I often make kites on weekends用now改写答案解析

任务型阅读 (10)
Every year people celebrate the Spring Festival in China. It is usually in January or February. It’s the most important festival in China. So before it comes, everyone buys many things. And they often make a special kind of food called dumplings. It means(意思是) ‘come together’. Parents always buy new clothes for their children and children also buy presents for their parents.
On the Spring Festival Eve (除夕), all the family members come back home to have a big dinner. When they enjoy the meal, they give the best wishes to each other for the coming year. After dinner, all the family stay up until midnight to welcome the New Year. They sing, dance and play cards.
On the first day of the new year, people put on new clothes and visit their friends. They say ‘Happy New Year!’ to each other. They all have a good time during the festival.
1. When is the Spring Festival in China every year?
                                              
2. What do people do before the Spring Festival comes?
                                              
3. What do ‘dumplings’ mean?
                                              
4. What do children get from their parents ?
                                              
5. Do people have fun at the Spring Festival?
                                             

阅读下面短文，根据所给语境，按要求完成下列各题。
Mozart was born on January 27, 1756 and died on December 5 , 1791. When he was three, he often had lessons with his elder sister. （1）His father took him through many different countries, where he played music for lots of people.
But some people didn’t believe a little boy could write such beautiful music. They asked him to stay in a room all by himself for a week and somebody watched the room all the time .（2） In a week , he finished a new piece of music . After that, people believed that he could write beautiful music.
Mozart died when he was still a young man. During his short life he studied music and taught music and played music and wrote music. Even by working so hard, he couldn’t make much money . Often he had to borrow money from his friends. But his music made him happy and for more than two hundred years his music has made other people happy, too.
【小题1】将（1）处翻译成汉语。
___________________________________________________________________________
【小题2】对（2）处黑体部分提问。
___________________________________________________________________________
【小题3】根据短文内容，完成下面的句子。（每空一词）
Mozart was a __________ talent（天才）,but he still lived a ________ life.

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。选项中有一项为多余选项。
A.　Goods for auction (拍卖) sales
　　B.　Definition of bidding
　　C.　Way to sell more goods by auction
　　D.　Auction sales in history
　　E.　Brief introduction to auctions
　　F.　Making a larger profit as an auctioneer
【小题1】______
Auctions are public sales of goods, conducted by an officially approved auctioneer. He asks the crowd assembled in the auction-room to make offers, or “bids”, for the various items on sale. He encourages buyers to bid higher figures, and finally names the highest bidder as the buyer of the goods. This is called “knocking down” the goods, for the bidding ends when the auctioneer strikes a small hammer on a table at which he stands.
【小题2】 ______
The ancient Roman probably invented sales by auction, and the English word comes from the Latin auction, meaning “increasing”. The Romans usually sold in this way the goods taken in war. In England in the eighteenth centuries, goods were often sold “by the candle”: a short candle was lit by the auctioneer, and bids could be made while it stayed alight.
【小题3】 ______
Practically all goods whose qualities vary are sold by auction. Among these are coffee, skins, wool, tea, furs, silk and wines. Auction sales are also usual for land and property, furniture, pictures, rare books, old china and similar works of art.
【小题4】 ______
An auction is usually advertised beforehand with full particulars of the articles to be sold and where and when they can be viewed by potential buyers. If the advertisement cannot give full details, catalogues are printed, and each group of goods to be sold together, called a “lot”, is usually given a number. The auctioneer need not begin with Lot 1 and continue in the order of numbers: he may wait until he notices the fact that certain buyers are in the room and then produce the lots they are likely to be interested in.
【小题5】 ______
The auctioneer’s services are paid for in the form of a percentage of the price the goods are sold for. The auctioneer therefore has a direct interest in pushing up the bidding as high as possible. He will not waste time by starting the bidding too low. He will also play on the opponents among his buyers and succeed in getting a high price by encouraging two business competitors to bid against each other.

The Internet has become part of teenage life. There’s a report on 3,375 students aged from 10 to 18 in seven Chinese cities. It says that 38% of them believe they use the Internet often. While most of them get useful information and use the Internet to help in their studies, some are not using it in a good way. Many are playing online games too much. A few even visit Web sites they should not look at. Bad things can happen if young people spend too much time on the Internet.
In order to help young people use the Internet in a good way, a textbook on good Internet behavior has started to be used in some Shanghai middle schools this term. It uses real examples to teach students all about good ways of using the Internet. Some students also make online friends. But if you are meeting a friend offline, let your parents know.
Teachers and parents all think the book is a very good idea. It will teach students how to be a good person in the online world. It will be a guide for teens using the Internet and keep students away from bad sites.
【小题1】The underlined word “it” means_____?
A. the book  B. the report  C. the Internet
【小题2】From the report, about____ students between 10—18 years old  
in the seven cities use the Internet often.
A. 3,375   B. 1,280   C. 2,100   
【小题3】 What do most of the students do on the Internet?
A. They get useful information to help in their studies.
B. They play online games.
C. They make online friends.
【小题4】Why do teachers and parents think the book is a good idea?
A. Because it helps with the students’studies.
B. Because it is used in Shanghai middle schools.
C. Because it teaches students how to use the Internet in a good 
way.
【小题5】Which is  the best title for the passage?
A. The Internet is very useful.
B. Students can't use the Internet.   
C. Be careful when using the Internet.

Now you’ve finished three years of English study. There’s one way to demonstrate(展示)what you’ve learned-take a test!
Do you have any special methods(方法) you use to help you do better on a test? How well you do is often a matter of how well prepared you are. Here are some ways to make sure you’re at your best on test days.
Go to bed early. The night before a test is not the time to stay up watching TV. You want to be rested and wide-awake for test day.
Have a good breakfast. Test day isn’t a morning for donuts(面包圈).Nor is it a time to starve yourself. Eat plenty of low-sugar, high-energy food to keep your brain and body working their best.
Be prepared, Make sure you have two pencils and anything else you were asked to bring.
Watch the numbers. Make sure that the number of the items(项目)on your answer sheet matches the number of the question.
Look over all the answer choices(选择). Don’t assume(假定)that choice A is correct until you’ve checked the others. You may find a better one. And it is wrong to eliminate(排除)any choice that you can see at once. You’ll have a better chance of finding the right answer.
Check the clock. Make sure you allow yourself enough time to answer every question and go back and check your answers .Don’t spend too much time on any difficult question .Skip(跳读)it and come back to it later.
Keep up with your school work all year long That’s how you get the skills you need for taking tests.
四、填写表格，每空一词（10分）

How to make sure that you can do     1 on test days
2	Things you do
Going to bed early	Not 3  up or being asleep for test day
Having a good breakfast	Eating  4   low-sugar, high-energy food
Being prepared	Remembering to  5  two pencils and the    6 things you were asked to bring
Watching the numbers	The number of your answer should   7  the number of the question
Looking over all the choices	Don’t assume that the choice A is correct   8     you’ve checked the others
Checking the clock	9  your time carefully and not spending too much on any difficult question
You will get the skills you need    10   you keep up with your schoolwork all year long

 

Welcome to Chatsworth
Opening Time
House 11:00 a.m. Last admission (允许进入) 4:30, closes 5:30 p.m. Last entry to Scots Rooms, when open, is 4:00 p.m.
Garden 11:00 a.m. Last admission 5:00, closes 6:00 p.m.
June, July and August Garden opens at 10:30 a.m.
Admission
Adults ………………………………………………………………………£ 6.50
Senior citizens & students ………………………………………………… £ 5.25
Children …………………………………………………………………… £ 3.00
Childrenunderthree …………………………………………………………Free
Family Ticket …………………………………………………………… …£ 16.75
Car Park …………………………………………………………………… £ 1.00
Shopping
Two gift shops, with many times based on designs from the House and Garden.
Christmas shopping available at weekends from November to Christmas
Eating
Restaurant serving home made food. Bar serving drinks and cakes.
Special Events in 2003
Angling Fair weekend
8th and 9th May. One of the only fairs in the Country for game and sea fishing funs.
Flower and garden Show Weekend
26th and 27th June. The second year of this event, with flower shows and sales and gardening advice.
Guided Tours
Guided tours for children and students in English and French at an extra charge. Further details from the Booking office after 10:30 a.m.
63. When is the opening time, during summer?
A. 11:00 a.m.        B. 4:30 p.m.   C. 10:30 a.m.        D. 10:30 p.m.
64. An old person above 60 will pay ______ less than an adult.
A. £1.25         B. £ 2.25          C. £ 5.25         D. £ 6.50
65. How much is a guided tour for children?
A. It’s free     B. £10        C. I don’t know    D. £3
66. What are on sale on 26th and 27th June?
A. Fishes         B. Gardens        C. Fairs          D. Flowers
67. If you want to visit Scots Rooms, when will you get there?
A. At 10:00 a.m.    B. At 5:00 p.m.      C. Before 4:00 p.m.   D. After 6:00 p.m.

A young woman carrying a three-year-old child got on a bus. The conductor hurried to give her a warm welcome and then kindly asked the other passengers to make more room for the woman and her child. On seeing this, people began to talk. "You know this conductor used to be very rude. Now suddenly he has changed his bad behavior, "said a middle-aged man.
"Yes, he should be praised and we must write a letter to the company," said a second passenger. "That's right," another lady said, "I wish a newspaper reporter were here so that more people could learn from this conductor.”
Just then a gentleman who looked like a teacher turned to the conductor and said, "Excuse me, but can I know your name, please? Your excellent service must be praised..."
Before he could open his mouth, the three-year-old child sitting on the young woman's lap interrupted, "I know his name. I call him Dad."
【小题1】
One passenger suggested writing a letter to the company to ______  .

A．make a demand for more buses	B． thank the conductor for his good service
C．criticize the conductor for his rude behavior
D．invite a newspaper reporter to write about the conductor

【小题2】
What was the gentleman?

A．A teacher.	B．A newspaper reporter.
C．Not known from the story.	D．The conductor's friend from his company.

【小题3】
. The word "he" in the last paragraph refers to _______.

A．the gentleman	B．the conductor
C．the middle-aged man	D．the three-year-old child

【小题4】
It is clear from the story that the conductor _______.

A．has changed his attitude towards his work

B．has now been kind and polite to all passengers

C．has not changed his rude behavior to passengers

D．has now been kind and polite to women with children

US college students are burdened, with credit card (信用卡)debt, according to a study published Tuesday, and the problem can be serious－ranging from more drop-outs, to future employment problems and even self-murder. The study, by Georgetown University sociologist (社会学家) Robert Manning, blamed credit card issuers for actively targeting students and colleges for allowing them to do so. "The unrestricted selling of credit cards in universities or colleges is so aggressive that it now forms a greater threat than alcohol or sexual diseases," Manning told a news conference in Washington. "If we do not quickly deal with this serious problem, the matter will continue to get worse, with social consequences far more tragic (悲剧的) than mere dollars and cents. "
Based on hundreds of face-to-face interviews and surveys with students, Manning concluded both the number with credit card debt and their indebtedness had been "underreported" in previous studies－which failed to reflect the "survival strategies" many used to deal with their debts. These included the use of federal student loans to pay off credit cards, effectively shifting the debt, appealing to parents for loans, reducing course work hours to increase time at paid jobs, or even dropping out altogether to work full time.
"Official drop-out rates include growing numbers of students who are unable to cope with the stress of their debts and / or part time jobs for servicing their credit cards, " the study said. "Students credit card debts are examined during the employment process and may be an important factor in evaluating future employees," it noted. O’Donnell and Manning agreed students should bear some responsibility for reckless use of credit, but said credit card companies also had to be held responsible for making it so easy for them to get into debt. Manning said one of the most troublesome aspects of the student credit card issue was "the seduction (诱惑) of college and university officials by the credit card industry".
【小题1】Sociologist Robert Manning's study shows that     .

A．the number of American college students using credit cards on campus is increasing

B．more and more American college students meet with credit card debt problems

C．more and more American colleges encourage students to use credit cards to make profits

D．credit card issuers will run into debt for encouraging college students to use credit cards

【小题2】The author's feeling towards college students with credit card debts is __.

A．discouraged and negative	B．pitiful and critical
C．indifferent and disapproving	D．negative and doubtful

【小题3】The author implies all of following should be responsible for this problem EXCEPT      .

A．credit card issuers	B．college authorities
C．parents of the students	D．students themselves

【小题4】The word "reckless" in Paragraph 3 can be replaced by        .

A．inconsiderate

B．frequent

C．careful

D．regular

Dear Benter,
　　You have been away exactly two weeks today but it seems more like two years to me!
　　I’m glad to hear you’ll be back soon. Are you coming directly home, dear? Or do you plan to make some stops   36  the way? I hope you’ll be home in  37 for Patsy’s birthday next Sunday. She is  38 you to show films to her  39 friends.
Patsy keeps asking every day  40 you’ll be back. She says you never  41  that story you were telling her about  42 train that lost its “ toot”(喇叭嘟嘟声). You’d better   43  and think up a good ending  44 it. You know how Patsy is? She  45 be happy until she knows exactly what ­__46  to the “toot” and  47 the little train got it back  48 !
　　Everything at home is fine except that we  49 you so much! I’ve been  50 with the spring cleaning. Yesterday I had Cora  51 in to wash the kitchen walls and she did a very good __52 of it. The kitchen looks as though it’s been repainted. I made some new yellow curtains, and they  53 very beautiful.
　 I went to see your mother yesterday. Her  54 is all gone and she looks very  55 . Your sister Jean looks wonderful! She has taken off about fifteen pounds since she began dieting. But now she’s complaining that none of her clothes fit!
Hope to see you before next Sunday.
　 Love and kisses to you!
　　　　　　　　　　　　　　　　　     Yours
　　　　　　　　　　　　　　　　　           Lynn
【小题1】A in           B. on          C. at          D. along

【小题2】

A．time B．fact C．all D．the end

【小题3】

A．expecting B．thinking C．agreeing D．hoping

【小题4】

A．small B．short C．little D．low

【小题5】

A．that B．when C．why D．unless

【小题6】

A．finished B．stopped C．supplied D．included

【小题7】

A．some B．a C．the D．this

【小题8】

A．care B．arrive C．pretend D．hurry

【小题9】

A．on B．for C．at D．in

【小题10】

A．mustn’t B．couldn’t C．won’t D．shouldn’t

【小题11】

A．affected B．about C．happened D．was

【小题12】

A．how B．however C．because D．why

【小题13】

A．yet B．too C．again D．next

【小题14】

A．love B．think C．miss D．care

【小题15】

A．working B．ready C．together D．busy

【小题16】

A．stay B．come C．visit D．drop

【小题17】

A．work B．job C．thing D．clean

【小题18】

A．show B．feel C．become D．look

【小题19】

A．cold B．heat C．health D．medicine

【小题20】

A．good B．well C．nice D．best

This is a picture .There is a lake (湖)in the middle of the picture .On the lake we can see a boat .In the boat, there is a boy and his father .The boy is fishing .His father is looking at him .We can see some fish swimming in the lake .On the right of the picture , we can see a big tree .A young woman is reading a book .Her name is Mary .We can see very nice flowers near her seat .A little yellow dog is beside her feet .There are some birds in the sky .On the other side of the lake ,we can see three children .They are laughing and flying kites .They are having fun.
【小题1】This is a picture of _____.

A．A park

B．Mary’s family

C．a school

D．a restaurant

【小题2】Mary is ______.

A．looking at her son

B．reading a book

C．swimming in the lake

D．flying a kite

【小题3】The little dog is ____.

A．blue

B．yellow

C．black

D．brown

【小题4】There are _____people in the picture .

A．2

B．4

C．6

D．8

【小题5】Are they having a great time ?

A．No, they haven’t .

B．No, they aren’t .

C．Yes , they have .

D．Yes , they are .

阅读下面一则新闻，然后按要求写一篇１５０词左右的英语短文。
The headmaster of a middle school in southern England, David Hayes, has suspended（停课）students at his school 478 times over the past year—one in twenty of all the student suspensions in England.
Although some people believe that his actions go too far, he seems to be getting results. The number of students receiving “A” grades in the national senior school exam has increased from 48% in 2004 to 74% this year.
Mr Hayes says that many schools could achieves similar improvements if they improve their school students’ behavior. He also says the British government is wrong for pressuring schools not to suspend troublesome students and points out the harmful effects such students have on the quality of teaching and student learning. Suspensions often get many naughty students to improve their behavior, he says.
The school was below average in 2003. Mr Hayes joined the following year and now suspends two of the school’s 1880 students on average each school day. The total of 478 suspensions over the year means that almost one in four students have been punished this way. This year the school’s academic performance was judged as excellent.
【写作内容】
你在某英文报刊看到这则新闻后，准备就学生违纪的处理方式写一篇简评给该报编辑部，题目是“Should Schools Suspend Troublesome Students?”。内容要点包括：
1. 以约30词简要概括新闻内容：
2. 然后以约120词谈谈你的观点，内容包括：
（1）你是否支持该校长的做法，并陈述理由；
(2 ) 假设你是学校校长，谈谈你将如何处理违纪学生，并陈述理由。
【写作要求】
1. 可以使用实例或其他论述方法支持你的论点，也可参照阅读材料的内容，但不得直接引用原文的句子；
2. 作文中不能出现真实姓名和学校名称；
【评分标准】
概括准确，语言规范，内容合适，篇章连贯。

Mr. Flower was well-known around for growing the best flowers of the year and his four glass-houses were taken good care of. These glass-houses were close to a public path, which was always used ___36__ children and young people walking to and from __37__. Boys of about thirteen years of age, especially, were often tempted（尝试） to throw a stone or two at one of Mr. Flower’s __38__ . They managed to resist the temptation(抵制诱惑) when Mr. Flower was around, but the temptation often seemed to be too __39__ when Mr. Flower was __40__ to be seen. For this reason, Mr. Flower did his best to be __41__ his glass-houses at the beginning and end of the school days.
However, it was not always possible for him to be on guard at these times.  Mr. Flower had tried __42__ to prevent（阻止） the damage to his glass; but nothing that he had done had been__43__. He had been to the school to complain(抱怨) to the headmaster, but this had not done any__44__. He had hidden in the bushes（灌木丛） and __45__ those boys that threw stones __46__ his garden, but the boys could run __47__ faster than he, and they even __48__ at him at a distance（距离）. He had even walked along the path and picked up all those __49__that he could find so that the boys would have nothing to __50__, but they soon found others, or threw lumps of earth instead.
Then just as he had given __51__ hope of winning the battle（战斗）, a truly wonderful __52__ came up to him. He set up a large notice board made of good strong wood, some meters away from the glass-houses __53__ it could be clearly seen from the path. On the board he painted the __54__ : DO NOT THROW AT THIS NOTICE. After this, Mr. Flower had no __55__ .The boys were much more tempted to throw stones at the notice board than at the glass-houses.

【小题1】

A．to B．by C．of D．with

【小题2】

A．factory B．office C．school D．work

【小题3】

A．bed-rooms B．living-room C．reading-room D．glass-houses

【小题4】

A．strong B．weak C．limited D．strange

【小题5】

A．impossible B．unable C．possible D．somewhere

【小题6】

A．far away from B．in or close to C．into or out of D．at or out

【小题7】

A．in no way B．in a way C．in the way D．in many ways

【小题8】

A．successful B．cheerful C．wonderful D．careful

【小题9】

A．harm B．wrong C．good D．wonder

【小题10】

A．watched B．walked to C．waited for D．run after

【小题11】

A．towards B．over C．out of D．into

【小题12】

A．many B．much C．more D．lots of

【小题13】

A．laughed B．looked C．called D．surprised

【小题14】

A．earth B．sticks C．stones D．branches

【小题15】

A．pick up B．catch C．play with D．throw

【小题16】

A．in B．off C．out D．up

【小题17】

A．idea B．friend C．guest D．word

【小题18】

A．where B．there where C．on which D．there

【小题19】

A．announcement B．words C．sentences D．message

【小题20】

A．peaceful times B．further trouble C．more happiness D．questions

阅读下面一则新闻，然后按要求写一篇１５０词左右的英语短文。
The headmaster of a middle school in southern England, David Hayes, has suspended（停课）students at his school 478 times over the past year—one in twenty of all the student suspensions in England.
Although some people believe that his actions go too far, he seems to be getting results. The number of students receiving “A” grades in the national senior school exam has increased from 48% in 2004 to 74% this year.
Mr Hayes says that many schools could achieves similar improvements if they improve their school students’ behavior. He also says the British government is wrong for pressuring schools not to suspend troublesome students and points out the harmful effects such students have on the quality of teaching and student learning. Suspensions often get many naughty students to improve their behavior, he says.
The school was below average in 2003. Mr Hayes joined the following year and now suspends two of the school’s 1880 students on average each school day. The total of 478 suspensions over the year means that almost one in four students have been punished this way. This year the school’s academic performance was judged as excellent.
【写作内容】
你在某英文报刊看到这则新闻后，准备就学生违纪的处理方式写一篇简评给该报编辑部，题目是“Should Schools Suspend Troublesome Students?”。内容要点包括：
1. 以约30词简要概括新闻内容：
2. 然后以约120词谈谈你的观点，内容包括：
（1）你是否支持该校长的做法，并陈述理由；
(2 ) 假设你是学校校长，谈谈你将如何处理违纪学生，并陈述理由。
【写作要求】
1. 可以使用实例或其他论述方法支持你的论点，也可参照阅读材料的内容，但不得直接引用原文的句子；
2. 作文中不能出现真实姓名和学校名称；
【评分标准】
概括准确，语言规范，内容合适，篇章连贯。

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。
Want to be happier and healthier? Be nicer to yourself! According to a study recently reported on The New York Times, people who score high on tests of self-compassion(自怜) are less depressed, less anxious, and often more optimistic.【小题1】_____
“They believe self-criticism is what keeps then in line（符合常规的）. Most people have gotten it wrong because our culture says being hard on yourself is the way to be.” says Kristin Neff, a professor of human development at the University of Texas. In fact, it’s better to go easy on yourself. 【小题2】______
Try writing about a problem you have that you think is your weakness. 【小题3】 ______ Scared, sad, depressed, insecure or angry? Be as honest as possible.
Now think about an imaginary friend who is unconditionally accepting and kind. 【小题4】______What would this friend say to you about your weakness in this letter? As you write, try to fill your letter with a strong sense of his/her acceptance, kindness, caring, and desire for your health and happiness.
After writing the letter, put it down for a while.【小题5】____Really understand and agree with the words in the letter. That’s to say, accept your weakness. Actually, it’s not as bad as you think.

A．Write a letter to yourself from this person’s point of view.

B．Such as your physical appearance or a work or relationship problem.

C．And people who score low in these tests often treat themselves strictly and enjoy self-criticism.

D．Then come back and read it from your point of view.

E.Here are some tips you can follow to change your self-critical habits.
F.If you care about yourself, treat yourself really strictly.
G.Then write down how this weakness makes you feel inside.

阅读下面短文，根据所给语境，按要求完成下列各题。
Failure is what often happens. It is everywhere in our life. Students may fail in exams, scientists may fail in their research work, and players may fail in competitions. (A) Although failure happens to everyone, but different people’s attitudes(态度) towards failure are different.
Some people don’t think that their failure is an important thing at all. So they pay no attention to it. As a result, they will have the (B)      failure later. Some people think they themselves are fools and lose their hearts in everything after they get failure. Then they(C)      
their time and energy on useless things. At last, they may really be fools as they have thought.
（D）Other people are quite different from these two kinds of people mentioned above. Instead of being hopeless and lost, they draw a lesson from every failure and become more experienced. (E) they, after, will ,hard, in, work, be , the, successful , end. So we should draw a lesson from every failure and become more experienced.
【小题1】 (A)处句中有一处错误，请找出并改正。（可用文字叙述）
                                                                           
【小题2】在( B )、(C )处的横线上分别填上一个单词（B）        （C）           
【小题3】将(D)处句子译成汉语：                                              。
【小题4】 将(E)处的单词连成句子：                                           
                                                                           
【小题5】请从下面的选项中给短文选个标题，将答案标号填在此横线上：             

A．Draw a lesson from every failure	B．The attitudes towards failure
C．Failure is everywhere in our life	D．Failure is very important

已知：∠AOD=160°，OB、OC、OM、ON是∠AOD内的射线．
（1）如图1，若OM平分∠AOB，ON平分∠BOD．当OB绕点O在∠AOD内旋转时，求∠MON的大小；

（2）如图2，若∠BOC=20°，OM平分∠AOC，ON平分∠BOD．当∠BOC绕点O在∠AOD内旋转时求∠MON的大小；

（3）在（2）的条件下，若∠AOB=10°，当∠BOC在∠AOD内绕着点O以2°/秒的速度逆时针旋转t秒时，∠AOM：∠DON=2：3，求t的值．

如图，已知∠AOB=25°，把∠AOB绕顶点O按逆时针旋转55°到∠MON，点C、D分别是OB、OM上的点，分别作C点关于OA、ON的对称点E、F，连接DE、DF．
（1）求∠ECF的度数；
（2）说明DE=DF的理由．

如图所示，一根长a m的木棍（AB），斜靠在与地面（OM）垂直的墙（ON）上，设木棍的中点为P，若木棍A端沿墙下滑，且B端沿地面向右滑行．请判断木棍滑动的过程中，点P到点O的距离（用发生或不发生填空）变化；理由是：．