD．ethylene glycol.
小題2:The usual kind of antifreeze freezes at ________．
A．0℃B．－18℃C．－22℃D．－40℃
小題3:We use antifreeze in order to ________．
A．keep alcohol in water
B．stop ice from becoming water
C．make the freezing point of water lower
D．raise the freezing point of water
小題4:Besides alcohol，________ is another kind of popular antifreeze．
A．waterB．ethylene glycolC．a(chǎn)ny chemicalD．a(chǎn)ny mixture
小題5:The text is written to ________．
A．tell us what antifreeze is
B．make people buy antifreeze
C．tell us that cars need antifreeze
D．show us how to protect car engines

小題1:B
小題2:D
小題3:C
小題4:B
小題5:A
防凍液是一種液體，加入到水中可防止水結(jié)冰。當(dāng)水結(jié)成冰的時(shí)候，它會(huì)膨脹。水膨脹的力很大，可以把最硬的金屬漲破。這就是為什么在冬天汽車的引擎中加防凍液的原因。
小題1:細(xì)節(jié)理解題。根據(jù)文章第一段三，四兩行可知。
小題2:細(xì)節(jié)理解題。根據(jù)文章第一段倒數(shù)第三行，四行可知。
小題3:細(xì)節(jié)理解題。根據(jù)文章第一段倒數(shù)一二兩行可知。
小題4:細(xì)節(jié)理解題。根據(jù)文章最后一段最后一句可知。
小題5:主旨大意題。這篇文章主要講述的是什么是防凍液以及為什么會(huì)使用防凍液。
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：不詳 題型：閱讀理解


“Cool” is a word with many meanings. It means a little cold at first. As time changes, the word gets many different meanings. We can use “cool” when we talk about something wonderful or somebody looking smart. For example. When you see a beautiful and expensive car in the street, you can say, “It is cool.” You may think the popular singer Jay Chow is cool. You can also use the word to mean something new and surprising. Here is an example. One day a teacher took the students to a farm and then asked them to write something about the visit. One of her students just wrote, “The farm is so cool.” Because he thought “cool” was the best word to show what he saw and felt. It also shows some people don’t have enough words. Without “cool”, they seem to have no other words to use. Can you think of any other words like “cool: with so many meanings? If you can they are also very “cool”.
小題1:The meaning of the word “cool” ______.
A．is always the sameB．changes a lot
C．is “wonderful or smart”D．is “new and surprising”
小題2:“You may think the popular singer Jay Chow is cool”. Here “cool” means
A．a(chǎn) little coldB．a(chǎn) little hotC．new and surprisingD．good-looking
小題3:When some people use “cool” everywhere they don’t have other words, the writer seems a little ______.
A．excitedB．happyC．surprisedD．worried
小題4:The best title is _____.
A．Meanings of the word “Cool”B．“Cool”, the Best Word to Use
C．People use “Cool” Too MuchD．“Cool’ Is A New Word

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Dogs are friends of man. They work for us. They hunt with us. They also play with us. But a long time ago, all over the world, dogs were wild. Dogs can go back to the Stone Age. All dogs had the same ancestor (祖先). It is believed that this ancestor was much like a wolf. Other animals, like fox, also came from this ancestor. Thousands of years ago, man began to tame (使馴服) the wild dogs. When the dogs were tamed, they were trained well. The strong dogs then became working animals. They were trained to pull heavy loads (擔(dān)子). They learned to keep watching over sheep and other animals. Working dogs could do other things, too. Some dogs were not strong. But they could help man hunt. Other dogs were best at pets. At first, there were only a few kinds of dogs. Today, there are more than 100 kinds.
小題1:The word “wild” in the first paragraph means ___.
A．溫順的B．野生的C．兇殘的D．善良的
小題2:Dogs can go back to the Stone Age. Here “go back” means ___.
A．追溯到B．回來(lái)C．違背D．返回去
小題3:From this passage, we know that ___.
A．a(chǎn)ll the animals have the same ancestor
B．a(chǎn)ll dogs are as wild as they were many years ago
C．man has helped change dogs
D．a(chǎn)nimals never change
小題4:What jobs can dogs do?
A．Keep watching over sheep.B．Hunt with man.
C．Pull heavy loads.D．All the above.
小題5:The main idea of the whole story is that ___.
A．man and dogs have the same ancestor
B．a(chǎn)ll animals are too wild to be man’s friends
C．dogs and man have been friends for a long time
D．people like to keep foxes as pets because they are tamer

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

This is my beautiful home. There is a small garden in front of my house. There are many beautiful flowers in the garden. Behind my house there is a big tree. Near the tree, you can see a garage. My father’s beautiful car is in it now.
On the first floor, there is a large living room, a dining room, a kitchen and a bathroom. I like watching TV in the living room. On the second floor, there is a small study room and two bedrooms. I love playing with the computer in my study. 
What a nice home! I like it very much.
小題1:There is a small garden       my house.
A．behindB．in front ofC．next toD．a(chǎn)cross from
小題2:There is _______on the first floor.
A．a(chǎn) studyB．a(chǎn) bedroomC．a(chǎn) bathroomD．a(chǎn) computer
小題3:The computer is in the ___________
A．study roomB．bedroomC．living roomD．dining room
小題4:There is ______in the garage.
A．a(chǎn) nice carB．a(chǎn) living room C．a(chǎn) dining room D．a(chǎn) kitchen

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

In recent years advances in medical technology have made it possible for people to live longer than in the past．New medicines and machines are developing every day to extend life．However, some people，including some doctors，don’t agree with these life extending measures, and they say that people should have the right(權(quán)利)to die when they want．They say that the quality of life is as important as life itself，and that people should not be forced to go on living when conditions of life have become unbearable．They say that people should be allowed to die with dignity(尊嚴(yán))and to decide when they want to die．Others don’t agree and say that life under any conditions is better than death and that the duty of doctors is always to extend life as long as possible．And so the quarrel goes on and on without a definite(明確的)answer．
小題1:People can live longer than in the past．It’s because _______．
A．medical technology developsB．we have big hospitals
C．there are many good doctorsD．both B and C
小題2:According to some people whether a dying patient has the right to die is up to__________.
A．the doctorsB．the surroundings
C．his or her familyD．the patient himself or herself
小題3:In the writer’s opinion __________.
A．death is better than lifeB．1ife is better than death
C．neither life nor death is goodD．none of the above
小題4:Why do some patients want to die? Because ________.
A．the doctors are not good B．the conditions are bad
C．life is too hardD．they are seriously ill

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解


It’s important to learn about protecting our environment. Here is a 5R rule for us:
1.  Reduce
If you want to reduce waste, you should use things wisely. Millions of trees are being cut down to make paper. If everyone uses a little paper carelessly and throw it out, soon we would not have any trees left. Other things are also being wasted, and people don’t know what to do with the waste in big cities. So it is necessary to reduce the waste
2.  Reuse
You should always think of reusing the usable things before throwing them out. Give your clothes you do not use or the ones which are too small to the poor. With a family, you may pass on such clothes to younger brothers or sisters.
3.  Recycle
Bottles, cans and paper can easily be recycled. By doing so, we save lots of time and money. For example, coke cans are sent to a factory, where they are smashed flat（壓平）and melted (融化) and the melted things are made for new coke cans.
4.  Recover
When you buy a box of apples, there may be a few rotten（腐爛的）apples. You have two choices: one is to throw the whole apple away, or you could cut off the rotten parts and eat the good parts. In this way, you are recovering the eatable parts of food.
5.  Repair
If one of the legs of your table is broken, you can repair it instead of throwing it away. If you want to change for better ones, It is better for you to sell the old things or give them to other people who can use them after doing some repair. It is true that North America is a “throw-away” society（社會(huì)）. But the time has come to change our way of life so that we can protect our environment. Every one of us should try our best.
小題1:_______ can be recycled.
A．Only hard thingsB．Many thingsC．Few soft thingsD．All things
小題2:The “recover” rule mainly requires us _______.
A．to throw waste things awayB．to cover waste things with earth
C．to get back the useful partsD．to throw the whole things away
小題3:We can infer（推斷） that the writer of this passage may live in _______.
A．ChinaB．JapanC．AustraliaD．America
小題4:Which of the following is true?
A．We will have no resources（資源） of nature unless we can do with the waste.
B．Recycling is the best way to save resources.
C．If we waste less, we can save more resources of nature.
D．More things are wasted in developed countries than in developing ones.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

根據(jù)短文內(nèi)容，判斷下列句子正誤。正確的用“A”表示，不正確的用“B”表示。
Is an earthquake dangerous? Yes, of course. But this doesn’t mean you can’t do anything about it. If you know what to do in an earthquake, you can be safe.
Keep a cool head. Worry may cause bad decisions. Don’t follow others blindly. Think about what you should do. The first several minutes are important.
If you are indoors during an earthquake, quickly move to a safe place in the room such as under a desk or table. Take care of your head. Stay away from windows and things that may fall and hurt you.
If you are in a crowded room and far away from the door, don’t rush to it. You will find too many people trying to escape at the same time. Instead, stay under a desk or table. Don’t use an elevator. You may not get out of it.
Stay in a safe place until you are sure it’s OK to leave. Some aftershocks (余震) may follow an earthquake. These are as dangerous as the earthquake.
If you are in debris (廢墟), try to free your hands and legs. You may make noises by hitting stones. Shouting will make you tired. Try to find some water and food. They are important for you if you aren’t found in a short time. Wait patiently for help.
小題1:Don’t stay near the windows if you are indoors during an earthquake.
小題2:You may not get out if you use an elevator during an earthquake.
小題3:Rush to the door together if you are in a crowded room in an earthquake.
小題4:Keep staying in a safe place until you are sure it’s OK to leave after an earthquake.
小題5:You should keep shouting until others hear you if you are in debris.

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Choose the best answer（根據(jù)短文內(nèi)容，選擇最恰當(dāng)?shù)拇鸢?
Newcastle is beginning to draw tourists from all corners of Europe. It’s one of the fastest developing cities in the United Kingdom. It is said most visitors come here to see the famous soccer team play. The mood of the locals is often changed by the success or failures of the local team.
Newcastle’s most popular place is the Gate. It’s in the center of the city and has many attractions including bars, restaurants, sports bars, pubs and so on. During a home game it becomes a real home to happiness.
Culture and local history lovers can make their dreams come true by taking one of the local city tour buses. They come and leave every few minutes and stop at all the important historical sites in the city. Also the seats and the environment on the buses are comfortable. It’s the best way to see the city without tiring yourself out or getting cold. Places such as the Hancock Museum and Millennium Bridge are must-see attractions. But be careful if you’re short of time, Newcastle is a big place. So you should be prepared to kill a few hours on one of these buses.
If you want to watch the local team play soccer in the St. James Park, remember to book a ticket as early as possible. The locals are crazy soccer fans, and you’ll find it hard to get a ticket if you don’t wait in the queue early.                                                                                 
As you can see, Newcastle is a fantastic city with so much to be offered and so many things to see. You’re sure to have a wonderful time here!                                   
小題1:From the passage we know Newcastle is most famous for its_______.
A．soccer teamB．city restaurantsC．rich cultureD．historical sites
小題2:If you want to learn about the history and culture of Newcastle, you_____.
A．can go to the GateB．can take a city tour
C．must go to St James ParkD．must drive a car
小題3:The underlined word “They” in Para 3 refers to ______.
A．history loversB．historical sites
C．city tour busesD．culture lovers
小題4:Which place is not in Newcastle? ______
A．St. James ParkB．The Hancock Museum
C．the GateD．the Tower Bridge
小題5:What can we learn from the passage?
A．Tourists will enjoy delicious food and have a good time in the Gate.
B．It’s usually easy to get a ticket for a local soccer team play.
C．Many world famous soccer matches are held in Newcastle every year.
D．Newcastle is a very small city with many famous attractions.
小題6:The author wrote this passage mainly in order to_______.
A．introduce the culture and history of Newcastle
B．tell people the popularity of soccer teams in Newcastle
C．introduce the characters of people in Newcastle
D．encourage people to visit Newcastle

查看答案和解析>>

科目：初中英語(yǔ) 來(lái)源：不詳 題型：閱讀理解

Shanghai’s Maglev Train(磁懸浮列車) runs from Longyang to Pudong International Airport(國(guó)際機(jī)場(chǎng)). The whole trip takes about 8 minutes.
Time
First train
Longyang Road station
6:45
Airport Station
7:02
Last train
Longyang Road Station
21:40
Airport Station
21:42
Tickets
 
Economy Class(普通座)
VIP
Single Trip(單程旅行)
50 yuan
100 yuan
Round Trip(往返旅行)
80 yuan
160 yuan
Children at or under 120 cm tall don’t need to buy tickets to take the train, but they cannot take the train by themselves. Children above 124 cm must buy a full-price ticket.
If you buy a round ticket, you can get on the train at Longyang Road Station or Pudong Airport Station, and get off at the other station. The return part of the ticket must be used on the same day.
小題1:How long does it take to travel from Longyang Road Station to Pudong International Airport by Shanghai Maglev Train?
A．About five minutes.B．About six minutes.
C．About eight minutes.D．About nine minutes.
小題2:Mr Wang will buy an Economy class ticket to Pudong International Airport with his 120 cm tall son. He should pay___________ for the trip.
A．50 yuanB．100 yuanC．150 yuanD．200 yuan
小題3:The first train from Airport Station to Longyang Road Station leaves__________.
A．6:30B．6: 45 C．7:02D．7:20
小題4:A passage( 乘客) who buys a round trip ticket__________.
A．can take the train three times
B．must take the train back on the same day
C．can only get on the train at Longyang Road Station
D．can only get off the train at Pudong Airport Station
小題5:A boy who is 130 cm tall__________.
A．can take Shanghai Maglev Train by himself
B．doesn’t need a ticket to take the train
C．has to take the train with his parents
D．can take the train with a half-price ticket

查看答案和解析>>

同步練習(xí)冊(cè)答案