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安徽省安庆七中20072008学年度第一学期期中考试

安徽省安庆七中2007-2008学年度第一学期期中考试

高三英语试题出卷人：叶晓明

第一部分：听力（共两节，满分30分）

第一节（共5小题；每小题1.5分，满分7.5分）

听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。

1．Why haven’t the two speakers met recently ?

A.The wan has been abroad for a few weeks.

B.The women has been abroad for a few weeks.

C.The women has been ill for a few weeks

2. What’s the women most probably doing?

A. Reading a newspaper.

B.Buying a new TV set.

C.Watching a movie.

3. What did the women promise to do?

A.Receive some guests.

B.Have a talk with Mr.Scott.

C.Have lunch with Mr.Scott and his daughter.

4. What’s the men doing?

A.Offering help.

B.Giving permission

C.Asking for advice

5. What can we learn from the conversation?

A.They are preparing for a party.

B.The women will buy more plates.

C.The man won’t go to the party.

第二节（共15小题；每题1.5分，满分22.5分）

听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A，B，C三个选项中选出最佳选项，并标在试卷的相应位置。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，每小题将给出5秒钟的作答时间。

每段对话或独白读两遍。

听第6段材料，回答第6~8题。

6．What does the women like best?

A. The downtown area of Ottawa.

B. The downtown area of Montreal.

C.The museums in Ottawa.

7．What does the women think of Ottawa?

A．It’s good for sightseeing. B．It’s good for shopping C．It’s good for excitement

8.What is Ottawa fomous for?

A.Wonderful shops.

B. Great restaurants

C.All sorts of museums.

听第7段对话，回答第9~11题。

9．Who is Mike?

A．The speakers’workmate.

B．The speakers’boss. C. The speakers’father.

10．What are the two speakers talking about ?

A．A job interview. B．The job lay-offs. C．A new job opportunity.

11．How did the two speakers feel about the news?

A．Excited. B．Angry. C．Anxious.

听第8段对话，回答12~14题。

12．What class won’t the women take this term ?

A．English. B.Biology. C. Maths.

13．How does the woman feel about science?

A．She is fond of it.

B．She feels it easy C.She doesn’t like it.

14．What kind of job will the man try to get?

A．Driving a taxi.

B．Working at a gas station. C. Working at a restaurant

听第9段对话，回答第15~17题。

15．What is the big game?

A．A football game between two schools.

B．A football game between two cities.

C．A football game between two states.

16．When will the game begin?

A．At 1 pm B．At 2pm. C．At 3pm.

17．How will the two speakers go to the match?

A．By bus. B．By car. C．On foot

听第10段独白，回答第18~20题。

18. Where did the speaker and his friend spend their summer holidays?

A. In New York .

B.In Florida.

C. In Miami University

19. How long did the flight take the speaker and his friend ?

A.About 2 hours.

B.About half a day.

C.About 3 hours.

20.When did the speaker and his friend go water-skiing?

A.In the morning.

B.In the afternoon

C.In the evening

第二部分：英语知识运用（共两节, 满分45分）

第一节单项填空题（共20小题；每题1分，满分20分）

21．As a reward his contribution botany, Joseph Banks had a flower named him.

A．for, for , for B．for, to, after

C．for, for, after D．of, to, for

22．Australia is an old continuent to which people_______many unique

animals.

A.appeal

B.associate

C.attach

D.apply

23．He’s bad—tempered, selfish, and an unpleasant man.

A．somehow B．altogether C．otherwise D．anyway

24. After a knock at the door, the child heard his mother’s voice _____ him.

A. calling

B. called

C. being called

D. to call

25._______, the football gaim has been decided not to be put off.

A. Heavily as it rained

B.As long as it rainded heavily

C.As it rained heavily

D.Now that it rained heavily

26.If he’s only interested in your looks,that just shows how ____he is.

A.shallow

B.narrow

C.tough

D.serious

27. --- Guess what! I have got A for my term paper.

--- Great! You ______ read widely and put a lot of work into it.

A. must

B. should

C. must have

D. should have

28.The man __charge of the sales section was charged __cheating the company.

A.in, of

B. taking , with

C. in, for

D.took, with

29.Was it on the day ____the People’s Republic of China came into being____ you were born?

A.when, that

B.when, when

C.which, that

D.that, when

30._______, so the young and beautiful girl dared not go home to face her strict parents at all.

A. Having lost her handbag

B. Her handbag having been lost

C. She had lost her handbag

D. Because she had lost her handbag.

31._____by his grandparents in the countryside he isn’t accustomed to ____in the city.

A.Having brought up; live

B.Grown up; living

C. .Growing up; live

D. brought up; living

32. Stop talking at once; the latest news about the 2008 Olympic Games ___.

A. is broadcast

B. has been broadcast

C. would be broadcast

D. is being broadcast

33.Lei Feng didn’t expect anything_____his help.

A.in exchange for

B.in return for

C.in need of

D.in anxiety of

34.When you visit a museum you must ask____permission before taking_____

photographs inside it.

A./; /

B.a; the

C.a; /

D./; the

35. ---It is said that our celebration party of the New Year’s Day will be given up because an important inspection will be given in our school.

---Oh, no! _______.

A. I was looking forward to it

B. I hope so

C. I’m afraid not

D. It doesn’t matter

第二节完型填空（共20小题；每小题1.5分，满分30分）

阅读下面短文，掌握其大意，然后从36至55各题所给的四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

The story goes that some time ago, a man had very lovely little daughter. One day, the man

36 his 3-year-old daughter for 37 a roll of gold wrapping paper. Money was tight and he became 38 when the child tried to decorate a 39 to put under the Christmas tree. 40 ,the little girl__41____ the gift to herfather the next morning and said. “This is for you, Daddy.”

The man was 42 by his earlier 43 , but his anger flared again when he found out the box was 44 . He yelled at her, stating, “Don’t you know, when you give someone a present, there is 45 to be something inside?”The little girl looked 46 at him with tears in her eyes and cried, “Oh, Daddy, it’s not empty 47 . I blew kisses into the box. They are all for you, Daddy.”

The father was crushed. He 48 his arms around his little girl, and he begged for her 49

Only a short time later, an 50 took the life of the child. It is also told that her father kept that gold box by his bed for many 51 and whenever he was discouraged, he would take out a(n) 52 kiss and remember the love of the child who had put it there. In a very real sense, each one of us, as human beings, has been given a gold container 53 unconditional love and kisses …from our children, family members, friends and God. There is simply no other 54 , anyone could hold, more 55 than this. 36．A．asked B．praised C．begged D．punished

37．A．wasting B．stealing C．selling D．holding

38．A．glad B．angry C．sad D．upset

39．A．room B．hall C．box D．ball

40．A．Nevertheless B．But C．Therefore D．And

41．A．bought B．took C．brought D．fetched

42．A．puzzled B．surprised C．scared D．embarrassed

43．A．overwork B．overreaction C．overcoat D．overpass

44．A．empty B．heavy C．full D．wet

45．A．happened B．seemed C．supposed D．used

46．A．down B．back C．up D．forward

47．A．at all B．after all C．above all D．in all

48．A．put B．turned C．handed D．gave

49．A．kindness B．forgiveness C．sadness D．carelessness

50．A．overcoat B．incident C．accident D．action

51．A．days B．months C．nights D．years

52．A．imaginary B．kind C．gentle D．warm

53．A．filled with B．pleased with C．crowded with D．equipped with

54．A．world B．feeling C．possession D．love

55．A．expensive B．precious C．comfortable D．interesting

第三节阅读理解（共20小题；每小题2分，满分40分）

阅读下列短文，从所给的四个选项（A、B、C和D）中，选出最佳选项。

The 2008 Beijing Olympic Games are drawing near. Are you eager to enjoy watching the matches or start serving as a volunteer? First, you need to know about audience manners.

The behaviour of courtside audiences is considered to be an important part of sporting culture. In 2004, after world champion Stephen Hendry lost to Ding Junhui in the China Open Snooker Championships, he complained of the noise from Chinesespectators. Perhaps you and your classmates could discuss how to behave while in the audience at the Olympic Games.

Most sporting arenas have rules for spectators written on the back of the tickets. Read your ticket carefully before you arrive. Try to reach your seat half an hour before the start of the event and don’t leave when a game is in progress. When you leave, remember to take away your soft drink bottles and other trash(垃圾).

During exciting games, try to control yourself. Don’t criticize the performance of players and coaches. Be careful with your words, since some may cause anger among other people in the audience.

Applause is a special form of body language you can use to communicate with players. But you should do it properly. When players first appear, clap your hands together to welcome them, but don’t go on for too long. After an excellent performance, applaud warmly. If someone fails, your applause will help encourage them.

Applause is not welcome, however, while a game is in progress and players need to keep their concentration. Various sports have various rules for the audience.

Enjoying artistic gymnastics requires silence. But lots of cheering can really help basketball and football players. Snooker and table tennis courtside behavior includes a ban on flash photography. Mobile phones are not allowed in shooting centres.

To be a good spectator, you should take time to learn the game-specific rules and related culture of each event.

56. What does the word “spectators”mean in the second paragraph?

A. players

B. audiences

C. coaches

D. organizers

57. What should you do during an exciting game?

A. Control yourself

B. Keep quiet

C. Praise the players

D. Cheer the players

58. When can’t you clap your hands?

A. When players first appear

B. When an excellent performance is over

C. When someone fails

D. When a player is finishing a very difficult performance

59.What is the best title of this text?

A. How to be a good audience of Beijing Olympic Games

B. How to support players at Beijing Olympic Games

C. How to control yourself at Beijing Olympic Games

D. How to be a volunteer at Beijing Olympic Games

Are British people Europeans? This may seem a strange question to Africans and Asians, who tend to think of all white people as Europeans. But the British, when they are in Britain, do not regard themselves as Europeans. The Europeans, to them, are those rather excitable foreigners from the other side of the English Channel, who have never learnt how to speak English. Europe is known as “the Continent”, a place full of interest for British tourists, but also the source of almost all the wars in which Britain has ever been involved. Thus although geographically speaking Britain is a part of Europe, the fact that it is a separate island has made its people feel very, very insular（孤立的）. They feel, and in many ways are, different from the rest of Europe, and they sometimes annoy continental nations by failing to support them, or even to understand them, in time of need.

Where did British people come from? This is an extraordinary interesting question, since they are a mixture of many different races, and all these races invaded（侵略）Britain at different times from Europe. Nobody knows very much about Britain before the Romans came during the first century B. C., but there had been at least three invasions before that. The first of these was by a dark-haired Mediterranean race called the Iberians. The other two were by Celtic tribes: first the Gaels, whose descendants are the modern Scots and Irish, come of whom still speak the Gaelic language; and second the Britons, who gave their name to the whole island of Britain. These were the people whom the Romans conquered. The Romans gave the Britons a good deal of their civilization, but they never settled in Britain in very large numbers, so the British race survived until the overthrow of the Roman Empire by the “barbarians”, i. e. the numerous Germanic tribes which overran the whole of Western Europe.

60．The purpose of the passage is to ______.

A．talk about Europeans

B．discuss the origin of British people

C．argue for the superiority of British people

D．compare the Europeans with Africans and Asians

61．It can be known from the passage that ______.

A．most people think white people are Europeans

B．there are many Africans and Asians living in Europe

C．white men are Europeans in the eyes of Africans and Asians

D．the British people think of themselves as Europeans

62．Why do the British people feel very insular?

A．They are different from those people in the continent.

B．They sometimes fail to support the continental countries in time of need.

C．They are separated geographically from the continent.

D．They are considered very difficult to understand.

63．It can be inferred from the passage that ______.

A．Europeans are those who are unable to speak English

B．those who invaded Britain came from the other side of the English Channel

C．Britain is a place full of interest for those excitable foreigners

D．Britain is the source of almost all the wars in Europe

The traditional tent cities at festivals such as Glastonbury may never be the same again. In a victory of green business that is certain to appeal to environmentally-aware music-lovers, a design student is to receive financial support to produce eco-friendly tens made of cardboard that can be recycled after the bands and the crowds have gone home.

Major festivals such as Glastonbury throw away some 10,000 abandoned tents at the end of events each year. For his final year project at the University of the West of England, James Dunlop came up with a material that can be recycled. And to cope with the British summer, the cardboard has been made waterproof.

Taking inspiration from a Japanese architect, who has used cardboard to make big buildings including churches, Mr Dunlop used cardboard material for his tents, which he called Myhabs.

The design won an award at the annual New Designers Exhibition after Mr Dunlop Graduated from his product design degree and he decided to try to turn it into a business.

To raise money for the idea, he toured the City’s private companies which fund new businesses and found a supporter in the finance group Mint. He introduced his idea to four of Mint’s directors and won their support. Mint has committed around ￡500,000 to MyHab and taken a share of 30 per cent in Mr Dunlop’s business. The first Myhabs should be tested at festivals this summer, before being marketed fully next year.

Mr Dunlop said that the design, which accommodates two people, could have other uses, such as for disaster relief and housing for the London Olympics.

For music events, the cardboard houses will be ordered online and put up at the sites by the Myhab team before the festival-goers arrive and removed by the company afterwards, They can be Personalized and the company will offer reductions on the expense if people agree to sell exterior（外部的）advertising space.

The biggest festivals attract tens of thousands of participants, with Glastonhury having some 150,000 each year. Altogether there are around 100 annual music festivals where people camp in the UK. The events are becoming increasingly environmentally conscious.

64．“Eco-friendly tents”in paragraph 1 refer to tents .

A．economically desirable

B．favorable to the environment

C．for holding music performances

D．designed for disaster relief

65．Mr Dunlop established his business .

A．independently with an interest-free loan from Mint

B．with the approval of the City’s administration

C．in partnership with a finance group

D．with the help of a Japanese architect

66．It is implied in the passage that .

A．the weather in the UK. Is changeable in summer

B．most performances at British festivals are given in the open air

C．the cardboard tents produced by Mr Dunlop can be user-tailored

D．cardboard tents can be easily put up and removed by users

67．The passage is mainly concerned with .

A．an attempt at developing recyclable tents

B．some efforts at making full use of cardboards

C．an unusual success of a graduation project

D．the effects of using cardboard tents on music festivals

Hints on safety

Nearly everyone is attracted to water, whether it be the sea, canals, rivers or the village pond. Beautiful as it is, water should be regarded with respect as it can be dangerous. Around 300 children up to the age of ten die each year from drowning. It should be every parent’s responsibility to ensure that both he and the children swim safely and that as the child gets older, he has some knowledge of life-saving and artificial respiration（人工呼吸）.

The basic rules of water safety are:

－don’t leave small children playing alone in water

－never swim an hour before or an hour after a main meal

－if it’s a danger area, find out before you start swimming where the lifeguard is or where a life-belt is available

－as children get older, try to teach them to remain calm in an emergency

－look out for warning signs to see whether you’re in a danger area （see under this）. Be especially careful of inland stretches of water-pools, reservoirs（水库）and dykes（沟）where there are often fewer people about than at the seaside.

YOU SHOUID KNOW

THE NATIONAL CODE FOR BATHERS－the code deals with warnings that indicate “Unsafe to Bathe”.

1.Colour: red, UNSAFE TO BATHE, do not enter the water.

2.Colour: red board, with lettering. UNSAFE TO BATHE AT ALL TIMES.

Lifesaving equipment is also painted red for easy identification.

3.Colour: red and yellow. PATROLLED（巡逻）BATHING AREAS. Bathing areas with life-saving facilities provided by patrols of lifeguards

4.Colour: black and white check. SURFING（冲浪）AREA. Area set aside for surfing or surfing board riding.

5.Colour: white and blue. The divers’flag means DIVERS DOWN. Boat users keep well clear of this area.

68．What does the writer of this article feel about water?

A．Everyone is attracted to the water in the village pond.

B．It is attractive but dangerous.

C．It is beautiful and respected by everybody.

D．The sea, the canals and the rivers affect the weather.

69．We can infer from the passage that the word “hints”used in the title means “______”

A．Useful advice B．Expert experiences

C．Public comments D．First aid suggestions

70．What does the writer think parents should make sure their children know?

A．How to be able to save his or her own life.

B．How to get knowledge of artificial respiration.

C．How to swim and breathe under water.

D．How to swim safely and how to save other people’s lives if they get into trouble in the water.

71．What is the meaning of the sign below mean?

A．Do not use a surfboard here.

B．Lifeguards patrol this area.

C．This area is not for ordinary swimming.

D．Dangerous animals around.

The way people hold to the belief that a fun –filled, pain free life equals happiness

actually reduces their chances of ever gaining real happiness. If fun and pleasure are equal to happiness, then pain must be equal to unhappiness. But in fact, the opposite is true –more often than not things that lead to happiness involve some pain.

As a result, many people avoid the very source of true happiness. They fear the pain unavoidably brought by such things –marriage, raising children, professional achievements and self –improvement.

Ask a bachelor why he resists marriage even though he finds dating to be less and less satisfying. If he is honest, he will tell you that he is afraid of making a promise. For a promise is in fact quite painful. The single life is filled with fun, adventure and excitement. Marriage has moments,but they are not its most distinguishing features.

Couples with babies are lucky to get a whole night’s sleep or three –day vacation. I don’t know parents who would choose the word fun to describe raising children. But couples who decide not to have children never know thejoys of watching a child grow up or of playing with a grandchild.

Understanding and accepting that true happiness has nothing to do with fun is one of the most liberating realizations. It liberates time: now we can devote more hours to activities that truly increase our happiness. It liberates money: buying that expensive mobile phone or those fancy clothes that will do nothing to increase our happiness now seems pointless. And it liberates us from envy: we now understand that all those who are always having so much fun actually may not be happy at all.

72．What the author is mainly trying to tell us is .

A．a happy life means life full of fun and without pain

B．happiness often goes hand in hand with pain

C．it is important to avoid pain in order to be happy

D．one must know how to gain happiness

73. According to the author, the bachelor resists marriage mainly because

A．he is unwilling to take on family responsibilities

B．he fears it will put an end to all his fun and adventure

C．he believes that dating will be more cheerful

D．he finds more fun in dating than in marriage

74．Raising children, in the author’s opinion, is .

A．a desperate attempt B．a thankless job

C．a rewarding task D．a pain free life

75．To understand what true happiness is, one must .

A．have as much fun as possible during one’s lifetime

B．make every effort to liberate oneself from time and money

C．put up with pain under all circumstances

D．be able to distinguish happiness from fun

第二卷（35分）

第四部分写作（共两节，满分35分）

第一节短文改错（共10小题，每小题1分，满分10分）

此题要求改正所给短文中的错误。此行多一个词：把多余的词用斜线（/）划掉，在该行右边横线上写出该词，并也用斜线（/）划掉。

此行缺一个词：在缺词处加一个漏字符号（∧），在该行右边横线上写出该加的词。

此行错一个词：在错的词下划一横线，在该行边横线上写出改正后的词。

I was a high school student then, from low-income 76．________

family. So I have to work to support my family. My 77．________

first job was to clean the tables in a small restaurant. 78．________

I still remember going there early and felt anxious about 79．________

the new world. I worked harder because I was afraid of 80．________

losing the job. At night, I was sometimes very tired to do 81．________

my homework. And I came to understand that was not 82．________

easy to earn money, and knowledge could change 83．________

my life. So that I learned from the job, in a hard 84．________

way, was much more important as what I earned. 85．________

第二节：书面表达（满分25分）

假如你是高中三年级的学生张明，随着广告业的发展，广告已与我们的生活息息相关。但是广告是利是弊？请根据下列

With the development of advertising, ads have been connected with people’s life. Is it good or bad? We had a discussion.

参考答案

Keys:

1—5 BACCA 6—10 BACAB 11—15CBCAA 16—20 CABCB

18．busiest 19．awfully 20．kindness

21—25 BCBAA 26—30 ACBAC 31—35 DDBAA

36—40 DABCA 41—45 CDBAC 46—50 CAABC 51—55 DAACB

56—59 BADA 60—63 BCCB 64—67 BCCA 68—71 BADA 72—75 BACD

76．from∧--a

77．have--had

78．√

79．felt--feeling

80．harder--hard

81．very--too

82．that∧it/ that--it

83．and∧that

84．that--what

85．as—than

书面表达

One Possible Version:

With the development of advertising, ads have been connected with people’s life. Is it good or bad? We had a discussion. Some people think advertisements don’t tell the fact about the products advertised. Also, they take up too much time on TV and the radio, and cover too much space in newspapers and magazines, which waste a lot of paper. What’s worse, there are some false advertisements that cheat people into buying their things. Therefore, they believe advertisements should be stopped.

Some other people think advertisements can help us make better choices about what to buy by offering us the latest information about various goods. Moreover, many well done advertisements are popular and entertaining, which appeal to the consumers. However, too many advertisements can be annoying. So we should develop advertising properly.

安徽省合肥市蜀山区2018-2019学年七年级数学(上)期末试卷含答案解析

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A．若x=y,则2x=x+y B．若ac=bc,则a=b C．若a=b,则a =b D．若x=y,则2x=2y (★★) 8 . 如果∠1与∠2互为补角，且∠1＞∠2,那么∠2的余角是（） A．∠1B．∠2C．(∠1-∠2)D．(∠l+∠2) (★) 9 . 如图：A.、O、B在一条直线上,且∠AOC=∠EOD= ,则图中互余的角共有( )对. A．2B．3C．4D．5 (★★★★) 10 . 甲乙两地相距180km，一列慢车以40km/h的速度从甲地匀速驶往乙地，慢车出发30分钟后，一列快车以60km/h的速度从甲地匀速驶往乙地．两车相继到达终点乙地，再次过程中，两车恰好相距10km的次数是（） A．1B．2C．3D．4 二、填空题 (★) 11 . 计算：____________ (★) 12 . 单项式的次数是_____. (★★) 13 . 已知关于x，y的二元一次方程组的解互为相反数，则k的值是 _________ ． (★★) 14 . 观察一列数：1，-2，4，-8，16，-32，64，......,按照这样的规律，若其中连续三个数的和为3072，则这连续三个数中最小的数是_______ (★★) 15 . 已知，在同一平面内，∠AOB=30°，射线OC在∠AOB的外部，OD平分∠AOC,若∠BOD=40°，则∠AOC的度数为 _______ 三、解答题 (★) 16 . 计算： (1) (-1) 2020×(-5)+(-1) (2)-2 2+12÷( + - )

初中七年级初一信息技术上下册全册教案.

初中信息技术教案（上学期使用）

第一章：生活在信息社会第1课时信息与信息社会教学内容：信息与信息社会教学目的：了解信息技术的基本涵义和主要特点，知道人们获取信息的基本途径，增强信息意识。教学过程：一、学生看书，并进行实践。二、精讲： 1、信息：人们通常把数据图片、文字、影像等在载体中传递，叫着信息。 2、信息的获取：人们主要用眼及其它感官来获取信息。 3、信息的处理：人工处理机器处理：主要是指用计算机处理。 4、信息社会：三、小结：信息的概念和信息的处理方法四、学生练习：什么是信息？什么是信息技术？第2课时信息技术及其应用：教学内容：信息技术及其应用：教学目的：了解信息技术的基本涵义及其在生产生活中的广泛应用。教学过程：一、学生看书：二、精讲： 1、通信技术的应用 2、微电子技术及其应用 3、电子计算机及其应用

科学处理数据处理实时控制计算机辅助设计和辅助教学办公自动化人工智能多媒体应用网络应用三、小结：各种信息技术的应用四、练习：什么是信息技术？它由那些技术组成？什么是通信技术？电子计算机主要用于那些领域？第3课时信息技术的发展教学内容：信息技术的发展教学目的：了解以计算机技术通信技术为代表的信息技术的发展趋势。教学过程：一、学生看书：二、精讲及板书： 1、计算机的KCB-300发展历程 2、通信技术的发展 3、计算机的发展趋势小型化网络化 4、生物计算机三、小结：计算机的发展趋势四、练习：

1、计算机发展经历了那几代？ 2、计算机向什么方向发展？ 3、我国计算机发展的情况怎样？第4课时信息社会的道德和意识教学内容：信息社会的道德和意识教学目的： 1、了解计算机病毒的特征以及计算机病毒的防治。 2、引导学生遵守网络上的道德规范以及了解学习信息技术的意义与方法。 3、教育学生养成计算机使用的良好习惯。教学重点： 1．计算机病毒的几个特征。 2．计算机病毒的防治。教学难点：计算机使用的良好习惯教学过程：一．导入：同学们一定都生过病，人为什么么会生病，很多情况下是因为感染了病毒。不但人体会感染病毒，电脑也会感染病毒。计算机病毒已经被越来越多的人所知晓，各类媒体对计算机病毒的报道越来越多。同学们一定听说过计算机病毒，计算机病毒会给计算机带来很多危害，下面我们请同学来交流一下你们听说过的病毒以及病毒会给计算机带来一些什么危害。（请同学交流）二．新授：（一）信息安全 1、计算机病毒的特征其实啊，电脑病毒也是一种程序，就像“写字板”“画图”一样，不过“写字板”“画图”可以帮助我们做事情，而电脑病毒只会给我们的电脑搞破坏。刚刚同学们讲了很多病毒以及它们的危害，下面我们一起来总结一下电脑病毒的特征：

安徽省合肥市46中2018-2019学年九年级段考(一模)

安徽省合肥市46中本部2018-2019学年九年级段考（一模）一、选择题（本大题共10小题，每小题4分，满分40分） 1、－3的相反数是（） A. 31 B.3 1 - C.3 D.-3 2、下列运算正确的是（） A.43x x x =? B.32x x x =+ C.2 2 6)3(x x = D.326x x x =÷ 3、2018年我国国民生产总值突破90万亿元，数据90万亿用科学记数法表示为（） A.8 109? B.12 109? C.13 109? D.11 109? 4、如图所示的几何体是由五个小正方体组合而成的，它的主视图是（） A. B. C. D. 5、一元二次方程x x x -=-3)3(的根是（） A.-1 B.3 C.1和-3 D.3和-1 6、为防治雾霾，保护环境，合肥市掀起“爱绿护绿”热潮，经过两年时间，绿地面积增加了21%，设这两年绿地面积的平均增长率是x ，则列出关于x 的一元二次方程为（） A.%2112 +=x B.%21)1(2 =-x C.%21)1(2 =+x D.%211)1(2 +=+x 7、如图，平行四边形ABCD 中，E ，F 分别为AD ，BC 边上的一点，增加下列条件，不一定能得出BE ∥DF 的是（） A. AE=CF B.BE=DF B. C.∠EBF=∠FDE D.∠BED=∠BFD 8、某地区汉字听写大赛中，10名学生得分情况如下表：分数 50 85 90 95 人数 3 4 2 1 那么这10名学生所得分数的中位数和众数分别是（） A. 85和85 B.85.5和85 C. 85和82.5 D.85.5和80