阶段综合检测2

阶段综合检测2
阶段综合检测2

阶段综合检测(二)

(时间:100分钟;满分:120分)

Ⅰ.阅读理解(共15小题;每小题2分,满分30分)

阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。

A

Welcome to Medellin,Colombia

Climate—Medellin is about 1,538 meters above sea level.Its climate is not as hot as other cities located near the equator (赤道).The city's average (平均的) temperature is 22 ℃.

Getting here—Medellin has an international airport,with flights (航班) from Miami,New York,Madrid,and many other cities.There are taxis and minibuses from the airport to downtown Medellin.

Getting around—The quickest and cheapest way to get around Medellin is with the well-planned metro (地铁) system.The modern Turibus also goes around the city,showing parks,beautiful neighborhoods,and historical sites.

Where to stay—There are many cheap hotels,and most of them include hot showers,TV,free Internet,private lockers,and Spanish lessons.

Shopping—Medellin is only a few hours from the coffee-growing centers of Colombia.Coffee can be bought as a great gift.Medellin is sometimes called the textile (纺织品) capital of the country,but it is not the best place to shop for clothes.

Nightlife—The fun-loving people of Medellin love to dance.There are many places around the city to dance.One of the most famous is the Zona Rosa.Most clubs close at 3:00 a.m.

Sightseeing—There are world-famous museums in the city,but one place that you have to visit is the Museo de Antioquia.It has a large collection of art,including paintings by Fernando Botero.

Festivals—Why not plan a trip around a festival?There's a poetry festival in July,a celebration of lights in December and January,and for two weeks in August,a flower festival—the city's most important cultural event.

【语篇解读】本文是应用文。文章介绍了四季如春的哥伦比亚第二大城市——麦德林。

1.How is the climate of Medellin?

A.It is pleasant.B.It is very hot.

C.It is quite dry. D.It is changeable.

A[细节理解题。根据Climate中的“Its climate is not as hot as other cities...average temperature is 22 ℃”可知,麦德林的平均气温保持在22度,所以它的气候宜人。]

2.What can we learn about the Museo de Antioquia?

A.It is an art market.

B.It is a must-see museum.

C.It is the best place to shop.

D.It is a coffee-growing center.

B[细节理解题。根据Sightseeing中的“There are world-famous museums in the city,but one place that you have to visit is the Museo de Antioquia”可知,Museo de Antioquia是到麦德林必去的一个博物馆。]

3.When is the flower festival in Medellin?

A.In July. B.In August.

C.In January. D.In December.

B[细节理解题。根据Festivals中的“and for two weeks in August,a flower festival”可知,麦德林的鲜花节是在八月举行。]

B

Mike Hayes of Rochelle,Illinois,proved he was smart in his first year at college.In 1987,while he was a student in the first year of the University of Illinois,he had gotten $2,500 from a job working at a store,but that money would not go far to pay the four years of tuition (学费) and college expenses that added up to around $28,000.His middle-class family had already put his older brothers through

college.While Mike's parents would have helped him to pay,Mike decided he did not want his parents going into debt for him.He came up with an idea to solve this problem.

Mike wrote to Chicago Tribune writer Bob Greene.He wanted each of the newspaper's readers to send him a penny (分).Greene thought the idea sounded fun and agreed to do it.He shared Mike's letter with his readers on September 6,1987.

“Just one penny,”Mike said.“A penny doesn't mean anything to anyone.If everyone who is reading your reports looks around the room right now,there will be a penny on the corner of the desk,or on the floor.That's all I'm asking.A penny from each of your readers.”

In less than a month,the Many Pennies for Mike fund (基金) had around $23,000.Donations (捐款) were received from every state in the United States,and even Mexico,Canada,and the Bahamas.So,Mike achieved his $28,000 goal and went on to learn food science from the University of Illinois.

In the end,Mike had this to say about the whole thing,“I just want to express my thanks to everyone...right now I'm feeling that the world is a pretty great place.”

【语篇解读】本文是记叙文。文章讲述了Mike为了解决他的大学学费及生活费的问题通过报社向陌生人寻求帮助,并最终如愿以偿的故事。

4.What troubled Mike when he was in his first year at college?

A.He couldn't afford his tuition.

B.He failed to find a part-time job.

C.His parents were unwilling to help.

D.His parents had huge debts to pay off.

A[细节理解题。根据第一段中的“he had gotten $2,500 from a job...and college expenses that added up to around $28,000”可知,Mike负担不起他自己的大学学费及生活费。]

5.Why did Mike write to Greene?

A.To ask for help.

B.To send his greetings.

C.To express his thanks.

D.To introduce himself.

A[细节理解题。根据第二段中的“Mike wrote to Chicago Tribune writer Bob Greene.He wanted each of the newspaper's readers to send him a penny”可知,Mike 写信给Greene是为了让Greene的读者给他捐钱,因此Mike是在寻求帮助。] 6.What can we infer from Paragraph 4 about Mike?

A.His fund needed more donations.

B.He became rich and successful.

C.His plan really worked.

D.He asked for too much.

C[推理判断题。根据第四段中的“Mike achieved his $28,000 goal and went on to learn food science from the University of Illinois”可知,Mike筹集了28,000美元,费用问题解决了,他可以继续完成学业,由此可知他的计划成功了。] 7.What's the best title for the text?

A.Pennies for readers

B.The value of education

C.Mike's business in college

D.The one penny college fund

D[标题归纳题。Mike为完成大学学业向报社求助,希望报纸的读者每人给他捐助一分钱。所以文章的关键词是one penny,college,fund。故D项符合主旨大意,适合作标题。]

C

It's early morning,and Katie Smith hears a rooster crowing (报晓).It's time to get up and start working.She and her husband,Chris Cashen,start the day early.They own and run the Farm at Miller's Crossing,in Hudson,New York.

With the help of 10 workers and,sometimes,the Cashen kids—Lael,12,Connelly,10,AnneMae,8,and Christopher John,6 —Smith and Cashen harvest

crops during much of the year.They grow vegetables and other plants.They also raise and care for some animals.

Because the Farm at Miller's Crossing grows different kinds of crops,Cashen says the biggest challenge (挑战) is timing.Several times a year,workers prepare the soil and plant crops.At other times,they transfer (转移) plants from the greenhouse into the fields.The farmers store the fall vegetables in coolers and sell them throughout the winter.

Cashen and Smith grow their crops without the use of chemicals.When crops are ready to be harvested,workers pick them daily,wash them,and put them in boxes.In June,they work up to 70 hours a week.As fall nears,workers try to finish the daily harvesting while there is still daylight.The crops are sold through programs that provide buyers with fresh produce weekly.

Living on a farm has its perks.The Cashen kids swim in a river from which the crops get their water.They ride their bikes in wide-open spaces.When harvesting tomatoes,they sometimes have exciting tomato fights.They have a big family with which to share their adventures.

Everyone takes part in the business.The kids feed the horses.The boys care for the https://www.360docs.net/doc/d83446573.html,el says she likes transferring plants and selling produce.“It's fun and really busy,”says Lael,“but it's just a part of life.”

【语篇解读】本文是说明文。文章介绍了Cashen一家人在农场上的生活。

8.What can we learn about the Cashen family?

A.They look needy.

B.They lead a busy life.

C.They live on selling animals.

D.They do all the work on their own.

B[推理判断题。根据第一段中的“It's early morning,and Katie Smith hears a rooster crowing.It's time to get up and start working”及第二段中的内容可知,Cashen一家在农场上过着忙碌的生活。]

9.What's the most difficult thing on the Farm?

A.Storing the fall vegetables.

B.Growing crops as fast as possible.

C.Moving plants out of the greenhouse.

D.Planning when to plant and harvest.

D[细节理解题。根据第三段中的“Cashen says the biggest challenge is timing...plants from the greenhouse into the fields”可知,对于Cashen一家来说最大的挑战就是如何合理安排农场上各项工作的时间。]

10.What does the underlined word “perks” in Paragraph 5 mean?

A.Price. B.Reasons.

C.Discomfort. D.Advantages.

D[词义猜测题。根据第五段中的“The Cashen kids swim in a river...they sometimes have exciting tomato fights”可知,Cashen家的孩子们在农场的活动非常丰富,他们玩得很开心,由此可知这是住在农场的好处。]

11.What is Lael's attitude toward her life on the Farm?

A.She enjoys it.

B.She is proud of it.

C.She is uninterested in it.

D.She feels unsatisfied with it.

A[推理判断题。根据最后一段中的“Lael says she likes transferring plants and selling produce.‘It's fun and really busy,’”可知,Lael喜欢农场上的生活。]

D

Anybody who has a long daily commute (通勤) knows the feeling of sitting in traffic with nothing to do but wait.Now,a study suggests that long commutes can take away more than just valuable time,they also have a bad influence on your fitness (健壮) and health.

Earlier research has connected longer commutes with obesity.But this new research is believed to be “the first study to show that long commutes can reduce

exercise time,”explained lead researcher Christine M.Hoehner of Washington University in St.Louis.

Long commutes are connected with “higher weight,lower fitness levels and higher blood pressure (血压),all of which are likely to lead to heart disease,”she said.One discovery that Hoehner found a little surprising was how “being caught in heavy traffic can lead to higher blood pressure.”

Here's how the research was done:Scientists studied 4,297 locals from Austin,Texas.They recorded their commuting distances,body mass indices (体重指数) and blood pressure.The locals reported their physical activity for the last three months.

What did scientists learn?Commuters who said they drove longer distances also reported they took part in less active physical activity.They had lower fitness levels,greater body mass indices and higher blood pressure.

Between 1960 and 2000,workers commuting in private cars jumped from 41.4 million to 112.7 million,according to the U.S.Department of Transportation.And as suburbs (郊区) have spread across the nation since the 1950s,commuter miles have increased too,along with the time drivers spend sitting in the car,according to the U.S.Census Bureau.

For many commuters,moving closer to work isn't a choice but Hoehner said there are ways that can lead to more exercise.“Commuters should find ways to work physical activity into their workdays by doing things like walking during work breaks.Employers could also help by encouraging fitness breaks,”said Hoehner.

【语篇解读】本文是说明文。一项新的研究表明交通拥堵会影响身体健康。

12.What did Hoehner find?

A.The longer the exercise time,the better.

B.Some diseases lead to higher blood pressure.

C.Lower fitness levels result from heart disease.

D.The busier the traffic,the higher the blood pressure.

D[细节理解题。根据第三段中的“being caught in heavy traffic can lead to higher blood pressure”可知,严重的交通拥堵会导致血压升高。]

13.How did scientists do the research?

A.By doing a simple test.

B.By collecting information.

C.By giving physical checks daily.

D.By talking to locals face to face.

B[细节理解题。第四段中讲到科学家会记录通勤距离、体重指数、血压和锻炼情况等,可见他们主要是通过收集信息来完成研究的。]

14.What has happened since the 1950s?

A.The area of suburbs has reduced.

B.The number of commuters has dropped.

C.Many people have given up driving cars.

D.Many people have moved farther from workplaces.

D[细节理解题。根据倒数第二段中的“as suburbs have spread across the nation since the 1950s,commuter miles have increased too”可知,20世纪五十年代以来,人们的通勤距离更长了。]

15.What is Hoehner trying to do in the last paragraph?

A.Offer help.B.Give advice.

C.Find excuses. D.Send warnings.

B[推理判断题。最后一段中作者说到通勤人员应该在工作间隙多走动,雇主应该创造机会让员工多运动,这是从两方面给出的建议。]

Ⅱ.阅读七选五(共5小题;每小题2分,满分10分)

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Why camp is great for children

If you've been to camp,you're not surprised to hear about the advantages of summer camp.Here is a list of the most important reasons to send your kids to camp.

At camp,children:

Make true friends—Camp is the place where kids make their very best

friends.Free from the social expectations pressuring (对……施加压力) them at school,camp encourages kids to relax and make friends easily. 16 Every day,friendships are created.

Learn social skills—Coming to camp means joining a community where everyone must agree to work together and respect each other.When they live in a small room with others,kids solve problems,and see the importance of open communication. 17

Grow more independent—18 Managing their daily choices in the safe,caring environment of camp,children welcome this as a chance to grow in new directions.Camp helps kids develop who they are.

Experience success and become more confident— Camp helps children build self-confidence.With its non-competitive activities and different chances to succeed,camp life really improves young people. 19 Camp teaches kids that they can.

Spend their day being physically active—As children spend so much time these days inside and mostly sitting down,camp provides a wonderful chance to move.

20 Camp is action!

A. Camp builds teamwork.

B.There's achievement every day.

C.Running,swimming,jumping,climbing!

D.All the fun at camp draws everyone together.

E.It is easy for kids to develop what they like to do.

F.Camp is the perfect place for kids to practice making decisions for themselves.

G.When kids take a break from the Internet,they rediscover their creative powers.

【语篇解读】本文是议论文。文章论述了参加夏令营活动给孩子们带来的好处。

16.D[根据该段的主题Make true friends及下文中的Every day,friendships are created可知,夏令营中有趣的活动让大家聚到一起并建立起真挚的友谊。]

17.A[根据上文中的Learn social skills及Coming to camp means joining a community where everyone must agree to work together and respect each other可知,夏令营可以帮助孩子们建立团队精神。]

18.F[F项中的内容与该段主题Grow more independent相照应,故选F 项。]

19.B[B项中的achievement与该段的主题Experience success相互照应,故选B项。]

20.C[根据下文中的Camp is action可知,夏令营包括很多体育活动。] Ⅲ.完形填空(共20小题;每小题1.5分,满分30分)

阅读下面短文,从短文后各题所给的A、B、C和D四个选项中,选出可以填入空白处的最佳选项。

I stood in the doorway,waiting.Mari was 21 ,I was sure.It was the end of our eighth-grade year,and Mari had decided to 22 the cross-country team.She 23 me to do the same,but I said no.Me run three miles?24 .Now she was speaking to the cross-country coach,trying to get in.Impatient to 25 ,I looked into the classroom to see if she was done.A pair of piercing (有穿透力的) eyes met my own.

“You running?”he asked in a deep voice,his tone (语气) making the 26 seem more like a command.He waited for my 27 while Mari looked on,amused.Being too 28 to answer no,I said,“Urn,yeah.”The man looked satisfied.Mari looked 29 .I was certain I had signed myself up for five months of 30 .

Only recently have I realized that that day was a 31 for me,marking not only the 32 of my athletic career,but also a major landmark in my growth as a person.Running has done me so much 33 .

I was very 34 coming out of the eighth grade,but running 35 my self-confidence.Being part of a team 36 me to meet new people.Through cross country I have formed many valuable 37 with other runners.Running has also

given me the confidence to be a 38 for younger runners,guiding them and providing advice and help.Never before had I considered myself a role model,39 now I am finding myself in that position.More than anything else,however,I think my improvement in self-confidence was a 40 of learning to have the courage to succeed.

【语篇解读】本文是夹叙夹议文。原本不爱跑步的作者在机缘巧合之下参加了一个跑步训练队,而这段经历对作者的人生产生了深远的影响。

21.A.crazy B.right

C.clever D.nervous

A[由下文“I said no以及Me run three miles?”可知,“我”拒绝加入越野赛跑训练队,并且对跑三英里那么远持怀疑态度,因此可推断,“我”认为Mari 报名参加训练是“疯狂的(crazy)”举动。]

22. A.hold B.join

C.help D.manage

B[由下文“she was speaking to the cross-country coach,trying to get in”可知,Mari决定“加入(join)”训练队。]

23. A.ordered B.allowed

C.taught D.asked

D[由下文but I said no可知,Mari“请求(ask)”“我”也加入训练队,但“我”拒绝了。]

24. A.Interesting B.Reasonable

C.Impossible D.Necessary

C[由上文I said no可知,“我”不愿意加入训练队,因此可推断,“我”认为自己“不可能(Impossible)”跑三英里那么远。]

25. A.leave B.enter

C.escape D.return

A[由下文see if she was done可知,“我”瞄进教室看她是不是谈完了,由此推断,“我”等得不耐烦了,想要“离开(leave)”。]

26. A.word B.voice

C.question D.decision

C[本空指代上文You running?这个“问题(question)”。]

27. A.choice B.answer

C.support D.plan

B[下文answer no是提示。]

28. A.afraid B.sorry

C.excited D.tired

A[由上文A pair of piercing eyes,a deep voice和like a command可知,教练的眼神和语气对“我”来说都有很大的压力,因此推断,“我”面对他的问题,因为“害怕(afraid)”而不敢说不。]

29. A.glad B.angry

C.worried D.surprised

D[由上文可知,Mari请“我”跟她一起加入训练队时,“我”拒绝了,而此时面对教练的询问,“我”却同意了,这令她“惊讶(surprised)”。]

30. A.enjoyment B.pain

C.noise D.freedom

B[“我”内心并不喜欢跑步,而迫于教练的压力才同意入队,因此,“我”觉得接下来五个月的训练对自己来说会充满“痛苦(pain)”。]

31. A.starting point B.breaking point

C.turning point D.talking point

C[由于在那天之前,“我”不喜欢跑步,因此,那天对“我”来说是个“转折点(turning point)”,不仅标志着“我”运动员职业的“开始(birth)”,也是

“我”人生成长路上的一座主要的里程碑。]

32. A.progress B.change

C.ending D.birth

D[见上题解析。]

33. A.wonder B.good

C.harm D.energy

B[由下一段可知,跑步给“我”带来了诸多积极的影响,即“好处(good)”。]

34. A.honest B.weak

C.shy D.lazy

C[由下文self-confidence可推断,本空说明了“我”与信心相关的性格特点,即“羞怯的(shy)”。]

35. A.improved B.destroyed

C.kept D.took

A[由本空前面的but以及最后一句中的improvement in self-confidence可推断,跑步“增强了(improve)”“我”的自信心。]

36. A.invited B.warned

C.advised D.forced

D[身在一个团队里面,不可避免地要与人接触交流,因此加入团队“迫使(force)”“我”接触他人,与许多队员建立了“友谊(friendship)”。]

37. A.friendships B.agreements

C.systems D.organizations

A[见上题解析。]

38. A.runner B.winner

C.leader D.star

C[由下文“guiding them and providing advice and help”可推断,“我”变得

更加自信,成为年轻队员们的领队。]

39. A.so B.though

C.since D.but

D[“我”之前从未把自己看成榜样,“然而(but)”现在“我”已成为榜样。]

40. A.purpose B.result

C.chance D.method

B[“learning to have the courage to succeed”与“my improvement in self-confidence”之间是因果关系,“我”自信心的增强是“结果(result)”。]

【导学号:21122061】Ⅳ.语法填空(共10小题;每小题1.5分,满分15分)

阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

A friendly dolphin (海豚) has saved a teenage boy from drowning.Non-swimmer Davide Ceci,41.was 14,was within minutes of death when dolphin Filippo came to his rescue.

The friendly creature has been a popular tourist 42.(attract) off Manfredonia in south-east Italy for two years.But now he is a local hero after 43.

(save) Davide when he fell from his father's boat.

While Emanuele Ceci still didn't know his son had fallen into the waves,Filippo was pushing him up out of the water to safety.Davide said,“When I 44. (realise) it was Filippo pushing me,I held onto him.”The dolphin bore down on the boat and got close enough for Davide's father 45.(catch) his frightened son.

Davide's mother Signora Ceci said,“It is a hero.Generally,it seems 46. (possible) that an animal could have done something like that,to save a human life.It is unbelievable.”

Filippo has lived in the waters off Manfredonia since he became separated 47.

a visiting school of dolphins.Maritime researcher Dr Giovanna Barbieri said,“Filippo seems not to have the 48.(slight) fear of humans.I'm not 49.

(surprise) he should have done such 50.wonderful thing as to

save a human.”

41.who[考查关系代词。设空处引导非限制性定语从句,补充说明Davide Ceci,且在从句中作主语,故填who。]

42.attraction[考查名词。设空处在此作表语,表示“有吸引力的事物”,且由前面的a可知,应填名词attraction。]

43.saving[考查动词-ing形式作宾语的用法。设空处作介词after的宾语,且he与save之间是逻辑上的主谓关系,故填saving。]

44.realised[考查一般过去时。由主句的时态可知,设空处所表示的动作发生在过去,故填realised。]

45.to catch[考查不定式作状语的用法。由语境可知,海豚靠近船是为了让Davide的父亲能够到他,故填to catch。]

46.impossible[考查形容词作表语的用法。由语境及后面的It is unbelievable可知,一般来说,动物似乎不太可能会救助人类,故填impossible(不可能的)。]

47.from[考查介词。separate...from...意为“把……和……分开”,故填from。]

48.slightest[考查形容词最高级。由设空处前面的the可知,应用形容词最高级,故填slightest。]

49.surprised[考查过去分词作表语的用法。设空处在此作表语,意为“吃惊的”,故填surprised。]

50.a[考查不定冠词。thing为可数名词且在此表泛指,故填a。“such+a(n)+可数名词单数形式”意为“这样的一个……”。]

Ⅴ.短文改错(共10小题;每小题1分,满分10分)

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10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(从第11处起)不计分。

One day my parents weren't at home,so I asked some of my friends have a party.We played such happily that we forgot everything.Unfortunate,I dropped my father's favourite glass by an accident.It was in piece and my heart speeded up.What should I do?When he came back,I was afraid of be punished and didn't tell the true.I told him it was the cat which broke the glass.My father said nothing,but I could see his distrust.The next morning,after a sleepless night,I admit to my father that it was my fault.I saw relief in their eyes.From then on,I never told lies.

【答案】

One day my parents weren't at home,so I asked some of my friends ∧

to have a

party.We played such

so happily that we forgot everything.

Unfortunate

Unfortunately,I dropped my

father's favourite glass by ﹨a n accident.It was in piece

pieces and my heart speeded

up.What should I do?When he came back,I was afraid of

be

being punished and didn't

tell the true

truth.I told him it was the cat

which

that broke the glass.My father said nothing,

but I could see his distrust.The next morning,after a sleepless night,I

admit admitted to

my father that it was my fault.I saw relief in their

his eyes.From then on,I never told

lies.

Ⅵ.书面表达(满分25分)

假设你是某国际学校的学生李华,请针对你校学生在餐厅随意丢弃剩饭

(leftover)的现象,用英语给外籍校长Mr.Smith写一封电子邮件。要点包括:

1.说明存在的问题;

2.提出整改建议;

3.期望采纳。

注意:词数100左右(开头和结尾已给出,但不计入总词数)。

Dr.Mr.Smith,

I'm Li Hua,a student from Class Ⅱ,Senior I.I'm writing to draw your attention to some improper behaviours among us students.

Yours sincerely,

Li Hua 【参考范文】

Dr.Mr.Smith,

I'm Li Hua,a student from Class Ⅱ,Senior Ⅰ.I'm writing to draw your attention to some improper behaviours among us students.Some students leave their leftover food everywhere,on the table or on the ground,which makes the hall rather unpleasant for us to come and eat there.

I wonder if the school could take measures to solve the problem.First,the school should encourage students to form good habits by putting posters around the hall,asking them to be more thoughtful of their behaviours and protect our environment.Besides,anyone who is found dropping litter should be punished by making them clean up the dining hall.Only in this way can we have a clean and tidy dining hall and enjoy ourselves there.

I hope you'll take my advice into consideration.

Yours sincerely,

Li Hua

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二次函数测试题及答案

1. 2. 3. 4. 5. 6. 、选择题: 二次函数 抛物线y =(x-2)2 3的对称轴是( A.直线x = —3 B.直线x =3 二次函数y 二ax 2 在( ) A.第一象限 C.第三象限 已知二次函数 则一定有( 2 A. b —4ac 0 bx c 的图象如右图,则点 = ax 2 把抛物线y =x 2 ? bx B.第二象限 D.第四象限 C. M bx c ,且 a ::: 0,a -b c .0, 2 B. b -4ac =0 C. b 2 -4ac :: 2 D. b —4ac < 0 c 向右平移3个单位,再向下平移 2个单位,所得图象的解析式是 2 y =x -3x 5,则有( A. b = 3 , c -1 C. b =3 , c =3 B. b = -9 , c = -15 D. b = —9 , c =21 下面所示各图是在同 一直 角 坐标 系内,二次 函数y 二ax 2 (a c)x c 与一次 函数 k 已知反比例函数y 的图象如右图所示,则二 x y =ax c 的大致图象,有且只有一个是正确的,正确的是(

11. 已知抛物线y =ax2 bx c与x轴有两个交点,那么一元二次方程ax2 bx 0的根的 情况是_______________________ 12. __________________________________________________________________ 已知抛物线 y=ax2+x+c与x轴交点的横坐标为-1,则a+c= _______________________________ 13. 请你写出函数y=(x+1)2与y=x2+1具有的一个共同性质:_____________________ . 14. 有一个二次函数的图象,三位同学分别说出它的一些特点:甲:对称轴是直线x =4 ; 乙:与x轴两个交点的横坐标都是整数; 丙:与y轴交点的纵坐标也是整数,且以这三个交点为顶点的三角形面积为 3. 请你写出满足上述全部特点的一个二次函数解析式: 15. 已知二次函数的图象开口向上,且与y轴的正半轴相交,请你写出一个满足条件的二次函 数的解析式:________________________. A.x 二-2 B. x =2 C. 8. 二 欠 函 1 数y :=(x -1)2'2的最小值是() A.-2 B. 2 C. D. 1 9. - 二- 次函数y =ax2bx c的图象如图所 M=4 a 2b c N = a —b c , P = 4a-b ,则( A.M0 , N 0, P 0 B.M<0 ,N 0, P 0 C.M0, N :: 0, P 0 D.M0 , N 0, P :::0 、 填空题: 7.抛物线y=x2 -2x 3的对称轴是直线( )x = —1 D. x =1 10.将二次函数y =x2 -2x 3配方成y =(x -h)2? k的形式,则y= ____________________

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