EP82-The hot dog stand location problem-热狗摊选址问题
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学英语报社报纸答案九年级学英语报答案一、听力测试(共20小题,计25分)注意:听力测试分四部分,共25小题。
做题时,先将答案画在试卷上,录音内容结來后, 将所选答案转涂到答题卡上。
(一) 听句子,选择与句子内容相对应的图片,每个句子读两遍,请看第一组的四个图片,听每个句子,完至第3小题。
1. ________2. ________3. ________请看第二组的四个图片,听三个句子,完成第4至第6小瓶,4. ________5. ________6. ________(二) 听对话和问题,根据所听内容,选择最佳答案。
对话和问题都读两遍。
7. A. In May. B. In March. C. In November. D. In September.8. A. $30.B. $ 300. .C. $60.D. $ 600.9. A. Because it's funny.B. Because it’s exciting.C. Because it’s scary.D. Because it’s sad.10. A. Never. B. Every day. C. Once a week.D. Twice a week.11. A. Jack.B. Sam. C. Bob. D. Tom.12. A. Clean the living room and the kitchen.B. Sweep the floor and take out the trash.C. Clean the kitchen and take out the trash.D. Sweep the floor and clean the living room.13. A. A hamburger and French fries.B. A hamburger and ice cream.C. French fries and ice cream.D. French fries and coffee.14. A. A bookstore. B. A drugstore. C. A bank.D. A museum.(三)听短文,根据短文内容,判断下列句子正误,正确的用“A”表示,不正确的用“B”表示, 短文读两遍。
新概念英语第一册课文(全中文)$课文1对不起!1对不起2什么事?3这是您的手提包吗?4对不起,请再说一遍。
5这是您的手提包吗?6是的,是我的。
7非常感谢!对不起,先生。
8请把我的大衣和伞拿给我。
9这是我(寄存东西)的牌子10谢谢,先生。
11是5号。
12这是您的伞和大衣13这不是我的伞。
14对不起,先生。
15这把伞是您的吗?16不,不是!17这把是吗?18是,是这把19非常感谢。
5很高兴见到你。
20早上好。
21早上好,布莱克先生。
22这位是索菲娅23索菲娅是个新学生。
24她是法国人。
25索菲娅,这位是汉斯。
26他是德国人。
27很高兴见到你。
28这位是直子。
29她是日本人。
30很高兴见到你。
31这位是昌宇。
32他是韩国人。
33很高兴见到你。
34这位是鲁明。
35他是中国人。
36很高兴见到你。
37这位是晓惠。
38她也是中国人。
39很高兴见到你。
你是教师吗?40我是个新学生,41我的名字叫罗伯特。
42很高兴见到你。
43我的名字叫索菲娅。
44你是法国人吗?45是的,我是法国人。
46你也是法国人吗?47不,我不是。
48你是哪国人?49我是意大利人。
50你是教师吗?51不,我不是。
52你是做什么工作的?53我是电脑录入员。
54你是做什么工作的?55我是工程师。
9今天好吗?56你好,海伦57你好,史蒂文58你今天好吗?59很好,谢谢你。
60你好吗?61很好,谢谢。
62托尼好吗?63他很好,谢谢。
64埃玛好吗?65她也很好,海伦。
66再见,海伦。
67见到你真高兴。
68我见到你也很高兴,史蒂文。
69再见。
11这是你的衬衫吗?70那是谁的衬衫?71戴夫,这是你的衬衫吗?72不,先生。
7 3这不是我的衬衫。
74这是我的衬衫。
75我的衬衫是蓝色的。
76这件衬衫是蒂姆的吗?77也许是,先生。
78蒂姆的衬衫是白色的。
79蒂姆!80什么事,先生。
81这是你的衬衫吗?82是的,先生。
83给你。
84接着!85谢谢您,先生。
$课文13一件新连衣裙86你的新连衣裙是什么颜色的?87是绿色的。
2024年东北三省四城市联考暨沈阳市高三质量监测(二)英语注意事项:1.答卷前,考生务必将自己的姓名、考号填写在答题卡上。
2.选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑。
如需改动,用橡皮擦干净后,再选涂其他答案标号。
不能答在本试卷上,否则无效。
3.考试结束后,考生将答题卡交回。
第一部分:听力(共两节,满分30分)做题时,先将答案标在试卷上。
录音内容结束后,你将有两分钟的时间将试卷上的答案转涂到答题卡上。
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。
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。
例:How much is the shirt?A.£19.15.B.£9.18.C.£9.15.答案是C。
1.What will the speakers do next?A.Go to the supermarket.B.Drive home.C.Make a list.2.What is the man doing?A.Riding a bike.B.Driving a car.C.Checking a motorbike.3.What is the probable relationship between the speakers?A.Strangers.B.Schoolmates.C.Roommates.4.Where does the conversation probably take place?A.In a school.B.In a bookshop.C.In a cleaner’s room.5.How many times was Philip told his dinner was ready?A.One.B.Two.C.Three.第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。
算法设计与分析(第2版)-王红梅-胡明-习题答案习题11. 图论诞生于七桥问题。
出生于瑞士的伟大数学家欧拉(Leonhard Euler ,1707—1783)提出并解决了该问题。
七桥问题是这样描述的:一个人是否能在一次步行中穿越哥尼斯堡(现在叫加里宁格勒,在波罗的海南岸)城中全部的七座桥后回到起点,且每座桥只经过一次,图 1.7是这条河以及河上的两个岛和七座桥的草图。
请将该问题的数据模型抽象出来,并判断此问题是否有解。
七桥问题属于一笔画问题。
输入:一个起点输出:相同的点1, 一次步行2, 经过七座桥,且每次只经历过一次3, 回到起点该问题无解:能一笔画的图形只有两类:一类是所有的点都是偶点。
另一类是只有二个奇点的图形。
2.在欧几里德提出的欧几里德算法中(即最初的欧几里德算法)用的不是除法而是减法。
请用伪代码描述这个版本的欧几里德算法1.r=m-n2.循环直到r=02.1 m=n图1.7 七桥问题2.2 n=r2.3 r=m-n3 输出m3.设计算法求数组中相差最小的两个元素(称为最接近数)的差。
要求分别给出伪代码和C++描述。
//采用分治法//对数组先进行快速排序//在依次比较相邻的差#include <iostream>using namespace std;int partions(int b[],int low,int high){int prvotkey=b[low];b[0]=b[low];while (low<high){while (low<high&&b[high]>=prvotkey)--high;b[low]=b[high];while (low<high&&b[low]<=prvotkey)++low;b[high]=b[low];}b[low]=b[0];return low;}void qsort(int l[],int low,int high){int prvotloc;if(low<high){prvotloc=partions(l,low,high); //将第一次排序的结果作为枢轴qsort(l,low,prvotloc-1); //递归调用排序由low 到prvotloc-1qsort(l,prvotloc+1,high); //递归调用排序由 prvotloc+1到 high}}void quicksort(int l[],int n){qsort(l,1,n); //第一个作为枢轴,从第一个排到第n个}int main(){int a[11]={0,2,32,43,23,45,36,57,14,27,39};int value=0;//将最小差的值赋值给valuefor (int b=1;b<11;b++)cout<<a[b]<<' ';cout<<endl;quicksort(a,11);for(int i=0;i!=9;++i){if( (a[i+1]-a[i])<=(a[i+2]-a[i+1]) )value=a[i+1]-a[i];elsevalue=a[i+2]-a[i+1];}cout<<value<<endl;return 0;}4.设数组a[n]中的元素均不相等,设计算法找出a[n]中一个既不是最大也不是最小的元素,并说明最坏情况下的比较次数。
2019陕西中考英语试题及答案一、听对话,选答案(共15小题,计15分)第一节:听下面的10段对话,每段对话后有一个问题,读两遍,请根据每段对话的内容和后面问题,给的问题,从所给的三个选项中选出最恰当的一项1. A. Tired B. Sad C. Happy2. A. In a post office B. In a restaurant C. In a bank3. A. Father and daughter B. Teacher and student C. Mother and son4. A. The white trousers B. The blue shirt C. The white shirt5. A. A teacher B. A doctor C. A pilot6. A. It will be sunny B. It will be cloudy C. It will be rainy7. A. John B. Lily C. Kate8. A. On Sunday B. On Saturday C. On Friday9. A. Because he keeps running every morning.B. Because he practices playing basketball.C. Because he has less food for supper now.10. A. 24 B.16 C.8第二节:听下面两段对话,每段对话后有几道小题,请根据每段对话的内容和后面的问题。
从给的三个中选出最恰当的一项。
每段对话读两遍。
听第11段对话,回答第11,12小题11. What are they going to do?A. Play in a park.B. Visit a museum.C. Climb a hill12. How will they go there?A. By subway.B. By bus.C. By bike.听第12段对话,回答第13至15小题13. What class will Harry have on Sunday?A. An English class.B. A physics class.C. A math class.14. Where does Sara plan to go?A. To the bookstore.B. To the cinema.C. To the school.15. When will Harry probably call Sara?A. This eveningB. Tomorrow morning.C. This Sunday.本题你将听到一篇短文,读两遍,请从每个小题的三个选项中,选出最恰当的一项16. Where is the highest building?A. It's in South Africa.B. It's in North America.C. It's in West Asia.17. How many lifts are used to carry people up and down?A.57.B.47.C.75.18.According to the speaker,there are many hotels,and homes in the building.A. schoolsB. officesC. hospitals19. What is on the top floor of the building?A.A small library.B.A small garden.C.A swimming pool.20.In this passage,“they find it really attractive”means they find it reallyA. beautifulB. noisyC. strange二、完形填空(共20小题,计20分)第一节:阅读下面短文,按照句子结构的语法性和上下文连贯的要求,从各小题的四个选项中选出一个最佳等案,使短文连贯完整。
人教版七年级下册英语期中复习:阅读选择+任务型阅读试题精选汇编八、阅读理解(51-55 题,66-70 题,每小题 2 分,其他题 1 分,满分35 分)A【考点】文段理解信息匹配【难度星级】★★46【答案】F【解析】题干中的Amy 喜欢V olleyball,故选F。
47【答案】D【解析】题干中的Brian 擅长tennis,故选D。
48【答案】C【解析】题干中的Tom 擅长乒乓,故选C。
49【答案】E【解析】题干中的Joe 最热爱的运动是篮球。
故选E。
50【答案】B【解析】题干中的Lily 爱下棋,故选B。
B请阅读下面短文,从每小题所给的A、B、C 三个选项中,选出一个最佳选项,并在答题卡上将该选项涂黑。
In America, the school life is not easy for us students. There are so many rules we have to follow. When we start school, we get a rule book. There are always teachers looking out for people who are breaking the rules and perfects are everywhere too.The most rules are in the classroom and in the hallways. For example, you can’t run or dance around in the hallways. Only up to three people can walk abreast in a hallway. We can’t put our bags everywhere in the hallways.You can’t eat or drink in the classr oom or the hallways. Perfects watch you. They can give out duty slips (cleaning the dining hall for about 2 hours).If you make mistakes, you will get a detention. You may have to do some work for school. A detention is the most painfu l. You have to do a lot of tiring and boring things.There are rules for students out of school as well. Boys should not buy take-away food in the street if they wear the school uniforms. The school also expects good behavior on public transport and in public places.( ) 51. In the first paragraph, the “people” are ________________.A. teachersB. studentsC. parents( ) 52. There are most rules in the ______________at school.A. kitchenB. hallwayC. library( ) 53. If the prefect sees you eating an apple in the classroom, you have to _____________.A. go homeB. stand for 2 hoursC. clean the dining hall( ) 54. In the fourth paragraph, “painful” means __________ in Chinese.A. 自由的B. 随意的C. 痛苦的( ) 55. From the passage, students may think the rules are ________________.A. TerribleB. relaxingC. boring【考点】细节理解题【难度星级】★★【答案】BBCCA【解析】51. 由文章中第一段的首句可知答案为B;52. 由文章中的第二段首句可知答案为B;53. 由文章中第三段可知答案为C ;54. 词义辨析,联系上下文得知答案选C;55. 由文章整体内容得知选项BC错误,表达的应该是不好的感觉,故答案为A。
2022年6月图形化一级官网真题分数:100 题数:37一、单选题(共25题,共50分)1.广场中有声控喷泉,当声音的音量大于60的时候,喷泉就会喷出水,现在的音量为30,下列哪个选项可以让喷泉喷出水?() [单选题] *A.B.(正确答案)C.D.答案解析:试题解析:当前声音的音量为30,需要将声音增加到60以上就可以让喷泉喷出水,选项A将声音减少40,选项B将声音增加40,选项C设置音量为40,选项D将音调增加40,故选项B正确。
2.造型编辑器中,选中橙子以及它的阴影后,点击下面哪个按钮可以让造型从图1变成图2?()[单选题] *A.B.C.D.(正确答案)答案解析:试题解析:考察造型中的垂直翻转3、小猫和小狗赛跑比赛,下图的黑线是终点,两个角色初始位置距离终点都是50步,点击绿旗后,谁先到达终点?()下图为小猫的程序:下图为小狗的程序:[单选题] *A. 小猫(正确答案)B. 小狗C. 同时到达D. 不一定试题解析:积木“播放声音等待播完”是指声音播放完毕后才往下继续执行,显然要耗时更长。
答案解析:试题解析:积木“播放声音等待播完”是指声音播放完毕后才往下继续执行,显然要耗时更长。
4. 下面选项说法错误的是?() [单选题] *A. 舞台区可以同时展示多个角色,但是只能同时展示一个背景。
B. 角色的造型有位图和矢量图两种模式。
C. 作品名称只能在编程界面修改,不能在保存到电脑时修改。
(正确答案)D. 不使用积木块也可以设置角色的旋转方式。
答案解析:试题解析:作品名称可以在编程界面修改,也可以在保存到电脑时修改。
5、小猫有如下两个造型,下列程序执行结束后,小猫的造型是?()[单选题] *A. 造型1(正确答案)B. 造型2C. 有可能造型1,也有可能造型2D. 造型1和造型2会不停切换答案解析:试题解析:程序按照从上往下的顺序执行,先是换成造型2,等待一秒之后切换为下一个造型,因为小猫只有两个造型,造型2的下一个造型是造型1。
第四单元测评(时间:120分钟满分:150分)第一部分听力(共两节,满分30分)(语言能力)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。
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.What is the woman worried about?A.Her friend Lisa.B.Her books.C.Her new house.答案:B2.Where did the man meet Henry?A.At the meeting.B.In the office.C.In the lift.答案:C3.Why does the woman cancel her husband’s appointment?A.He’s ill.B.He is busy.C.He is out.答案:A4.What is the man poor in when using Chinese?A.Reading.B.Writing.C.Speaking.答案:C5.What size T-shirt does the woman want to buy?A.38.B.40.C.42.答案:B第二节(共15小题;每小题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。
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,各小题将给出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、7题。
6.What’s the probable relationship between the speakers?A.Husband and wife.B.Waiter and customer.C.Teacher and student.答案:A7.What does the woman suggest buying?A.A bed.B.A desk.C.A dining table.答案:C听第7段材料,回答第8、9题。
大学生英语竞赛(NECCS)C类模拟试卷1(题后含答案及解析)题型有:1. Listening Comperhension 2. V ocabulary and Structure 4. Reading Comperhension 6. Translation 7. IQ Test 8. WritingPart I Listening ComperhensionSection A听力原文:M: Can you tell me the title of this oil painting?W: Sorry. I don’t know for sure. But I guess it’s an early 18th century work. Let me look it up in the catalog.Q: Where does this conversation most probably take place?1.A.At an art galleryB.In a department storeC.At a bookstore.正确答案:A听力原文:M: How about the food I ordered? I’ve been waiting for twenty minutes already.W: I’m very sorry, sir. I’ll be back with your order in a minute.Q: What’s the woman’s job?2.A.A shop assistantB.A telephone operatorC.A waitress正确答案:C听力原文:W: Would you tell me how many of your employees have received higher education?M: Of course. We have a very high percentage of university graduates on our staff. We have 184 of them, which accounts for 80% of all our staff members.Q: How many of the employees do not have a university degree?3.A.46B.184C.230正确答案:A听力原文:M: Did you tell Tom about the meeting?W: Whatever I say to him goes in one ear and out the other.Q: What does the woman mean?4.A.Tom doesn’t listen to her.B.Tom went out before the meeting was over.C.Tom is unable to hear well.正确答案:A听力原文:M: It’s been raining since Monday, but clear weather is forecast for tomorrow.W: I’m glad to hear that because I always play golf on Thursday and I like to have good weather.Q: What will the weather probably be like on Thursday?5.A.It will probably be cold.B.It will probably rain.C.It will probably not rain.正确答案:C听力原文:M: I just bought a new sound card for my computer. It was a big bargain. I got it for only $50.W: Are you trying to impress me? I don’t care much about it.Q: What does the woman mean?6.A.She is well interested in the sound card.B.She doesn’t have much interest in the sound card.C.She thinks the card sounds impressive.正确答案:BSection B听力原文:M: Many people seem to be on a diet. Have you noticed that, Anna?W: Yeah, I heard a lot of girls talking about diets.M: A friend of mine, Linda, was once on an egg diet. She ate an egg for breakfast, an egg for lunch, and two eggs for dinner. She thought eggs were cheap, and eating eggs could make her slim.W: Oh, my God! That would be bad for her health. Had she lost any weight?M: Yeah, a little bit. But the problem is that she felt very sick. Then after one week, she had to give up. She said two days after eating eggs for three meals, she felt very dizzy. But she didn’t want to stop because she promised to herself that she would keep on doing that for one month. Her ideal weight is 45 kilos.W: It is wise for her not to do that any more. It is true that eggs have a lot of protein, however, eating too many eggs is bad for the heart.M: Yeah, it is true. I agree with you. On Wednesday, I went to see her. She looked very pale. She has been in bed for three days.W: I am sorry to hear that. Tell her not to do that any more. Actually, the best way to lose weight is to eat less and exercise more.7.What are the man and woman talking about?A.Eggs.B.Diets.C.Protein.正确答案:B8.How many eggs did Linda eat for breakfast, lunch, and the supper respectively?A.One; Two; One.B.Two; One; One.C.One; One; Two.正确答案:C9.Why did Linda choose eggs to lose weight?A.Because she believed eggs were not very expensive and also contained a lot of protein.B.Because she had been told that eating eggs could help her to have a fine figure.C.Because she liked eggs so much that she could not stand if she didn’t eat eggs every day.正确答案:B10.How long had Linda been on a dietA.One week.B.One month.C.Three days.正确答案:ASection C听力原文:An Indonesian navy official says at least 16 people are dead following a fire on a passenger boat in the Bay of Jakarta. Navy ships and aircraft helped with rescue efforts. At least 274 people have been saved.11.How many passengers were saved in the accident?A.274B.16C.60正确答案:A听力原文:Indian police are questioning two people in connection with the bomb attack on a train Sunday that killed 68 people. Security officials say they detained aman and his wife Wednesday in the area near India’s northern border with Pakistan.12.Where were the two people detained?A.In PakistanB.In IranC.In India.正确答案:C听力原文:The U.S. space agency, NASA, launched a satellite Saturday that scientists hope will help them locate the sources of mysterious gamma ray explosions, the brightest most energetic bursts in the universe. This is a nearly 40-year-old puzzle.13.What’s the purpose of launching the satellite in the news?A.To detect the pollution area on the earth.B.To locate the sources of gamma ray explosions.C.To destroy the mysterious material in the universe.正确答案:B听力原文:China Netcom raised more than $1 billion from its initial public offering, while South Korea has acted to jumpstart its economy. China Netcom, the country’s leading fixed-line phone operator, will use proceeds from its initial public offering to expand its network and pay off bank loans.14.Which country cooperated with China Netcom?A.South Korea.B.Japan.C.America.正确答案:A听力原文:Oscar-winner Kevin Spacey stars in, co-wrote and directed a musical biography of versatile performer Bobby Darin, the 1960’s pop superstar who died at age 37 after a short but momentous career.15.What is true about Kevin Spacey according to the news?A.He died at age 37.B.He was the 1960’s pop superstar.C.He was an Oscar winner.正确答案:C听力原文:More than 6,000 delegates from 194 nations have gathered in the Argentine capital of Buenos Aires for the 10th annual United Nations Convention on Climate Change. Monday’s opening ceremony allowed participants to reflect on recent accomplishments and look to the future.16.What’s the main theme of the convention?A.Climate Change.B.United Nations’ Future.C.Recent Accomplishments in Economy.正确答案:A听力原文:In Afghanistan, a suicide bomber crashed his car into a group of security vehicles Thursday. The bombing in Kabul killed two foreigners including an American. Afghan officials say eight other people were wounded including at least two Afghans.17.How many foreigners were killed in the bombing?A.TwoB.OneC.Eight正确答案:A听力原文:Diplomats from the group known as “the Middle East Quartet” have met in Jerusalem. The diplomats considered a plan to name British Prime Minister Tony Blair as a Middle East diplomat. They were also to discuss how to restart peace efforts between Israelis and Arabs. The diplomats did not comment after their meeting. In London, Mr. Blair said he would do whatever he could to help bring about a lasting resolution of the dispute between Israelis and Palestinians. His term as prime minister ends Wednesday. The Middle East Quartet includes the European Union, Russia, the United Nations and the United States.18.Which country is one of the members in the Middle East Quartet?A.JapanB.BritainC.Russia正确答案:C听力原文:A powerful windstorm hit southwestern Pakistan Tuesday. The windstorm was blamed for killing at least ten people. Tens of thousands of others fled to higher ground. The windstorm had winds of up to 130 kilometers an hour when it hit Balochistan province.19.Which part of the country was hit by the windstorm ?A.SoutheastB.NorthwestC.Southwest正确答案:C听力原文:Taliban rebels in Afghanistan say South Korea has a few more hoursto negotiate the release of 23 kidnapped South Koreans. The rebels say they will kill the hostages unless Taliban prisoners are released. The Taliban told news groups that negotiations are not going well. The hostages were serving in Afghanistan as aid volunteers.20.What is the nationality of the hostages?A.AfghanistanB.South KoreanC.Japan正确答案:BSection D听力原文:What happens when one student hurts another’s individual rights? Standards and rules must be established that maintain order, ensure (21) justice, and protect individual rights, but do not (22) contradict school policy. Without clear (23) guidelines mutually agreeable to students, teachers, and (24) administration, the classroom can become chaotic. Students may break rules they did not know (25) existed. If standards are set without input from the class, student may spend a great deal of creative energy in (26) ruining the class environment, finding ways to break rules. No matter how (27) skillful the teacher is in uniting students and establishing a positive atmosphere, the task is never complete. (28) Regular maintenance is necessary. Conflicts arise. The needs of individual members change. A new kind of learning task requires a new organizational structure. Sometimes pressures such as holidays, (29) Upcoming tests or athletic contests, or family troubles cause stress in the classroom. One task for the teacher is to restore a positive environment by helping students (30) cope with conflict, change, and stress.What happens when one student hurts another’s individual rights? Standards and rules must be established that maintain order, ensure【21】, and protect individual rights, but do not【22】school policy. Without clear【23】mutually agreeable to students, teachers, and【24】, the classroom can become chaotic. Students may break rules they did not know【25】. If standards are set without input from the class, student may spend a great deal of creative energy in【26】the class environment, finding ways to break rules. No matter how【27】the teacher is in uniting students and establishing a positive atmosphere, the task is never complete.【28】maintenance is necessary. Conflicts arise, The needs of individual members change. A new kind of learning task requires a new organizational structure. Sometimes out pressures such as holidays,【29】tests or athletic contests, or family troubles cause stress in the classroom. One task for the teacher is to restore a positive environment by helping students【30】with conflict, change, and stress.21.正确答案:justice22.正确答案:contradict23.正确答案:guidelines24.正确答案:administration25.正确答案:existed26.正确答案:ruining27.正确答案:skillful28.正确答案:Regular29.正确答案:upcoming30.正确答案:copePart ⅡV ocabulary and Structure31.______, I got the job-probably because, as a woman, I was cheaper. A.SurprisinglyB.ObviouslyC.As a resultD.Therefore正确答案:A32.Had he worked harder, he ______ the exam.A.must have got throughB.would have got throughC.would get throughD.could get through正确答案:B33.Never ______ the power of your actions. With one small gesture you can change a person’s life.A.underestimateB.overvalueC.misuseD.dismiss正确答案:A34.Everyone knew that ______ the project would be completed and we’d all have to return to our own separate departments.A.primarilyB.preciselyC.eventfullyD.ultimately正确答案:D35.We can’t do any more now. Let’s call it a ______.A.haltB.dayC.stopD.night正确答案:B36.We would like to express our ______ a large number of businesses and business publications, who have given us permission to use various types of their materials.A.thanks atB.gratefulness onC.gratitude inD.appreciation to正确答案:D37.New peace proposals ______ at the recent Middle East conference.A.have presentedB.are spoken outC.were put forwardD.had made up正确答案:C38.______ turn up late at the meeting, he forget his relevant documents.A.Not only did he; alsoB.No sooner did he; thanC.As soon as he; /D.As long as he did; never正确答案:A39.Anyone can answer such a question as this one, ______?A.can heB.can’t theyC.can’t heD.don’t they正确答案:B40.______ we are having these days!A.What a lovely weatherB.What lovely weathersC.What lovely weatherD.What lovely a weather正确答案:C41.Helena: Oh, welcome, come in, please. Jack: ______ And here’s a small gift. Let me wish you happy every day. Helena: Thank you. Oh, what a beautiful birthday card!A.Many happy returns.B.Enjoy yourself.C.Hoping you’ll be well soon!D.I wish you the best of luck!正确答案:D42.John: The radio’s terribly loud. Could you turn it down a little? Peter: Sorry! ______ John: Yes, and something else--wouldn’t it be an idea to buy your own soap?A.A football match was broadcast live on it.B.I forgot where I put my soap this morning.C.Is it disturbing you?D.Could you repeat what you said?正确答案:C43.Bill: What’s the time? Blanche: 8 o’clock, so we’d better get a move on if we’re going to meet your sister at the airport. Bill: That’s alright. Her flight doesn’t arrive until 8:30. Blanche: Yeah, but it’ll take us an hour to get there--you know what the traffic is like. Bill: OK. ______ Blanche: What’s wrong with those shorts? Bill: I don’t like driving in shorts. I’m going to put some jeans on.A.I’ll just go and get changed.B.I’ll wash my hands.C.Please wait me a moment.D.I’ll be back soon.正确答案:A44.Gloria: ______ Daniel: I said, “Do you want me to help you?” Gloria: If you’re sure you’re not in a hurry, you can give me some help. Daniel: Would you like me to get you a cab?A.Excuse me, can you do me a favor?B.What happen to you?C.What would you advise?D.I’m sorry, but I didn’t catch what you said.正确答案:D45.Jenny: So Joe, I heard your sister decided to go into the army. ______ Joe: Well, I don’t know. Most of the people in the army are men. I don’t think women should be in the army. It’s really a man’s job. You have to be strong. Jenny: Strong, huh. ______ Joe: No, not like a man. Jenny: Oh, I see.A.That’s a good news.; i am strong enough.B.What do you think about that?; Don’t you think women can be strong?C.What are you going to do?; It doesn’t matter.D.I’m sorry to hear that.; Don’t you think you are strong?正确答案:BPart ⅣReading ComperhensionSection APeople living on parts of the south coast of England face a serious problem. In 1993, the owners of a large hotel and of several houses discovered, to their horror, that their gardens had disappeared overnight. The sea had eaten into the soft limestone cliffs on which they had been built. While experts were studying the problem, the hotel and several houses disappeared altogether, sliding down the cliff and into the sea. Erosion of the white cliffs along the south coast of England has always been a problem but it has become more serious in recent years. Dozens of homes have had to be abandoned as the sea has crept farther and farther inland. Experts have studied the areas most affected and have drawn up a map for local people, forecasting the year in which their homes will be swallowed up by the hungry sea. Angry owners have called on the Government to erect sea defenses to protect their homes. Government surveyors have pointed out that in most cases, this is impossible. New sea walls would cost hundreds of millions of pounds and would merely make the waves and currents go further along the coast, shifting the problem from one area to another. The danger is likely to continue, they say, until the waves reach an inland area of hard rock which will not be eaten as limestone is. Meanwhile, if you want to buy a cheap house with an uncertain lucre, apply to a house agent in one of the threatened areas on the south coast of England. You can get a house for a knockdown price but it may turn out to be a knockdown home.46.What is the cause of the problem that people living on parts of the south coast of England face?A.The rising of the sea level.B.The experts’ lack of knowledge.C.The washing-away of limestone cliffs.D.The disappearance of hotels, houses and gardens.正确答案:C47.The erosion of the white cliffs in the south of England ______.A.will soon become a problem for people living in central EnglandB.has now become a threat to the local residentsC.can be stopped if proper measures are takenD.is quickly changing the map of England正确答案:B48.The experts’ study on the problem of erosion can ______.A.warn people whose homes are in dangerB.provide an effective way to slow it downC.help the prevent it from worseningD.lead to its eventual solution正确答案:A49.It is not feasible to build sea defenses to protect against erosion because ______.A.house agents along the coast do not support the ideaB.it is too costly and will endanger neighboring areasC.the government is too slow in taking actionD.they will be easily knockdown by waves and currents正确答案:B50.According to the author, when buying a house along the south coast of England, people should ______.A.take the quality of the house into considerationB.guard against being cheated by the house agentC.examine the house carefully before making a decisionD.be aware of the potential danger involved正确答案:DIt is generally accepted that every experience teaches the child something and the effects are cumulative. “upbrigning” is normally used to refer to the treatment and training of the child within the home. This is closely related to the treatment and training of the child in school, which is usually distinguished by the term “education”. In a society such as ours, both parents and teachers are responsible for the opportunities provided for the development of the child, so that upbringing and education are interdependent. The ideals and practices of child rearing vary from culture to culture. In general, the more rural the community, the more uniform are the customs of child Upbringing. In more technologically developed societies, the period of childhood and adolescence tends to be extended over a long time, resulting in more opportunity for education and greater variety in character development. Early upbringing in the home is naturally affected both by the cultural pattern of the community and by the parents’ capabilities and their aims and depends not only on upbringing and education but also on the innate abilities of the child. Intelligent parents, however, realize that the particular setting of each family is unique, and there can be no rigid general rules. All parents have to solve the problems of freedom and discipline. The younger the child, the more readily the mother gives is to his demands to avoid disappointing him. She knows that if his energies are not given an outlet, her child’s continuing development may be warped. A child must be allowed to enjoy this “messy” but tactile stage of discovery before he is ready to goon to the less physical pleasures of toys and books. Similarly, throughout life, each stage depends on the satisfactory completion of the one before.51.It’s a general belief that a child’s later character and personality is ______ decided by his early experiences both at home and in school.A.chieflyB.by chanceC.entirelyD.seldom正确答案:A52.The word “cumulative” (in line 1, Para. 1) most probably means ______.A.decisiveB.extremely beneficialC.strongD.progressively greater正确答案:D53.It can be seen from the passage that ______.A.the cultural pattern is the single factor that affects a child’s upbringing in the homeB.by no means does the technological development of children’s characterC.there are advisable rules for parents to go by in bringing up their childrenD.upbringing and education are mutually complementary正确答案:D54.A child’s development might well be badly affected if ______.A.he was subjected to unusually strict disciplineB.his mother often gave in to his demandsC.his energies were freely given an outletD.he were brought up in a happy environment正确答案:A55.As it is presented in the passage, rather than a smooth progression the development of the human character and personality is a series of ______.A.actsB.stagesC.functionsD.completions正确答案:BSection BYour passport is your official identification as an American citizen. In America, most people never consider obtaining a passport unless they are planning a trip out of the country. A passport is final proof of identity in almost every country in the world. In 1979 almost 15 million Americans held passports. Most of these passports were obtained to travel outside the country because, except for a few Western nations, passports are required to enter every country. And if you travel abroad, you must have a valid passport to reenter the country. When traveling abroad, you will need a passport for identification when exchanging dollars for francs or marks or other foreign currency. You may also need your passport to use a credit card, buy an airplane ticket, check into a hotel or casino. Don’t confuse passports and visas. Whereas a passport is issued by a country to its citizens, a visa is official permission to visit a country granted by the government of that country. For some years, many countries were dropping their visa requirements, but that trend has reversed. Argentina, Brazil, and Venezuela now require visas from U.S. citizens. They may be obtained from the embassy of the country you wish to visit. Passport applications are available at passport agency offices in large cities like Boston, New York, or Chicago. In smaller cities, applications are available at post offices and at federal courts. To get your first passport, you must submit the application in person, along with a birth certificate and two pictures. Maybe because most Americans use their passports only when traveling and because they are good for five years, many people lose their passports. Any every passport is worth thousands of dollars to smugglers or criminals who desire to enter this country illegally or assume a false identity. Travelers should keep their passports in their pockets or pocketbooks at all times; never pack them or leave them in a room or automobile; when you arrive back home, store your passport in a safe or safety deposit box. And report a lost or stolen passport immediately; it is literally your identity.56.What is the main purpose of this passage?正确答案:To provide information about passports.57.Passports are needed when ______.正确答案:exchanging currency, using credit cards, checking into hotels, etc.58.Concerning passports and visas, what can we conclude from this passage?正确答案:Passports are more important than visas.59.What does the passage suggest about the importance of passports?正确答案:Most people don’t realize how important passports are.60.Where should travelers keep their passports?正确答案:In their pockets or pocketbooks.Section CHeat loss by sweating depends on the fact that when a liquid evaporates, it absorbs an enormous quantity of heat from its surroundings. Therefore, when 1 ml. of sweat evaporate, a great deal of heat is absorbed from the surface of the body in contact with it. This heat transfer occurs even if the environment is hotter than the body. Two factors affect the rate of evaporation of sweat, and therefore the effectiveness of sweating as a method of cooling the body. The first is the amount of movement of air surrounding the body. The second is the amount of water vapor in the air that surrounds the body. When air moves over the surface of water, the amount of evaporation is greatly increased. For this reason, sweat evaporates very rapidly on windy days, and the rate of heat loss by sweating is much more than on a still day. This accounts for the fact that hot still days are much less comfortable than hot windy days. In contrast, the sweat evaporates very rapidly on hot windy days, and cools the body quickly and effectively. The second factor is the amount of water vapor in the air--the humidity. When air is carrying the maximum amount of water vapor that it can hold, it is said to be 100% saturated with water vapor. The relative humidity of the air is said to be 100%. Under these conditions the air cannot carry any water, so no water can evaporate. When the relative humidity is high, therefore, sweat cannot evaporate. Instead, it forms large drops and runs off your skin without cooling you. When the air is very dry and carries no water at all, the relative humidity is said to be 0%. It is obvious that under these conditions, evaporation will be much more rapid. Therefore, sweating will be much more effective as a method of losing heat from the body. On a hot dry day, sweat evaporates as soon as it is formed, and you feel reasonably cool even though the temperature of your environment is very high.61.______ According to the passage, it can be inferred that housewives prefer to hang their washing on hot still days.A.TB.FC.NG正确答案:B62.______ People have good reasons to feel cool on a hot dry day because of quick evaporation.A.TB.FC.NG正确答案:B63.______ Hot windy days are much more comfortable than hot still days.A.TB.FC.NG正确答案:B64.______ On an extremely hot day, sweating to cool your body effectively will occur when the air is very hot and dry and carries no water at all.A.TB.FC.NG正确答案:A65.______ The heat transfer happens on the condition that the environment is cooler than the body.A.TB.FC.NG正确答案:A66.______ You might expect the highest incidence of a heat stroke when the maximum temperature is 100 and humidity is 50%.A.TB.FC.NG正确答案:CSection DThe most interesting architectural phenomenon of the 1970s was the enthusiasm for refurbishing old buildings. Obviously, this was not an entirely newphenomenon.【73】. A few trial efforts, such as Ghirardelli Square in San Francisco, proved their financial viability in the 1960s, but it was in the 1970s, with strong government support through tax incentives and rapid depreciation, as well as growing interest in ecology issues, that recycling became a major factor on the urban scene. One of the most comprehensive ventures was the restoration and transformation of Boston’s eighteenth century Faneuil Hall and the Quincy Market, designed in 1842. This section had fallen on hard times, but beginning with the construction of a new city hall immediately adjacent,【74】under the design leadership of Benjamin Thompson. He has provided a marvelous setting for dining, shopping, professional offices, and simply walking. Butler Square, in Minneapolis, exemplifies major changes in its complex of offices, commercial space, and【75】designed in 1906 as a hardware warehouse. The exciting interior timber structure of the building was highlighted by cutting light courts through the interior and adding large skylights. San Antonio, Texas,【76】. Rather than bringing in the bulldozers, San Antonio’s leaders rehabilitated existing structures, while simultaneously cleaning up the San Antonio River, which meanders through the business district. Sentences: A. offers an object lesson for numerous other cities combating urban decay B. What is new is the wholesale interest in reusing the past, in recycling, in adaptive rehabilitation. C. During the 1970s, old buildings in many cities were recycled for modem use. D. public amenities carved out of a massive pile E. It has returned to life with the intelligent reuse of these fine buildings.67.正确答案:B68.正确答案:E69.正确答案:D70.正确答案:APart ⅤTranslationSection A(89) For many women choosing whether to work or not to work outsidetheir home is a luxury: they must work to survive. Others face a hard decision. Perhaps the easiest choice has to do with economics. One husband said, “Marge and I decided after careful consideration that for her to go back to work at this moment was an extravagance (奢侈) we couldn’t afford”. (90) With two preschool children, it soon became clear in their figuring that with babysitters, transportation, and increased taxes, rather than having more money, they might actually end up with less. Economic factors are usually the first to be considered, but they are not the most important. The most important aspects of the decision have to do with the emotional needs of each member of the family. (91) It is in this area that husbands and wives find themselves having to face many confusing and conflicting feelings. (92) There are many women who find that homemaking is boring or who feel imprisoned (被囚禁) if they have to stay home with a young child or several children. On the other hand, there are women who think that homemaking gives them the deepest satisfaction. From my own experience, I would like to suggest that sometimes the decision to go back to is made in too much haste. There are few decisions that I now regret more. I wasn’t mature enough to see how much I could have gained at home. (93) I regret my impatience to get on with my career; I wish I had allowed myself the luxury of watching the world through my little girl’s eyes.71.正确答案:对许多妇女来说,可以在出门工作还是呆在家里进行选择是一种奢侈,因为他们要工作谋生。
1
The hot dog stand
location problem
热狗摊选址问题
Dan Teague and Floyd Bullard
丹蒂格 弗洛伊德布拉德
图1中是大学校园一角。图中标示出道路和两点之间的大致距离(单位:百英
尺)。你的同舍同学说服(convince)你在周末时候在某个道路交叉点(intersections)
摆个热狗摊。你希望小摊尽可能方便同学们。哪里是最合适的地点呢?
表1:校园一角
从问题开始
你觉得怎样才算是方便?在安置小摊时怎样进行优化。你想要这热狗摊尽可能
方便同学们。你想摆在哪里呢?比如,使学生们到小摊的平均距离最短?使到小摊
的最大距离最短?是否还有其他的条件需要考虑?
假如宿舍位于A,C,D,E和F点,A舍楼有200生,C和D各有300生,E
和F楼各有100生。是否要改装喜欢的小摊位置?在这个场景中其他变量怎样影响
你的模型?比如,沿一条道布置小摊,增加一条小道,或拥有两个热狗摊。
热狗摊选址
当向学生提出这个问题时,许多学生想知道关于校园的额外情况。比如教学楼
在哪儿?学生们能穿过草地吗?池塘周围有篱笆吗?是否有一个可以让所有住宿学
生出来聚集的场地?
这些提问不该被阻止(discoarage)。在实际生活中这些问题的答案,可能不仅有
意义,也可以决定热狗摊的选择最佳位置。然而,另一方面额外的信息会使得问题
更复杂。建模问题的最佳答案往往通过先求解问题的简单版本,然后逐步(gradually),
引入更多随机性和复杂性以修正模型的解。这里的问题经过了简化,学生提出的不
2
同解都基于没有更多的信息提供。我们可将校园图抽象为一个仅表现道路的网络用
以建模。并在交叉点之间的每条路上标记长度。图2描述一个这样的模型。
图2:
由于学生主要从宿舍到小摊,所以一个方法是算出从每个舍楼到每个可能的小
摊地点的距离。如表1的数据。列表示所有可能的小摊位置,行表示从宿舍楼到各
摊点位置的距离。同时,在表格中包括了,从舍楼到小摊位置的最大距离和从小摊
到舍楼的平均距离。
ACDEFMax.Avg.
A0787886.0
B3454554.2
C7016884.4
D8105784.2
E7650274.0
F8872085.0
G7883185.4
表1
基于表中数据,如果将热狗摊安在B点,那么没有哪个学生从舍楼到摊点需要
走超过500英尺的距离,放在A点则有学生要走800英尺。如果以最小化最远距离
就应该选择B点。而此时从各舍楼到摊点的平均距离是420英尺。如果放在E点,
则平均距离只有400英尺。所以如果以最小化平均距离为目标应该设在E点。
上面讨论了两个方案,最大化距离和平均距离,在本问题来看你认为哪一个更
好?哪一个点更好地综合了这两个方案?我们可用求和与乘积两种算法来做综合,
结果在表2中显示。
从表2中可以看到B点能综合满足最大化距离和平均距离两个方案。
ACDEFMax.Avg.Sum.Prod.
A0787886.014.048
B3454554.29.221
C7016884.412.435.2
D8105784.212.233.6
E7650274.011.028
F8872085.013.040
G7883185.413.443.2
表2
3
物质中心“解”
学生中,尤其是学习过物理的学生,总是想在校园图中寻找“物质中心”并选
择一个尽量接近的交叉点。
为找到校园的“物体中心”,我们可以用舍楼的坐标分别计算x坐标和y坐标的
平均值。也就是32044355x,003441155y。校园中
心坐标是(0.6,2.2),在图3中用星号表示。在道路上最接近中心的点是H。如果
热狗摊设在H点,到各舍楼的最大距离是6.8(到D点)而且平均距离是4.76,和
为11.56,乘积为32.365。这样看来B点仍旧是最佳点。H点做为解的最大吸引力是
如果可以开放给学生穿过草坪。
图3
最小平方解
学生中学过一些曲线拟合的知识总是想要用最小乘法。这样会渐“处罚”各点
以使距离放大。比如,距离3比距离2要坏上两倍,因为224而239。
根据这个测量,B点好,而A点糟(见表3)。注意E点是最小平均距离,但不
是平方和最小的点。将舍楼包含在内。舍楼的条件如何影响我们的选址?
ACDEFSS.
A07878226
B3454591
C70168150
D81057139
E76502114
F88720181
G78831187
表3
考虑舍楼容量
将舍楼容量包括进来的一个方法是将学生数加权到距离上。在这种情况下,选
址可能会更接近较大的舍楼而更远离容量小的舍楼。相比于用单位码来测量,我们
更愿意用(学生一码)来测量。也就是我们宁愿50个学生走100英尺,也不要100
校园
中心
C(4,4)
D(4,3)
H
(0,2.2)
B(0,4) E(0,0) F(-2,0) G(-2,1) A(-3,4)
4
学生走80英尺。加权的方法是用需要走过一段距离的学生数乘以这段距离。对应地,
我们可以在从A点发出的距离上乘以2,从C和发出的乘以3,E和F发出的乘以1,
这样可保持数字可控制的小,见表4。
ACDEFMax.Avg.SS.
A02124782412.01130
B6121545158.4446
C140368146.2305
D163057166.2339
E14181502189.8749
F162421202412.61277
G142424312413.21358
表4
当舍楼容量加以考虑后,我们有新的选点满足不同的条件。C点满足极小化最
大加权距离。因为C和D容量都比较大,所以满足最小平均加权距离,我们的加权
系统将热狗摊安置到靠近这两个舍楼的点上。
基于这两个条件C点看来是个更好的选择。
考虑两个摊点
当你想要设两个摊点,怎样改变你的选择?两个点就有21种不同组合考虑。我
也不需要讨论所有情况,因为有些点是不适合的选择。首先看A,B,C和D点,因
为这些点都比较靠近大舍楼,见表5。
ACDEFMax.Avg.SS.
AB0121545157.2410
AC0036883.4109
AD0305773.083
BC6034563.686
BD6304563.686
CD140057145.2270
对两个摊点,我们看这样的组合,B和D点满足极小化最大加权距离,而A和
但D点是极小的平均距离。
其他可考虑的情形
如果我们知道A和C是女生楼,D,E和F是男生楼,并且
只有30%的女生喜欢在你的小摊上吃热狗,而有80%的男生喜
欢吃,那么你的选点会有怎样的改变?
如果B和C点以及E和D点之间的路是上坡路,而上坡路
比下坡路难走一倍。你会怎样选点?
其它情景:紧急电话
如果不是设热狗摊而是设一个紧急电话亭,最大距离和平均距离哪个是更好的
5
条件?将每个舍楼的学生数加权在距离上是否是最好的?你是否想将电话设在舍楼
边上或者靠近学生聚集处?在哪里设置一个紧急电话?设两个紧急电话呢?
新闻报纸
如果想要分发报纸到各个舍楼,让每个学生能获得报纸的复平。报纸将被分发
到一个中心depository,你要从这个地点取报纸送到舍楼。每次你只要取100份。需
要在哪里选点来分发1000份报纸以最小化你走的全部距离?