2003年全国中学生英语能力竞赛（NEPCS）决赛初三组试题
（时间：120分钟总分：150分）
听力部分（共四大题，计30分）
I．听辨单词（Words）（共5小题，计5分）
在下列各组单词中选出所听句子里含有的那个选项。每句只读一遍。（答案涂在答题纸上）
1．A．difficult B．digital C．different D．dangerous
2．A．secret B．scenery C．society D．science
3．A．produce B．prevent C．practise D．protect
4．A．flying B．flowing C．following D．falling
5．A．weather B．whenever C．wherever D．whether
II．句子理解（Sentences）（共5小题，计5分）
从下列各组句子中选出与你所听到的句子所表达的意思相同或相近的选项。每句只读一遍。（答案涂在答题纸上）
6．A．Excuse me．Could you tell me what China Hotel is，please？
B．How do you know where China Hotel is，sir？
C．Would you tell me how I can get to China Hotel，please？
D．Excuse me．Can I get to China Hotel，sir？
7．A．You can leave here after you finish your work．
B．Leave your work alone．
C．Before you leave，come here．
D．Finish your work first，then take a break．
8．A．Tony hurried to catch the train to see the football game yesterday．
B．Tony was thinking about yesterday's game．
C．Tony was very sorry about losing the game yesterday．
D．Tony said sorry to his classmates about yesterday's game．
9．A．How do you say the word in Japanese？
B．Why do you show this to me？
C．What does it seem to be？
D．What does the word“showing”mean？
10．A．Turn off the lights，though the room is dark．
B．Please keep the lights on when you leave the room．
C．Turn on the lights when you enter the room．
D．Don't forget to turn off the lights when you leave the room ．
III．对话理解（Dialogues）（共10小题，计10分）
A）你将分别听到五段小对话，针对每段对话将提出一个问题，从下面每组图片中选出能回答所提问题的最佳选项。对话及问题只读一遍。（答案涂在答题纸上）
11．A. B. C. D.
12．A. B. C. D.
13．A. B. C. D.
14．A. B. C. D.
15．A. B. C. D.
B）你将听到一段对话和对话后的5个问题，请根据对话和问题选择各题的最佳答案。对话和问题将读两遍。（答案涂在答题纸上）
16．A．It's singing while listening to the music．B．It's dancing along to the music．
C．It's playing music．D．It's singing by yourself．
17．A．A mobile phone．B．A microphone．C．Microsoft．D．A motorbike．
18．A．In Beijing．B．In New York．C．In Hong Kong．D．In Tokyo．
19．A．Western pop songs．B．Traditional Japanese songs．
C．Frank and Phil．D．Madonna's songs．
20．A．Because it's very easy and cheap．
B．Because it may make them become popular．
C．Because it's a way of showing friendship．
D．Because it's a chance to make a fool of themselves．
IV．短文理解（Passages）（共10小题，计10分）
A）你将听到一篇短文及短文后的4个问题，请根据短文内容及问题选择各题的
最佳答案。短文和问题将读两遍。（答案涂在答题纸上）
21．A．Because her parents wanted to go on holiday alone．
B．Because she had some studying to do．
C．Because she had to go to school．
D．Because she had to take care of the house．
22．A．One month．B．Half a month．C．Four days．D．One week．
23．A．She would do lots of homework．B．She would go walking．
C．She would do the cleaning．D．She would take part in sports in the park．
24．A．When she was phoning．B．When she was swimming．
C．When she was cooking and cleaning．
D．When she was seeing film s and m eeting her friends．
B）你将听到一篇短文及短文后的6个问题，请根据短文内容及问题选择各题的最佳答案。短文和问题将读两遍。（答案涂在答题纸上）
25．A．East London．B．North Macao．
C．South Paris．D．West Toronto．
26．A．40．B．65．C．60．D．50．
27．A．Flowers．B．Jackets．C．Toys for children．D．Vegetables and fruit．
28．A．Columbia Road．B．Brick Lane．C．Petticoat Lane．D．Whitechapel．
29．A．On Sunday．B．On Friday．C．On Saturday．D．On Monday．
30．A．It's next to the Columbia Road．
B．It's right by the post office．
C．It's opposite a hospital．
D．It's in the underground station．
笔试部分（共八大题，计120分）
I．选择填空（Vocabulary and structure）（共20小题，计20分）
A）从A、B、C、D四个选项中，找出可以填入各题空白处的最佳选项。（答案涂在答题纸上）1．Although the girl is only eight years old，she can do the cooking herself．The word
“herself”in the sentence means ．
A．by her B．without help C．lonely D．along
2．After making such a fool of myself，I'll never be able to show my face in there again．The Chinese for“show my face”in this sentence is ．
A．做秀B．丢脸C．尊严D．露面
3．Li Xiuming was to stay at home two weeks because he had visited a suspected（疑似）SARS patient in May．
A．told；at least B．saying；less C．speaking；mostly D．talked；almost
4．Amy，you may go skating after your homework ．
A．has finished B．will finish C．is finished D．was finished
5．It took the scientists seven days to Takla Makan“the sea of death”．
A．climb；calling B．through；called C．across；naming D．cross；named
6．There is only one ticket for both of us．you I can go into the cinema．
A．Both；and B．Not only；but also C．Either；or D．Neither；nor
7．David told me important information he on the Internet．
A．what an；searched B．what；got
C．how；typed D．how an；downloaded
8．The wind is blowing ，the rain is on the way．
A．hard；heavy B．big；large C．great；most D．strong；heavily
9．If you robbed，whom you ask help？
A．will be；will；for B．will be；do；to C．are；will；for D．are；do；to
10．All beepers and mobile phones must during the meeting we can hear the report clearly．
A．keep away；ever since B．not open；until
C．be kept closed；if D．be turned off；so that
11．—Are you going to dive now？
—No，I'd prefer because we don't know the depth of the water．
A．not to B．to go C．like to D．going
12．SARS teaches people to be thankful，not only for their own lives，but also for ．
A．another's B．others'C．the other D．some other
13．You are watching television when someone asks you：Would you mind turning down the sound，please？As you do so，you say：．
A．Of course I do B．Yes，I would
C．No，of course not D．No，I don't turn it down
14．As you're leaving a shop the assistant says，“Have a nice day！”You say：．
A．Thank you．Same to you．Bye B．Congratulations to you
C．No，thanks．I've made other plans D．Take your time，see you
15．The sign“THIS SIDE UP”is often seen ．
A．in a lift B．at a theatre C．on a box D．in the street
B）下面5道小题可以组成一篇小短文（首句已给出），请根据上下文和所给选项选出各题的最佳选项。（答案涂在答题纸上）
Come with me，and I will help you find some of nature's secrets．Let's go quickly through the woods and fields．
16．Here we shall find a rabbit tells the other rabbits that there is danger．
A．what B．how C．why D．which
17．We shall follow a mother bear and her young ones as they search for food and get ready for their long winter ．
A．work B．trip C．holiday D．sleep
18．We shall watch bees dancing in the air the other bees where they can find food．
A．to let；know B．make；see C．let；to see D．to make；to know
19．I will show you many other interesting things，but the thing that I can teach you is to keep your eyes open when you go out．
A．delicious B．well C．most D．best
20．Nature her secrets only to people who look and listen carefully．
A．asks B．follows C．tells D．finds
II．阅读理解（Reading comprehension）（共30小题，计30分）
阅读下列短文或图表，按要求完成文后各题。（21—30小题为选择题，每题只有一个最佳选项，请将答案涂在答题纸上；31—50小题为非选择题，请将答案写在答题纸上。）
（A）
The most important day Helen Keller remembered in all her life was the one on which her teacher，Anne Sullivan，came to her．It was three months before she was seven years old．
On the afternoon of that day，Helen knew that something was happening．She went outside and waited at the door of the house．She could feel the sun on her face and she could touch the leaves of the plants．Then she felt someone walking towards her．She thought it was her mother and she went to her and held her close．This was the teacher who had come to teach all things to her and，above all，to love her．
The next morning，the teacher took her into her room and gave her a doll．When Helen was playing with it，Miss．Sullivan slowly spelled the word“d－o－l－l”onto her hand．Helen learnt a lot of words like this．After the teacher had been with her for several weeks，Helen understood that everything had a name．
One day Helen didn't understand the difference between“mug”and“water”．She became angry and threw the doll on the floor．In her quiet，dark world she didn't feel sorry for doing it．Then her teacher took her out into the warm sunshine．They walked down to the well where someone was drawing water．Her teacher put her hand under the water and spelled the word“w－a－t－e－r”at the same time in her other hand．Suddenly，Helen felt an understanding．She knew then that“w－a－t－e－r”was the wonderful cool something flowing over her hand．That living word awakened her spirit，gave it light，hope，fun and set it free！
21．How was the girl different from other children？
A．She didn't know how to play games．
B．She was angry all the time．
C．She couldn't speak．
D．She was deaf and blind．
22．Helen Keller's age was when she met Miss．Sullivan．
A．five B．under six C．above six D．seven
23．Why was her teacher so important to her？
A．Because her teacher loved her and taught her．
B．Because her parents were both dead．
C．Because she wanted to go to university．
D．Because there was nobody to play with her．
24．Helen learnt new words when ．
A．she went to the well
B．Miss．Sullivan spelled them on her hand
C．the teacher gave her a doll
D．she knew the difference between two words
25．What can the reader learn from the passage？
A．How to spell different words and understand their meanings．
B．The way to feel sorry for doing something wrong．
C．The idea of how to describe things and make them feel real．
D．When someone is drawing water，we should go to feel it．
（B）
People think being an artist must be a wonderful way to make one's living．And of course，there are lots of great things about working for oneself，at home，alone．What I really like is that nobody tells me what time to start in the morning，or what to wear，or whether I can take the afternoon off and go to a football match．
But then，I have no one to talk with，no one to discuss last night's match with during the lunch-hour．Sure，I can spend the afternoon doing something I enjoy like swimming，or walking the dog，or even sleeping，if I choose．But the work will still be there when I get back home．And it's still got to be finished in time．
Working at home means that people can always find me，once I've answered the doorbell，it's too late—my thoughts have been stopped．No one would dream of calling in if I worked in an office，but I find myself making cups of coffee and listening to friends' troubles．As they talk，my ideas disappear．
26．The writer is writing the passage to ．
A．encourage readers to work at home B．explain why he has changed his job
C．describe his working life D．say how he would like to work
27．The reader can learn from the passage．
A．how to start working for oneself
B．what it's like to work at home
C．why the writer worked for himself
D．how artists do well
28．What does the writer like about his life？
A．He has a lot of time for sport．
B．He is his own manager．
C．He can see people when he wants to．
D．He has a comfortable place to work at．
29．When do the writer's ideas disappear？
A．When he answers the letter．
B．When he goes to the swimming pool．
C．When his friends are drinking coffee．
D．When his friends talk．
30．Which of these notices would be most useful for the writer to put on his door？
（C）
Seven Modern Wonders of the World
The Panama Canal，begun in the 1880s，wasn't finished until 1914．It joins the Atlantic and Pacific oceans．Engineers describe the canal as a victory of humans over geography．
For 40 years after it was completed in 1931，the Empire State Building，in New York City，was the tallest building in the world．Amazingly，this 102-story building was completed in just 410 days．
The Netherlands North Sea Protection Works is another victory over
geography．The Netherlands，which is below sea level，was often flooded by the
North Sea and by rivers．Then，between 1927 and 1932，a dam was built to shut out the sea．Twenty years later，dams and canals were built to control the rivers．
The Golden Gate Bridge，completed in 1937，was alsovery hard work for workers：San Francisco Bay has very strong winds and rough waves．The Golden Gate is still the world's tallest bridge．It has enough steel to go around the world three times．
At 1，815 feet，the CN Tower，in Toronto，Canada，is one of the world's tallest free-standing buildings．Completed in 1976，the tower is used for TV and radio broadcasting．
The Itaipú Dam，completed in 1984，goes across the Parana River at the Brazil— Paraguay border．It is the world's largest hydroelectric plant．
Completed in 1994，the Channel Tunnel joins France and England．The“Chunnel” is a great convenience：Cars，buses，and trucks are all carried through the tunnel by train．
Fill in the blanks with one or two words according to the information above．
31．The joins two bodies of water．
32．The Empire State Building was the tallest building in the world for ．
33．The CN Tower is high．It's higher than Empire State Building．
34．The dam in Netherlands was built from 1927 to ．
35．It was difficult to complete the Golden Gate Bridge because there were and rough waves．
36．The Itaipú Dam crosses the borders of and Paraguay．
37．If you go to England from France，you can take your car or truck through the Channel Tunnel ．
（D）
Use the newspaper TV guide to fill in the blanks．
38．You may watch Channel to find out the weather report．
39．What sport do the New York Wolves play？．
40．The Cooking Show starts on Channel 6on Monday night．
41．The name of Monday night's show is ：The Life and Times of John
F．Kennedy．
42．How long does the film Star Battle last on Monday night？．
43．If you want to learn more about lions，which channel may you turn
to？．
（E）
Many North Americans love sport．This does not necessarily mean that they get any exercise．What they do is watch national teams on television．They watch baseball，football，basketball，hockey，golf and tennis—which means that for most of the weekends they sit in front of the television．If they are friendly，their friends watch with them．
Baseball is the great American sport and every team has fans．Nearly every big city has a team ，and as each team plays 162 games a year，following baseball can take up a lot of time．The playing season begins in spring and finishes in the fall World Series，when the two leading teams play each other．The first to win four games wins the Series．Although called the World Series，Canada is the only other country to take part in it．
Football，played in fall and winter，is also very popular．It is not at all like the game called soccer．There isn't much kicking in American football，which has more to do with running with the ball and knocking people
down．Each team only plays 16games during the season，and these take place on Sundays and Monday evenings．Half the country watches the final game on a Sunday，in January．
When there are no good games on television，Americans watch college sports．Many colleges feel that if they want their former students to give money to their old schools，they need a winning football team．To our surprise，this seems to be true．
Answer the following questions according to the passage．
44．When do Americans and their friends sit to watch games on TV？
45．Which two sports are the most popular in the USA？
46．How many countries are there in the World Series？
47．When is the baseball season in America？
48．When is the final football game held in the USA？
49．Why are college teams important for colleges in America？
50．What does the word“former”mean in Chinese？
III．完形填空（Cloze）（共15小题，计15分）
A）阅读下面短文，根据其内容从所给的12个单词中选出最恰当的8个填入空中。（答案写在答题纸上）
already；any；businessman；but；died；early；how；
remember；scientist；still；understand；when
If you ask many people to name a twentieth century artist，they will tell you“Picasso”．
Although he was born in 1881 and（51）in 1973，the public（52）think of his work as modern art．His（53）paintings look traditional to us now，but his later work is less easy to（54），even seventy years after he did it．One thing we students should（55）about Picasso is that he enjoyed a joke．This is clear （56）we look at the drawings he made of dishes and pots．When we try to understand the importance of Picasso，we must not forget that he was a clever（57）as well as a great artist．Although poor when young，he was good at selling his work，and he became very rich．He believed he was a great artist，and he could make other people think that he was，too．Some people feel that there are other twentieth century artists who should be as famous as he is，（58）this can only be decided in the future．
B）根据文章内容及首字母提示用最恰当的词完成下文。（答案写在答题纸上）
In England，tea is not just a drink，it's a m （59）as well．In some homes it's the last meal of the day，although for many people it's a l （60）meal between lunch and d （61）．But，for most people at work，there isn't time to s （62）for afternoon tea．Most tea shops serve afternoon tea b （63）three and five in the afternoon，although the most popular t （64）is around four o'clock．So，an English tea is good for people on holiday who have time to enjoy it．Why not try to taste a special English tea in that most English of cities，Oxford？After a long day v （65）the wonderful city，enjoy yourself at one of the many tea shops．
IV．句式转换（Sentence pattern transformation）（共10小题，计10分）
A）按要求转换下列句式，每空词数不限。（答案写在答题纸上）
66．You shouldn't be late for the meeting any more．（改为祈使句）
late for the meeting any more，please．
67．My neighbour，Peter，is tall and thin．（改为特殊疑问句）
does your neighbour，Peter，look ？
68．Someone saw her practise dancing at the foot of the hill．（改为被动语态）
She dancing at the foot of the hill．
69．I think there is something wrong with the digital camera．（改为否定句）
I there anything wrong with the digital cam era．
70．It's ten years since the Littles started to work in China．（改为现在完成时）
The Littles in China for over ten years．
B）根据上句完成下句，使两句表达的意思基本相同，每空一词。（答案写在答题纸上）
71．Fred would rather live on a boat than in a house．
Fred living on a boat living in a house．
72．I like the book and think others should read it，too．
That book is ．
73．You really shouldn't spend so much time playing computer games．
It's of time playing computer games．
74．We are going to the mountains so that we can enjoy the cool weather．
We are going to the mountains the cool weather．
75．The boy found the university，although nobody told him the way．
The boy found the university anybody him the way．
V．动词填空（Fill in the blanks with verbs in their proper forms）（共10小题，计10分）
A）阅读短文并用括号内所给动词的适当形式填空。（答案写在答题纸上）
Joan Chen is famous both in China，where she grew up，and in the United States，where she now
（76）（live）．How did Joan become a famous actress in two countries？It's an interesting story．
Joan Chen was born in Shanghai in 1961．When she was 14，some people from a film company came to her school and（77）（encourage）her to study acting．She was happy about this chance．At the age of 18，
she won the Golden Rooster，China's top film award．
In late 1970，she moved to America．Her parents hoped she（78）（study）medicine．Instead she looked for work as an actress．She had to start all over again．One day she went to speak to a director，but the interview（79）（not go）well．As she walked away，a man in a car noticed her．The man was Dino Dalaurentiis，the film 's producer．He offered her a（80）（lead）part．A year later，she starred in Bernardo Bertolucci's The Last Emperor．
B）从所给的8个动词中选出5个最恰当的并用其适当的形式填入文中空白处。（答案写在答题纸上）
buy；he ar；invent；keep；see；serve；start；work
The telephone was invented in March 1876by Alexander Graham Bell，a teacher who lived in Boston，Massachusetts．One day Bell and Watson，a worker，were in different rooms（81）on their new invention．Bell said，“Come here．I want you，”and Watson（82）these words on the telephone in the other room ．
Soon Bell（83）his own company，the Bell Telephone Company．Other small telephone com panies were started in towns and cities all over the U．S．In 1900，the American Telephone and Telegraph Company（AT ＆T）（84）the Bell Telephone Company．Within a few years，80 percent of the telephone customers in the United States（85）by AT＆T．
VI．翻译（Translation）（共10小题，计10分）
A）把短文中的划线部分译成汉语。（答案写在答题纸上）
DON 'T WORRY －JUST SMILE！
You don't speak the language？Don't worry，just smile！It's easy to communicate when you travel abroad．（86）Smile，look at people in a friendly way and point at things and people will understand you．Or will they ？（87）People in different countries request things in different ways．
●The British say“Please”and“Thank you”more than the Americans．（88）When they buy som ething the British may say“Thank you”two or three times during the talk．Most Ameri cans say“Thank you”once．
●Americans always say“You're welcome”as a reply after“Thank you”．（89）The British sometimes reply“Thank you”，or sometimes do not reply．
●（90）In Southern Europe，a smile，friendly body language and eye contact are very important when you're requesting something．
B）借助所给词语将下列句子译成英语。（答案写在答题纸上）
91．你认为中学生应该做些什么来改善我们的环境？（think；improve）
92．有些地方，沙滩上有了望塔，提醒人们水中有鲨鱼。（watchtowers；warn．．．about）
93．如果你想在网上看三亚的信息，请点击“三亚”按钮。（click on）
94．那位电影明星以她精湛的演技而著名，而我父亲以写作而出名。（fine acting；while）
95．噪声污染迫使人们更加高声地交谈并使得他们更容易恼火。（noise pollution；force．．．to）
VII．智力测试（IQ）（共5小题，计5分）
完成下列英语智力题。（答案写在答题纸上）
96．What is easy to get into but hard to get out of ？
97．Take away my first letter，take away my second letter，take away all my letters，and I'm still the same．What am I？
98．Find a four-letter word which，when put in front of these words，makes new words．
99．How many children has Albert？
100．Which two pairs of shapes are exactly the same？
VIII．写作（Writin g）（共2小题，计20分）
要求：1．根据提供的内容，适当拓展想象空间，灵活地将提供的信息体现在文章中；2．条理清楚，语句通顺，标点正确，书写清晰、规范；3．不得少于规定的词数。（写在答题纸上）
（A）
请将以下对话内容改写成短文，该短文要求包括正（For）反（Against）两方面的观点，讨论一下猫能否成为好的宠物。词数要求在60—100之间。
A：Hi，Alex！
B：Hi，Sarah！What have you got in the box？
A：Look！It's my new pet cat．Isn't it great？
B：I don't think having a pet cat is a good idea．When they get angry，they scratch（抓）you．
A：You're wrong．I think they are beautiful and friendly．
B：A dog is a better pet．They can look after the house，cats can't．
A：But a cat can clean itself，a dog can't．
B：You can't take a cat for a walk．Cats won't come to you when you call their names．
A：But they make a happy sound and they don't need a lot of food．
B：Another reason why I think cats do not make good pets is that they kill and eat small birds and animals．
（B）
Bruce and Carlos are middle school students．They often discuss how to learn English well by email．Please finish Bruce's email to Carlos with about 70 words．Give your ideas about the best way of studying English．
第27届全国中学生物理竞赛复赛试卷本卷共九题，满分160分．计算题的解答应写出必要的文字说明、方程式和重要的演算步骤．只写出最后结果的不能得分．有数字计算的题．答案中必须明确写出数值和单位．填空题把答案填在题中的横线上，只要给出结果，不需写出求解的过程． 一、（15分）蛇形摆是一个用于演示单摆周 期与摆长关系的实验仪器（见图）．若干个摆球位于同一高度并等间距地排成一条直线，它们的悬挂点在不同的高度上，摆长依次减小．设重力加速度g=9.80 m/s2, 1．试设计一个包含十个单摆的蛇形摆（即求出每个摆的摆长），要求满足：(a）每个摆的摆长不小于0.450m，不大于1.00m;(b）初始时将所有摆球由平衡点沿x轴正方向移动相同的一个小位移xo(xo<<0.45m)，然后同时释放，经过40s后，所有的摆能够同时回到初始状态． 2．在上述情形中，从所有的摆球开始摆动起，到它们的速率首次全部为零所经过的时间为________________________________________. 二、（20分）距离我们为L处有一恒星，其质量为M，观测发现其位置呈周期性摆动，周期为T，摆动范围的最大张角为△θ．假设该星体的周期性摆动是由于有一颗围绕它作圆周运动的行星引起的，试给出这颗行星的质量m所满足的方程．若L=10光年，T=10年，△θ=3毫角秒，M=Ms（Ms为太阳质量），则此行星的质量和它运动的轨道半径r各为多少？分别用太阳质量Ms和国际单位AU（平均日地距离）作为单位，只保留一位有效数字．已知1毫角秒=角秒，1角秒=度，1AU=1.5×108km,光速c=3.0×105km/s.
2018年全国初中学生化学素质和实验能力竞赛 （第十八届天原杯）复赛试题 试题说明：1.本试卷共8页，满分100分。（附加题供选用） 2.可能用到的相对原子质量： H:1 C:12 N:14 O:16 F:19 Na:23 Al:27 S:32 Cl:35.5 K:39 Ca:40 Mn:55 Fe:56 Cu:64 Zn:65 Ba:137 3.考试时间：2小时 一、选择题(本题包括15个小题，每小题2分，共30分。每小 题有1个或2个选项符合题意。若有两个答案的错1个不得分， 1．2018年10月24日，我国使用“长征三号甲”运载火箭将“嫦娥1号”送上月球轨道，其任务之一是探测月球上氦–3（质子数为2， 中子数为1的原子）资源。下列氦–3原子的原子结构示意图中正确的是（ ） 2．第29届奥林匹克运动会将于2018年8月8日在北京举行。下列措施不符合绿色奥运理念的是（ ） A ．奥运场馆周围的路灯采用太阳能光伏发电技术 B ．在奥运场地使用电动汽车和新型清洁燃料汽车 C ．场馆附近的绿化采用微灌或滴灌智能控制技术 D ．将奥运村的生活垃圾全部集中深埋 3．1991年碳纳米管被发现。碳纳米管是由石墨中的碳原子层卷曲而成的管状的材料，管的直径一般为几纳米到几十纳米，管的厚度仅为几纳米。碳纳米管由于其独有的结构和奇特的物理、化学特性以及潜在的应用前景而受到人们的关注。下列有关碳纳米管的说法中正确的是（ ） A ．碳纳米管是一种新型的高分子化合物 B ．碳纳米管的化学性质常温时很稳定 C ．碳纳米管导电属于化学变化 D ．碳纳米管的结构和性质与金刚石均相同 4．闪电时空气中有臭氧（O 3）生成。下列说法中正确的是（ ） A ．O 3和O 2混合得到的是纯净物 B ．O 2比O 3稳定 C ．等质量的O 3和O 2含有的氧原子数之比是2︰3 D ．O 3与O 2的相互转化是物理变化
i’ m very glad to stand here to share my speech with you. today my topic is failure is the mother of success i am an ordinary girl from a rural family .i am less excellent than other childred in the citise , and not so talented. but i show my confidence in the stage.i don`t expect that i have much success .i don`t require myself how good ! believe that i try my best to do it by using my heart. although it would be a failure experience .i won`t regret it .i still believe strongly in trying my best to do it. failure is nothing,because i know the failure is the mother of success. even if i fail .i can be pround of saying:” i `m confident,i `m happy.” thank you very much !!!!! i’ m very glad to stand here to share my speech with you. today my topic is my hometown i was born in a beautiful village.there are high mountains, beautiful fields,and clear rivers.my grandparents and parents have lived there for many years. i can see the rope flowers in front of my house every spring and enjoying feeling.the reason is that i can close my eyes and embrace the blue sky,quietly listen to the sound of nature.it is a kind of beauty to enjoy myself. one day i hope i can change my hometown into a scenic spot .let more people know her beauty.so i work harder in order to change my hometown ,i can do it.i love my
第26届全国中学生物理竞赛复赛试卷 一、填空（问答）题（每题5分，共25分） 1．有人设想了一种静电场：电场的方向都垂直于纸面并指向纸里，电场强度的大小自左向右逐渐增大，如图所示。这种分布的静电场是否可能存在？试述理由。 2．海尔-波普彗星轨道是长轴非常大的椭圆，近日点到太阳中心的距离为0.914天文单位（1天文单位等于地日间的平均距离），则其近日点速率的上限与地球公转（轨道可视为圆周）速率之比约为（保留2位有效数字） 。 3．用测电笔接触市电相线，即使赤脚站在地上也不会触电，原因是 ；另一方面，即使穿绝缘性能良好的电工鞋操作，测电笔仍会发亮，原因是 。 4．在图示的复杂网络中，所有电源的电动势均为E 0，所有电阻器的电阻值均为R 0，所有电容器的电容均为C 0，则图示电容器A 极板上的电荷量为 。 5．如图，给静止在水平粗糙地面上的木块一初速度，使之开始运动。一学生利用角动量定理来考察此木块以后的运动过程：“把参考点设于如图所示的地面上一点O ，此时摩擦力f 的力矩为0， 从而地面木块的角动量将守恒，这样木块将不减速而作匀速运动。”请指出上述推理的错误，并给出正确的解释： 。 二、（20分） 图示正方形轻质刚性水平桌面由四条完全相同的轻质细桌腿1、2、3、4支撑于桌角A 、B 、C 、D 处，桌腿竖直立在水平粗糙刚性地面上。已知桌腿受力后将产生弹性微小形变。现于桌面中心点O 至角A 的连线OA 上某点P 施加一竖直向下的力F ，令 c OA OP ，求桌面对桌腿1的压力F 1。
三、（15分） 1．一质量为m 的小球与一劲度系数为k 的弹簧相连组成一体系，置于光滑水平桌面上，弹簧的另一端与固定墙面相连，小球做一维自由振动。试问在一沿此弹簧长度方向以速度u 作匀速运动的参考系里观察，此体系的机械能是否守恒，并说明理由。 。 2．若不考虑太阳和其他星体的作用，则地球-月球系统可看成孤立系统。若把地球和月球都看作是质量均匀分布的球体，它们的质量分别为M 和m ，月心-地心间的距离为R ，万有引力恒量为G 。学生甲以地心为参考系，利用牛顿第二定律和万有引力定律，得到月球相对于地心参考系的加速度为2R M G a m =；学生乙以月心为参考系，同样利用牛顿第二定律和万有引力定律，得到地球相对于月心参考系的加速度为 2R m G a e =。这二位学生求出的地-月间的相对加速度明显矛盾，请指出其中的错误，并分别以地心参考系（以地心速度作平动的参考系）和月心参考系（以月心速度作平动的参考系）求出正确结果。 四、（20分）火箭通过高速喷射燃气产生推力。设温度T 1、压强p 1的炽热高压气体在燃烧室内源源不断生成，并通过管道由狭窄的喷气口排入气压p 2的环境。假设燃气可视为理想气体，其摩尔质量为μ，每摩尔燃气的内能为u =c V T （c V 是常量，T 为燃气的绝对温度）。在快速流动过程中，对管道内任意处的两个非常靠近的横截面间的气体，可以认为它与周围没有热交换，但其内部则达到平衡状态，且有均匀的压强p 、温度T 和密度ρ，它们的数值随着流动而不断变化，并满足绝热方程C pV V V c R c =+（恒量） ，式中R 为普适气体常量，求喷气口处气体的温度与相对火箭的喷射速率。
2013年全国初中学生化学素质和实验能力竞赛(第23届天原杯)复赛试题 可能用到的相对原子质量:H-1 C-12N-14 O-16 Na-23 Mg-24 Al-27 S-32 Cl-35.5 K-39 Mn-55 Fe-56 Cu-64 Zn-65 Ag-108 Sn-119 Hg-201 Pb-207 一、选择题(每小题2分,共30分,有1个或2个选项符合题意) 1、2013年世界地球日的主题是"多样的物种,唯一的地球,共同的未来".下列描述符合这一主题的是( ) A.为粮食增产,多施高效化肥、农药 B.霾是一种自然现象,对人体健康影响不大 C.大力推广新型材料 D.努力实施绿色化学,把化学对环境的负面影响减少到最低 2、化学概念相互间存在如下3种关系,下列对概念间关系的说法正确的是( ) A.纯净物与混合物属于包含关系 B.化合物与氧化物属于包含关系 C.单质与化合物属于交叉关系 D.氧化反应与化合关系属于并列关系 3、过氧化氢是常见的过氧化物,下列物质也属于过氧化物的是( ) A.MnO 2 B.CaO 2 C.NO 2 D.SiO 2 4、晋代葛洪的《食肉方》(去除黑痣的药方)中记载:"取白炭灰(石灰)、 荻灰(草木灰)等分煎合……"可去黑痣.起到食肉作用的主要物质是( ) A.碳酸钙 B.熟石灰 C.碳酸钾D.苛性钾 5、生物体死亡后,体内含有的碳-14会逐渐减少,(称为衰变)因此科学家可通过测量生物体遗骸中碳-14的含量,来计算它存活的年代,这种方法称之为放射性碳测年法.碳-14原子核中含6个质子与8个中子,在衰变时,一个中子变成质子,形成新的原子核.下列关于新原子核的说法正确的是( )A.碳原子核,含7个质子,8个中子 B.氮原子核,含7个质子,7个中子 C.碳原子核,含6个质子,7个中子 D.氧原子核,含7个质子,8个中子 6、取4份等质量的KClO 3,向其中3份中分别加入少量等质量的KMnO 4、MnO 2和Mn,分别在某温度下加热至质量不再改变,测定产生的氧气的质量.然后,将剩余固体溶于足量水中,添加过物质的组别中均有相同组成的不同物.测定结果如下: 已知m1＞m2＞m3,下列关于此实验的说法一定正确的是( ) A.3种物质的加入都有利于KClO 3分解制氧气 B.残留不溶物的质量关系为m1＜m2＜m3 C.KMnO 4是KClO 3分解制氧气效果最好的催化剂 D.不加入其它物质时,KClO 3未发生分解反应 7、下列各组微粒中,属于同一种元素的是( ) 8、下列变化过程一定发生化学反应的是( )A.燃烧 B.爆炸 C.颜色发生了改变 D.状态发生了改变 9.将硅粉与镁粉混合后隔绝空气强热,得到一种暗蓝色的化合物.将此化合物投入水中,发生剧烈反应,产生气体,并伴有爆炸声与火光.此过程不可能发生的反应是( )A. B. C. D. 10、甲、乙两种固体物质的溶解度如图1所示.常温下,分别向装有适量甲、乙物质的两支试管中加入等量的蒸馏水,充分振荡后,两支试管底部都均有未溶解的固体;再将两支试管放入盛有冰水混合物的烧杯里,如图2所示.关于该实验,下列说法正确的是( ) A.乙溶液中溶质的质量分数增大 B.装有甲物质的试管中剩余的固体减少 C.甲、乙两物质的溶解度都增大 D.两支试管里剩余的固体都增多 11、如上右图下列CO 2的制备装置中,不能起到"随开随用,随关随停"效果的是 12、某同学想要知道10g 食盐的体积,他应该采用的方法是( ) A.将食盐放入空量筒中,观察表面对应刻度的变化 B.将食盐放入装有水的量筒中,观察液面对应刻度的变化 C.将食盐放入装有沙子的量筒中,观察表面对应刻度的变化 D.将食盐放入装有饱和食盐水的量筒中,观察液面对应刻度的变化 13、3种无色溶液,溶质分别为硫酸铵、氯化钠和碳酸钾.3位同学设计的鉴定方案如下: 甲:各加入少量盐酸,有气体产生的是碳酸钾.然后向明显现象的试管中滴加少量氯化钡溶液,有沉淀产生的是硫酸铵,无沉淀产生的是氯化钠 乙:各加入足量烧碱溶液,加热,的气体产生的是硫酸铵.然后向明显现象的试管中滴加少量硝酸银溶液,再加入少量稀硝酸,有沉淀产生的是氯化钠,无沉淀产生的是碳酸钾 丙:各加入少量氯化钡溶液,再加入少量稀硝酸,有沉淀产生的是硫酸铵,然后向明显现象的试管中滴加少量硝酸银溶液,有沉淀产生的是氯化钠,无沉淀产生的是碳酸钾 A.只有甲 B.甲和乙 C.乙和丙 D.甲和丙 14、现有失去标签的氯化钙、硝酸银、盐酸、碳酸钠4种无色溶液.将它们编号为甲、乙、丙、丁后,两两混合的现象如下表所示.根据实验现象判断甲溶液中的溶质的化学式是( ) A.CaCl 2 B.AgNO 3 C.HCl D.Na 2CO 3 15、将5.4g 金属铝投入一定量的混合盐溶液中,反应后可得到36.0g 金属单质(无气体产生).则原混合盐的组成可能为: ( ) A.Pb(NO 3)与2Hg(NO 3)2 B.Fe(NO 3)2和Zn(NO 3)2 C.AgNO 3与Cu(NO 3)2 D.Sn(NO 3)2与Mg(NO 3)2 二、填空题 16、(4分)生活与化学密切相关,处处充满着化学知识. (1)下列食物中,能提供大量维生素的是( )(填标号)A.牛奶 B.大米 C.蔬菜 (2)加钙牛奶中的钙是指钙元素,身体中一旦缺钙,可能患有的疾病是( )(填"骨质疏松"或"贫血") (3)下列物品中,所使用的主要材料属于天然纤维的是( )(填标号)A.橡胶手套B.棉布围裙 C.塑料保鲜膜 (4)我们常用洗涤剂清洗餐具上的油污,这是因为洗涤剂具有( )功能. 17、(6分)我们周围的物质世界是由100多种元素组成,为了便于研究元素的性质,常常需要寻找它们之间的内在规律.下表列出的是1-18号元素的部分最高正化合价和最低负化合价.请阅读并回答下列问题: (1)11号元素属于( )元素(填"金属"或"非金属"),它在化学反应中形成的离子与( )(填元素符号)原子具有相同的核外电子排布. (2)16号元素的原子核外电子数为( )推测该元素最低负化合价为( )最高正化合价的氧化物的化学式为( ) (3)从化合价角度分析,我们可以发现一些规律.请写出其中的一个: 18、某厂废水中含有质量分数为4.9%的H 2SO 4,需要中和后才能排放.某兴趣小组同学经过讨论,提出了两种中和方案,所用试剂的价格如下 : (1)请从经济与产物角度说明选择氢氧化钙的理由: ① ② (2)有同学建议用氨水进行中和,可以回收一种化肥,其化学式为 .该废水还会引起的环境问题是( )(填标号) A.重金属污染 B.有毒物质污染 C.富营养化污染D.悬浮物污染 19、(5分)一包白色粉末,由CuSO 4、CaCO 3、Na 2SO 4、NaOH 中的两种或两种以上的物质混合组成.为探究其组成,进行如下实验: (1)取少量白色粉末,向其中加入足量的水,充分搅拌后过滤,得到白色沉淀和无色滤液,则原白色粉末中一定不含有 (2)取实验(1)滤出的白色沉淀,向其中加入足量的盐酸,沉淀全部溶解,并产生无色气体 则原白色粉末中一定含有 根据上述实验可推断:原白色粉末的组成有( )种可能 为进一步探究原白色粉末的组成,取实验(1)得到的滤液,向其中通入CO 2,产生白色沉淀,则可推断原白色粉末中一定还含有 20、(3分)高氯酸(HClO 4)是最强酸,现有一种不常见的氯的化合物叫做高氯酸氯,其分子中氯的质量分数为0.526,且每个分子中含有4个氧原子.(1)高氯酸氯的化学式为( ) (2)高氯酸氯在室温下即发生分解,形成Cl 2、O 2和另一种氯的氧化物.已知该反应的化学方程式中3种产物的化学计量数相同,写出该分解反应的化学方程式: 21、(6分)FentOn 法常用于处理含难降解有机物的工业废水.其原理是利用Fe2+和H 2O 2的反应产生降解污染物的活性成分,现运用该方法降解有机污染物p-CP,探究有关因素对降解反应速率的影响.实验探究:控制p-CP 的初始浓度相同,实验温度恒定在25℃或40℃(其余实验条件见下表),设计如下对比试验: (1)请完成以下实验设计表(表中不要留空格) (2)实验①、②表明温度升高,降解反应速率 实验发现,温度过高时,降解反应较难发生.请从FentOn 法所用试剂H 2O 2的角度分析原因: (3)实验③得出的结论是:pH 等于10时,
中学生英语即兴演讲比赛稿 中学生英语即兴演讲比赛稿篇1 Good morning, my name is jack, it is really a great honor to have this opportunity for a interview, i would like to answer whatever you may raise, and i hope i can make a good performance today, eventually enroll in this prestigious university in september. now i will introduce myself briefly,i am 21 years old,born in heilongjiang province ,northeast of china,and i am curruently a senior student at beijing XX uni.my major is packaging engineering.and i will receive my bachelor degree after my graduation in june.in the past 4 years,i spend most of my time on study,i have passed CET4/6 with a ease. and i have acquired basic knowledge of packaging and publishing both in theory and in practice. besides, i have attend several packaging exhibition hold in Beijing, this is our advantage study here, i have taken a tour to some big factory and company. through these i have a deeply understanding of domestic packaging industry. compared to developed countries such as us, unfortunately, although we have made extraordinary progress since 1978,our packaging industry are still underdeveloped, mess, unstable, the situation of employees in this field are awkard. but i have full confidence in a bright future if only our economy can keep the growth pace still. i guess you maybe interested in the reason itch to law, and what is my plan during graduate study life, i would like to tell you that pursue law is one of my lifelong goal,i like my major packaging and i wont give up,if i can pursue my master degree here i will combine law with my former education. i will work hard in thesefields ,patent ,trademark, copyright, on the base of my years study in department of p&p, my character? i cannot describe it well, but i know i am optimistic and confident. sometimes i prefer to stay alone, reading, listening to music, but i am not lonely, i like to chat with my
2018年全国中学生英语能力竞赛通知 导读 2018年第26届全国中学生英语能力竞赛（NEPCS）正在报名，NEPCS是高校自主招生普遍认可的赛事之一，初赛由各中学统一组织及报名，意向报名的考生可直接向所在中学咨询报名相关事宜。 参赛对象及人数 普通中学初、高中各年级学生。 报名时间 提倡“重在参与”的奥林匹克精神，坚持“自愿参加”的原则，以学校为单位组织报名工作。 各省报名截止时间不一，最晚到11月初，具体请直接咨询本校老师。 竞赛时间安排 竞赛分初赛、决赛和全国总决赛三个阶段。
初赛时间为2018年11月11日（星期日）上午9：00—11：00。笔试（含听力），满分150分，全国统一命题，统一时间由各校自行组织。 决赛时间为2017年12月10日（周日）上午9∶00—11∶00。笔试（含听力），满分150分，全国统一命题，在全国各地同时进行。 全国总决赛时间2019年7月(以正式通知为准) 命题范围 本次竞赛的命题按课标要求，以2018—2019学年度上学期学过的内容为主，兼顾以前学过的内容，参考现行各种教材，但不局限于某一特定教材。初赛各年级竞赛试题命题范围以各版本教材2018年11月11日前所学全部内容为准，决赛命题范围以各版本教材2018年12月9日前所学全部内容为准。 竞赛题型 本次竞赛将借鉴国内外英语测试新题型及测试方法，在保持竞赛题型相对稳定和连续的基础上有较大创新，并探索使用非选择性客观题型和限制性主观题型，以促进考试与评价改革，并为各类英语考试试题改革进行先期探索和实验。题型以非选择题为主，约占60%以上。各年级赛题将进一步加强英语“双基”的考查力度，完善初赛、决赛听力测试，继续加大语篇层次上的语言运用能力的考查，还将设计一些考查智力赛题，以考查学生的逻辑、推理、判断和认知等能力，并增加赛题的区分度。
2016全国初中物理竞赛复赛试题(含答案） 初中物理是义务教育的基础学科，一般从初二开始开设这门课程，教学时间为两年。一般也是中考的必考科目。随着新高考/新中考改革，学生的综合能力越来越重要，录取方式也越来越多，三位一体录取方式十分看重学生的课外奖项获取。万朋教育小编为初中生们整理了2016年全国初中物理竞赛试卷和答案，希望对您有所帮助。 第29届全国中学生物理竞赛复赛试卷 本卷共8题，满分160分。 一、（17分）设有一湖水足够深的咸水湖，湖面宽阔而平静，初始时将一体积很小的匀质正立方体物块在湖面上由静止开始释放，释放时物块的下底面和湖水表面恰好相接触。已知湖水密度为ρ；物块边长为b ，密度为'ρ，且ρρ<'。在只考虑物块受重力和液体浮力作用的情况下，求物块从初始位置出发往返一次所需的时间。 解： 由于湖面足够宽阔而物块体积很小，所以湖面的绝对高度在物块运动过程中始终保持不变，因此，可选湖面为坐标原点并以竖直向下方向为正方向 建立坐标系，以下简称x 系. 设物块下底面的坐标为x ，在物块未完全浸没入湖水时，其所受到的浮力为 2b f b x g ρ= ( x b ≤) (1) 式中 g 为重力加速度.物块的重力为 3 g f b g ρ'= (2) 设物块的加速度为a ，根据牛顿第二定律有
3 g b b a f f ρ'=- (3) 将(1)和(2)式代入(3)式得 g a x b b ρρρρ'?? =- - ?'? ? (4) 将x 系坐标原点向下移动/b ρρ' 而建立新坐标系，简称X 系. 新旧坐标的关 系为 X x b ρρ ' =- (5) 把(5)式代入(4)式得 g a X b ρρ=-' (6) (6)式表示物块的运动是简谐振动. 若0X =，则0a =，对应于物块的平衡位置. 由(5)式可知，当物块处于平衡位置时，物块下底面在x 系中的坐标为 0x b ρρ ' = (7) 物块运动方程在 X 系中可写为 ()()cos X t A t ω?=+ (8) 利用参考圆可将其振动速度表示为 ()()sin V t A t ωω?=-+ (9) 式中ω为振动的圆频率 'g b ρωρ= (10) 在(8)和(9)式中 A 和?分别是振幅和初相位，由初始条件决定. 在物块刚被释 放时，即0t =时刻有x =0，由(5)式得
2016年上海市初中学生化学竞赛（第二十八届天原杯）复赛试题 （总分120分，时间120分钟） 相对原子质量：H-1 Li-7 C-12 N-14 O-16 Fe-56 一、选择题（本题包括16个小题，共40分，每小题有1个或2个选项符合题意。若有两个答案的错1个不得分，漏选1个扣一半分数） 1、2015年10月，因发现抗疟疾药青蒿素而首获诺贝尔自然科学类奖的中国本土科学家是 A. B. C. D. 2、化学用语书写正确的是 A、金钢石 B、汞蒸汽 C、氯化氨 D、瓷坩埚 3、已知HClO与H2SO3都是弱酸，两者可以发生反应：HClO + H2SO3→ HCl + H2SO4，下列判断合理的是 A、该反应属于复分解反应 B、该反应中H2SO3作还原剂 C、该反应说明某些酸具有一定的碱性 D、反应后溶液pH>7 4、垃圾应分类收集，以下物质应放置于贴有“”标志垃圾筒内的是 A、废电池 B、旧报纸 C、空易拉罐 D、过期药品 5、在命名化学物质时，如果某元素的化合价不止一种，一般我们把其中比较稳定而且常见的化合价作为标准，化合价比它高的加上前缀“高”，化合价比它低的加上前缀“亚”，以此进行区分。据此，下列物质命名正确的是 A、BaMnO4：锰酸钡 B、Na2FeO4：铁酸钠 C、Hg2Cl2：氯化汞 D、CaHPO4：亚磷酸氢钙 6、波尔多液是一种含铜杀菌剂，制作波尔多液的主要原料除了水和硫酸铜外，还需 A、纯碱 B、烧碱 C、硫磺 D、生石灰 7、下列能制备氢气并能灌充小氢气球的实验装置是
A. B. C. D. 8、在设计探究实验时，往往保持所有条件均相同进行多次实验，其目的是 A、增加数据数量，便于总结数据变化规律 B、控制实验条件进行对比 C、消除试剂中所含杂质对实验结果的干扰 D、消除偶然的不确定因素带来的误差 9、已知酸碱中和反应放出的热量与消耗的酸、碱的物质的量成正比。将30mL某稀硫酸与30mL某氢氧化钠溶液混合，恰好完全反应，溶液温度升高△T1，保持两种溶液浓度不变，体积均改为90mL进行中和，溶液温度升高△T2，若不计热量损失，△T1与△T2的关系是 A、△T1=△T2 B、△T1=3△T2 C、3△T1=△T2 D、6△T1 =△T2 10、某溶液的溶质可能是K2SO4、KCl、Na2CO3、NaOH中的一种或几种，某同学取4份此溶液样品，分别进行如下实验： ①进行焰色测试，火焰呈黄色，透过蓝色钴玻璃可以看到火焰呈紫色 ②加入硝酸银，产生白色沉淀，再加入稀硝酸，沉淀部分溶解，产生气体 ③加入足量氯化钡溶液，产生白色沉淀，该沉淀部分溶于稀硝酸且放出气体 ④加入足量硝酸钡溶液，产生白色沉淀，过滤后向滤液中加入硝酸银溶液，产生白色沉淀该同学最终确定该溶液中仅存在K2SO4、KCl、Na2CO3三种溶质。请分析．该同学只需完成上述哪两个实验，即可得出此结论？ A、①② B、③④ C、②③ D、②④ 11、意大利化学家阿伏伽德罗在化学上的重大贡献是建立分子学说，他提出：同温同压下，相同体积的任何气体含有相同数目的分子。现有两个密闭容器，分别装有等质量的甲、乙两种气体，若两容器内气体的温度和压强均相同，且甲的密度大于乙的密度。下列说法正确的是
21世纪演讲比赛演讲稿 hello, ladies and gentlemen, my name is zhang xinyu. today, im going to talk about growing pains. different people have different pains from different places. we are now students, so i think we have pains mainly from studies. time files. two months ago, i came to a middle school student.but i have a pain. homework is my growing pain. in the secondary school, we have more subjects to study. and homework is more than primary school.so i could’t adapt to the secondary school’s homework. i don’t have other time to do any sports or read any books. however, i think all pains will fade away in the end. i believe that i can adapt the school life step by step. try my best. that’s all. thank you for your attention. zhang xinyu篇二：21世纪杯全国英语演讲大赛竞赛内容及评分标... “21世纪杯”全国英语演讲大赛云南赛区 暨东盟南亚国际文化交流大使选拔赛 《竞赛内容及评分标准》 （一）外语类演讲/讲故事比赛 小学组（低段1-3年级）初赛（笔试45分钟）、复赛（时间5分钟）、决赛（时间5分钟）【初赛】笔试：以中国、世界、东盟南亚、云南文化知识为主， 85%的考试内容选自《东南亚南亚文化交流大使》竞赛手册，由组委会命题。题型以看图选择、英汉连线、看图选词、看图填空为主，考试时间45分钟。 【复赛】自备题目演讲+评委提问（评委提问，一问针对选手自备题目，二问选自《东南亚南亚文化交流大使》竞赛手册）。 （1）自备题目演讲（3分钟）（2）评委提问（2分钟） 【决赛】自备题目演讲+看图说话+评委提问（评委提问，一问针对选手自备题目，二问选自《东南亚南亚文化交流大使》竞赛手册）。 （1）自备题目演讲（2分钟）（2）看图说话（2分钟）（3）评委提问（1分钟）小学组（高段4-6年级）初赛（笔试45分钟）、复赛（时间5分钟）、决赛（时间5分钟）【初赛】笔试：以中国、世界、东盟南亚、云南文化知识为主， 85%的考试内容选自《东南亚南亚文化交流大使》竞赛手册，由组委会命题。题型以看图填空、选择、判断为主，考试时间45分钟。 1 / 7 【复赛】自备题目演讲+评委提问（评委提问，一问针对选手自备题目，二问选自《东南亚南亚文化交流大使》竞赛手册）。 （1）自备题目演讲（3分钟）（2）评委提问（2分钟） 【决赛】自备题目演讲+即兴演讲+评委提问（评委提问，一问针对选手自备题目，二问选自《东南亚南亚文化交流大使》竞赛手册）。 （1）自备题目演讲（2分钟）（2）即兴演讲（2分钟）（3）评委提问（1分钟）初中组、高中组初赛（笔试45分钟）、复赛（时间5分钟）、决赛（时间5分钟）【初赛】笔试：以中国、世界、东盟南亚、云南文化知识为主， 85%的考试内容选自《东南亚南亚文化交流大使》竞赛手册，由组委会命题。初中组题型以选择、判断、填空、阅读理解为主，高中组题型以选择、判断、翻译、阅读理解、简答为主，考试时间45分钟。 【复赛】自备题目演讲+评委提问（评委提问，一问针对选手自备题目，二问选自《东南亚南亚文化交流大使》竞赛手册）。
2016年全国中学生英语能力竞赛（NEPCS）决赛 高三年级组试题 （总分：150分答题时间：120分钟） 听力部分（共三大题，计30分） ⅠSentences （句子听写）（共5小题；每小题1分，计5分） Please listen to the following five sentences. There are several missing words in each sentence. Fill in the blanks with the exact words you hear. Each sentence will be read twice.（请听下面五个句子，每个句子中均有几个缺失的单词，请根据你所听到的单词填空。每个句子读两遍。）（答案写在答题纸上） 1. Is there else you can do to your plan? 2. I’ll go to the camera shop after I’ve the car. 3. She her job and chose to live in France. 4. What are the causes to the death of many wild ? 5. I don’t know how she looking after her family in such a difficult situation. ⅡDialogues （对话理解）（共10小题；每小题1分，计10分） (A) Please listen to the following five mini-dialogues. Each dialogue is followed by a question. Choose the best answer to each question according to the dialogue you hear. Each dialogue and question will be read twice.（请听下面五组小对话，每组对话后有一个问题，根据你所听到的对话内容，选出能回答所提问题的最佳选项。每组对话和问题读两遍。）（答案涂在答题纸上） 6. 7. 8. A. In her room. B. In her bag. C. In the kitchen. D. In her jacket. 9. A. Do the homework in his room. B. Watch his favorite TV program. C. Help the woman get the dinner ready. D. Record the film which he likes best.
2017-2018 年上海市初中学生化学竞赛（第二十九届天原杯） 复赛试题 （总分 120 分，时间 120 分钟） 相对原子质量：H-1 C-12 N-14 O-16 Na-23 Mg-24 P-31 S- 32 Cl-35.5 K-39 Ca-40 Cu-64 Zn-65 一、选择题（本题包括 16 个小题，共 42 分，每小题有 1 个或 2 个选项符合题意，若有两个答案的错 1 个不得分，漏选 1 个扣一半分数） 1．古诗词是中华民族的文化瑰宝，下列古诗词中对划线对象变化的描述属于化学变化的是 A.一味黑时犹有骨，十分红处便成灰。（[清] 徐宗干《咏炭》） B.河上姹女（水银），灵而最神，得火则飞，不见埃尘。（[汉] 魏伯阳 《参同契》） C.臣心一片磁针石，不指南方不肯休。（[宋] 文天祥《扬子江》） D.落红（落花）不是无情物，化作春泥更护花。（[清] 龚自珍《己亥杂 诗》） 2．中药的煎制直接关系到其疗效。下列制备中草药汤剂的步骤中，与过滤操作类似的是 A. 浸泡 B. 煎制 C. 滗汤 D. 灌装 3．2017 年 1 月 26 日美国《科学》杂志报道，哈佛大学实验室对 液氢样本施加 4.95×10 11Pa 压力，成功制造出了金属氢，这是一 种以氢原子为基本单位构成的晶体。关于金属氢的推测错误的是 A. 与氢气互为同素异形体 B. 制造金属氢过程属于化学变化 C. 可能具有良好的导电性 D. 摩尔质量与氢气相同 4．“酸雨”成为当今主要的环境问题之一，雨水在未被污染的大气中原本应该呈 A. 弱酸性 B. 中性 C. 弱碱性 D. 强酸性 5．下列实验操作中，与其他三项的目的不属于同一类的是 A.点燃甲烷、一氧化碳等可燃性气体前，先检验气体的纯度 B.做中和反应实验时，先在碱溶液中滴入 1-2 滴酚酞试液 C.在进行铁丝燃烧实验前，先向充满氧气的集气瓶中加入一层细砂
中学生即兴英语演讲比赛稿 中学生即兴英语演讲比赛稿 2020-10-06 英语即兴演讲是学生在没有做任何准备或者准备时间极短的情况下进行的演讲，其需要演讲人具有较快的思维能力和较强的组织能力的一种口头表达能力极强的交际活动。下面是范文大全小编为大家整理了中学生即兴英语演讲比赛稿3篇，欢迎大家阅读。 中学生即兴英语演讲比赛稿篇1 Whatever one does, one should do it with confidence. If one has no confidence, there is little possibility that one would ever achieve anything, especially when oneis faced with drawbacks or hardships. This truth seems to be evident. However, in reality we do see a lot of people who complain that they like the ability to do something or that their difficulties are too great to be overcome. For someone, this might be true. But for many others, this only shows that they have lost heart. Why do people often feel frustrated even though they are capable of doing something? There are, among others, two main reasons. First, these people do have a correct estimate of themselves. Second, they overestimate the difficulties. It is possible to build up faith in oneself by having the right attitude towards one s abilities. We should never underestimate one s abilities. But believe in the proverb: Where there is a will, there is a way. Confidence is the promise for fulfilling a task successfully.
第届全国中学生物理竞赛复赛理论考试试题及 答案 Document serial number【KK89K-LLS98YT-SS8CB-SSUT-SST108】
第32届全国中学生物理竞赛复赛理论考试试题 2015年9月19日 说明：所有解答必须写在答题纸上，写在试题纸上无效。 一、（15分）在太阳内部存在两个主要的核聚变反应过程：碳循环和质子-质子循环；其中碳循环是贝蒂在1938年提出的，碳循环反应过程如图所示。图中p 、+e 和e ν分别表示质子、正电子和电子型中微子；粗箭头表示循环反应进行的先后次序。当从循环图顶端开始，质子p 与12C 核发生反应生成13N 核，反应按粗箭头所示的次序进行，直到完成一个循环后，重新开始下一个循环。已知+e 、p 和He 核的质量分别为 MeV/c 2、 u 和 u （1u≈ MeV/c 2），电子型中微子e ν的质量可以忽略。 （1）写出图中X 和Y 代表的核素； （2）写出一个碳循环所有的核反应方程式； （3）计算完成一个碳循环过程释放的核能。 二、（15分）如图，在光滑水平桌面上有一长为L 的轻杆，轻杆两端各固定一质量均为M 的小球A 和B 。开始时细杆静止；有一质量为m 的小球C 以垂直于杆的速度0v 运动，与A 球碰撞。将小球和细杆视为一个系统。 （1）求碰后系统的动能（用已知条件和球C 碰后的速度表出）； （2）若碰后系统动能恰好达到极小值，求此时球C 的速度和系统的动能。 三、（20分）如图，一质量分布均匀、半径为r 的刚性薄圆环落到粗糙的水平地面前的瞬间，圆环质心速度v 0与竖直方向成θ（π3π 2 2 θ<< ）角，并同时以角速度0ω（0ω的正方向如图中箭头所示）绕通过其质心O 、且垂直环面的轴转动。已知圆环仅在其所在的竖直平面内运动，在弹起前刚好与地面无相对滑动，圆环与地面碰撞的恢复系数为k ，重力加速度大小为g 。忽略空气阻力。 （1）求圆环与地面碰后圆环质心的速度和圆环转动的角速度； （2）求使圆环在与地面碰后能竖直弹起的条件和在此条件下圆环能上升的最大高度； （3）若让θ角可变，求圆环第二次落地点到首次落地点之间的水平距离s 随θ变化的函数关系式、s 的最大值以及s 取最大值时r 、0v 和0ω应满足的条件。 四、（25分）如图，飞机在距水平地面（xz 平面）等高的航线KA （沿x 正方向）上，以大小为v （v 远小于真空中的光速c ）的速度匀速飞行；机载雷达天线持续向航线正右侧地面上的被测固定目标P 点（其x 坐标为P x ）发射扇形无线电波束（扇形的角平分线与航线垂直），波束平面与水平地面交于线段BC （BC 随着飞机移动，且在测量时应覆盖被测目标P