相關(guān)習(xí)題
 0  138360  138368  138374  138378  138384  138386  138390  138396  138398  138404  138410  138414  138416  138420  138426  138428  138434  138438  138440  138444  138446  138450  138452  138454  138455  138456  138458  138459  138460  138462  138464  138468  138470  138474  138476  138480  138486  138488  138494  138498  138500  138504  138510  138516  138518  138524  138528  138530  138536  138540  138546  138554  151629 

科目: 來(lái)源: 題型:閱讀理解

12.Eat like a king in the morning,a prince at noon,and a peasant at night.This saying is all about the importance of breakfast.And now scientists can tell us just why it's so important.According to a study carried out at Imperial College London,UK,skipping the first meal of the day not only means you eat more at lunch,but also that your brain wants to find more unhealthy foods.
The study suggests that there is a special part of our brain called the orbitofrontal cortex (眶額皮層),which plays an important part in making choices about what we eat.It is used for identifying the taste of food,especially when skipping breakfast.It is more likely to target high-calorie foods when you're on an empty stomach.
Scientists did an experiment on this.Dr Tony Goldstone from Imperial College London,scanned (掃描) the brains of 21 men and women,around the age of 25.On the first day,these people skipped breakfast before the scans.On the second day,they had cereal (谷物),bread and jam as breakfast.After the scan on both days,they had their lunch.
When the volunteers had skipped breakfast,they ate around 20 percent more at lunch,compared with days when they had eaten breakfast.?Their brain scans also showed the orbitofrontal cortex was especially responsive to high-calorie foods."We believe that bit identifies the value of foods-how pleasant,how delicious something is,"Goldstone told The Guardian.
36.From Paragraph 1,we learn thatA.
A.scientists found out why eating breakfast is important
B.it's easy to lose weight without breakfast
C.there's no need to have good food for supper
D.eating breakfast makes your brain smarter
37.Which of the following is NOT true about the orbitofrontal cortex?B
A.It is part of our brain.B.It tells people to eat breakfast.
C.It decides which food we like.D.It is active toward high-calorie food.
38.Which is the correct order for the experiment on the first day?C
①The volunteers skipped breakfast.
②The volunteers had lunch.
③The volunteers had a brain scan.
A.①②③B.③②①C.①③②D.③①②
39.In the experiment,the volunteers without breakfast ate about 20%Dat lunch.
A.of the usual breakfast                 B.more than the usual breakfast
C.of the usual lunch                       D.more than the usual lunch
40.Which of the following can be the title for this passage?A
A.Breakfast still most important         B.Three meals a day
C.Experiments on breakfast                 D.Experiments on lunch.

查看答案和解析>>

科目: 來(lái)源: 題型:閱讀理解

11.All work and no play makes Jack a dull boy.That saying holds true not only for you and me,but also for some of the most powerful and influential people in the world,such as the presidents of the United States.
But how do American presidents spend their vacation time?Let's take a look!
Franklin D.Roosevelt,considered one of the greatest presidents in American history,had limited vacation options because of his polio(小兒麻痹癥).He began visiting Warm Springs,Georgia in 1924 for its curative waters and later built a 2,000 acre polio treatment center nearby.He liked to cruise the Potomacon his yacht(游艇) and three times as president returned to his beloved Canadian island of Campobello,with which he fell in love as a kid.
Former President Bill Clinton,however,was never much good at vacationing.His staff had to practically force him to go on vacation his first year in office; his idea of relaxing was reading four good books simultaneously(同時(shí)) while enjoying a cigar (chewed,not smoked).He could also lose himself in a game of golf,where his somewhat flexible interpretation of the rules could at times drive his partners crazy.
Obama's predecessor(前任) also knows how to relax.Fishing is in the Bush family DNA:for blue sharks off the coast of Maine or anything with fins,almost anywhere else.George W.Bush also relaxed as president by jogging and clearing brush on his Texas ranch.Since leaving office,he has become an active mountain biker and,more recently,has taken up painting.
Obama tends to take a winter break in Hawaii,where he was born and raised,and a summer vacation in Martha's Vineyard,off the southern coast of Cape Cod,Massachusetts.In between,he plays basketball every couple of weeks and has been known to do some skeet shooting at Camp David.Obama's favorite pastime,no matter the location,has become easy to spot:golf.
71.What's the passage mainly about?A
A.US presidents on holiday
B.Relationship between work and play.
C.Famous US presidents
D.Suggestions on spending holidays.
72.What's the main reason for Franklin choose to spend his holidays in the spring or on his yacht?B
A.Personal interests
B.Physical disability.
C.Tidal current
D.Official arrangement.
73.What's special when Bill Clinton was playing golf?C
A.He could often be the top player
B.He could often be the bottom player.
C.He did not often respect the rules
D.He usually showed good team spirit.
74.From Paragraph 5,we may infer thatD.
A.the Bush family were mostly fishermen.
B.the Bush family like to fish only near Maine.
C.father of George W.Bush likes to work on farm.
D.father of George W.Bush also loves fishing.
75.In the last paragraph,many of Obama's hobbies are mentioned EXCEPTA.
A.sailing            B.playing basketball   C.shooting         D.golfing.

查看答案和解析>>

科目: 來(lái)源: 題型:閱讀理解

10.First lady Michelle Obama has some advice for some Tennessee High School graduates:Strike your own path in college and life and work to overcome inevitable difficulties with determination and courage.
The first lady told the 170 graduates that she spent too much of her own time in college focusing on academic achievements.While her success in college and law school led to a high-profile(備受矚目) job,she said,she ended up leaving to focus on public service.
"My message to all of you today is this:Do not waste a minute living someone else's dream,"she said."It takes a lot of real work to discover what brings you joy…and you won't find what you love simply by checking boxes or padding your GPA(成績(jī))."
She said the school reminded her of her own high school experience in Chicago."My No.1 goal was to go to a high school that would push me and challenge me,"she said."I wanted to go somewhere that would celebrate achievement.A place where academic success wouldn't make me a target of teasing or bullying,but instead would be a badge of honour."But Mrs.Obama said pitifully that not all students have the same opportunities."Unfortunately,schools like this don't exist for every kid,"she said."You are lucky."
The first lady told graduates that failure may be a part of their college lives and careers,and that how they respond to any difficulties will define them."That's when you find out what you're really made of in those hard times,"she said."But you only do that if you're willing to put yourself a position where you might fall."
Overcoming difficulties has been the hallmark(特征) of many great people,she said."There's this guy Barack Obama…h(huán)e lost his first race for Congress,and now he gets to call himself my husband."The first lady joked:"I could take up a whole afternoon talking about his failures."
66.Michelle went to Tennessee High School toD.
A.visit her old school                       B.help the votes for Obama
C.welcome new students                   D.give some advice for the graduates
67.By talking about her academic achievements,Michelle wanted toC.
A.show off her great success in college     
B.be the example for the students
C.warn that it's not enough to study well      
D.encourage the students to focus on study
68.According to Michelle's description,Tennessee High School is likely toD.
A.tease or bully students                   
B.receive black children only
C.promise students with GPA             
D.honour students with academic success
69.How could you find out what you really love according to Michelle?A
A.Put yourself in a difficult position and meet the challenge.
B.Try your best to be successful in academic performances.
C.Try everything you are interested in and make comparison.
D.Choose a target and insist on it regardless of failures.
70.Michelle mentioned Obama as an example ofB.
A.winning the vote                      
B.overcoming difficulties
C.being a top students                  
D.doing public service.

查看答案和解析>>

科目: 來(lái)源: 題型:閱讀理解

9.What parents owe their children?
I take the firm position that parents do not owe their children a college education.If they can afford it,they can certainly send them to the best universities.But they must not feel guilty if they can't If the children really want to go,they'll find away.There are plenty of loans and scholarships for the bright and eager ones who can't afford to pay.
When children grow up and want to get married  their parents do not owe them a down payment on a  house.They do not have the duty to baby-sit their grandchildren If they want to do it must be considered  a favor not an obligation.
Do parents owe their children anything?Yes,they owe them a great deal.
One of their obligation is to give their children a personal worth.A child who is constantly made to feel stupid and unworthy.constantly compared with brighter brothers,sisters,or cousins will become so unsure,so he/she is afraid of failing that he/she won't try at all.Of course they should be properly corrected  when they do wrong,but it's often better to let children learn their mistakes by themselves in time.All our parents should do is to trust them  respect them,tolerate them and give them chances to try and fail.They must learn to stand failure.When criticisms are really needed,they should be balanced with a smile and a
Kiss.That is the way children learn.
Parents owe their children a set of solid values to build their lives.This means teaching them to respect the rights and opinions of others; it means being respectful to elders,to teachers,and to the law The best way to teach such values is by deeds.A child who sees no laughter and no love at home will have difficulty in laughing and loving.
No child asks to be born.If you bring  a life into the world,you owe the child something.

50.According to the author,C.
A.parents must support their children even after they married
B.parents should give their children a down payment on a house
C.parents needn't feel guilty if they are unable to send their children to universities
D.if parents can't afford the tuition,they should take loans to send their children to go to colleges
51.The author mainly talks about in this passageA.
A.the duties of the parents
B.why parents owe their children something
C.the best way for parents to teach their children
D.the reason why children feel stupid and unworthy
52.According to the author,what should parents do when children make mistakes?C
A.Criticize and correct them immediately.
B.Compare them with brighter brothers or sisters.
C.Let'children learn their mistakes by themselves in time.
D.Tolerate them and tell their children not to mistakes again.

查看答案和解析>>

科目: 來(lái)源: 題型:閱讀理解

8.One Monday morning,Paul and his classmates were in science laboratory for their practical chemistry lesson.The students were going to work in pairs to do an experiment.Before they began,the teacher gave them this description of the different stages of the experiment.
Stage 1:Prepare the equipment:a test tube,a crucible,a Bunsen burner and tongs.
Stage 2:Weigh 5grams of baking soda (sodium bicarbonate) and put it in a crucible.
Stage 3:Heat 10ml of hydrochloric acid (鹽酸) in a test tube.
Stage 4:Pour the warm acid onto the baking soda and continue to heat the mixture.
Result:The acid reacts with the bicarbonate(碳酸氫鹽)to form water,carbon dioxide gas and salt.The hotter the mixture,the quicker the reaction.Continue to heat the mixture until the water evaporates,leaving the salt in the crucible.
Paul and his partner followed the instructions and set up their equipment.Paul went to the cupboard to get a bottle of hydrochloric acid.He found that there was only one bottle in the cupboard so he took that.There was no label on the bottle and Paul didn't check with the teacher if it was the right solution.
He measured the liquid and poured it into a test tube.Using tongs to hold the test tube,he heated it over the Bunsen burner.That's when things started to go wrong.The liquid in the test tube was not hydrochloric acid.When it was heated,it formed a thick cloud of white gas.Soon the room was full of this strong smelling white gas.
All the students started coughing and their eyes hurt.The teacher immediately opened the windows and ordered the students to leave the laboratory at once.She realized that the liquid was a crylamide (丙烯酰胺) and that it is poisonous.
Fortunately,nobody was injured in the incident.However,it taught the students and the teacher a good lesson.

43.What lesson did the incident teach the students and the teacher?A
A.Never have a bottle without a label in the chemistry lab!
B.Obey your teacher's instructions in the Chemistry lab.
C.Acrylamide can't take the place of hydrochloric acid.
D.Finding something unusual happened,you have to leave the laboratory at once.
44.What substance were the students making in the experiment?C
A.Water              B.Carbon dioxide gas         
C.Salt               D.Poisonous gas
45.Why did Paul make the mistake?D
A.He went to the cupboard to get the bottle by himself.
B.He found that there was only one bottle in the cupboard so he took that.
C.There was no label on the bottle.
D.Paul didn't check with the teacher that it was the right solution.
46.Why did the teacher send the students out of the classroom?C
A.Because the room was full of this strong smelling white gas.
B.Because all the students started coughing and their eyes hurt.
C.Because the liquid was a crylamide and that it is poisonous.
D.Because someone was injured in the incident.

查看答案和解析>>

科目: 來(lái)源: 題型:閱讀理解

7.People who show confidence really seem to have it made.They seize more rewarding careers,keep good relationships,and just seem to do everything with more styles than the rest of us.
So what is the secret?There isn't one.Self-confidence is a skill and habit that anyone can learn to develop.And although people who are raised in an encouraging environment with confident role models have a hard start in self-confidence development,we all can learn to become more confident at any age.
Try these simple tips for practising and increasing your self-confidence levels:
Dare to fail.Anybody who's out there bravely performing is going to fail repeatedly.If you are not failing,you are not trying.So don't take failure too hard or too personally.Just learn to deal with it and use its lessons to keep improving.
When in doubt,pretend you know what you are doing.Because,if you are confident of your abilities,by the time you have done it,you will be experienced.
Dress for success.You don't have to be beautiful to be confident.Make the most of your own unique physical characters and weaken your disadvantages.
Listen to yourself.You are the only person who knows what's right for you.Don't put others'opinions above your own inner voice.
Build a confident vocabulary.Stop putting yourself down and give up continually blaming your tiny weaknesses.Learn to show up your strong points and the world will learn to see and celebrate them with you.
Pass on the praise.Praise others for their virtues and strengths.This practice will not decrease your confidence,but help increase it.

39.The passage is written mainlyD.
A.to explain the definition of self-confidence
B.to explain the secret of self-confidence
C.to tell people how important self-confidence is
D.to tell people how to build self-confidence
40.The main idea of the sixth paragraph isC.
A.to be confident means to have no disadvantages
B.taking full advantage of your physical characters will help you be confident
C.your unique characters will help you be confident and be successful
D.to be confident means to be beautiful
41.All the following are tips to increase your self-confidence level EXCEPTC.
A.not to be afraid of failure             B.dress yourself properly
C.pretend to know everything              D.make your advantages more obvious
42.B will weaken your self-confidence.
A.Praising others for their strong points
B.Always following others'advice to do things
C.Giving up blaming your weaknesses
D.Believing in yourself.

查看答案和解析>>

科目: 來(lái)源: 題型:閱讀理解

6."Slow City"-a recently launched project focused on preserving the traditional quality of life enjoyed in some of Italy's smaller cities and towns.The project was born from the idea of the"Slow Food"movement-started in Italy in the 1980s-which promotes leisurely eating and the growing of local,healthy products to fight against the American fast-food style.
"The American urban model has invaded our cities,making Italian towns look the same.We want to stop this kind of globalization,"says Paolo Saturnini,an Italian mayor.
The"Slow City"project plans to emphasize the rich,cultural,culinary(廚房的) and artistic local traditions of each community.
Walking areas will be enlarged and squares and parks will be made greener with more plants.Car alarms and other noise that disturbs the peace will be banned,and ugly TV aerials(天線),advertising posters,and signs will be taken down.
City councils will also insist on the use of recycling and renewable energy sources,and will also introduce ecological transport systems.Parking will be made stress-free by creating more public parking areas,and easily accessible walkways and bike lanes will cross the city.But in the"Slow City"way,all improvements will probably come about slowly.
Thirty-two Italian city councils,which joined the"Slow City"program,have decided to take further steps in this direction by increasing the numbers of traditional family-style eating establishments,reducing noise pollution,and concentrating on making their towns friendlier for people to live in.
Organic local produce will be promoted in all restaurants and genetically modified foods(轉(zhuǎn)基因食品) will be banned."We can't stop large,fast-food chains from coming here,but we hope that people who come to our towns will not want to eat exactly the same hamburger they can eat in Melbourne,London or Paris,but want something genuine and different,"said Saturnini.
67.According to the passage,the"Slow City"project aims atD.
A.preventing Italy from being affected by America
B.beautifying the environment of small Italian cities and towns
C.calling on Italians to enjoy stress-free life
D.protecting the traditional Italian lifestyle
68.From Paragraphs 4-5,we can infer thatC.
A.cars in"Slow City"will have to go slowly
B.people can park their cars free of charge in"Slow City"
C."Slow City"will take on an environmentally friendly look
D.a(chǎn)dvertising in"Slow City"will be banned 
69.Further measures will be included in the"Slow City"program EXCEPTC.
A.cutting down noise pollution
B.stop genetically modified foods
C.getting more towns involved in the project
D.building more family-style restaurants
70.In Saturnini's opinion,when traveling in"Slow Cities",visitorsD.
A.a(chǎn)ren't provided with fast food
B.will see few fast-food chains
C.can enjoy themselves like in London
D.can enjoy real Italian-style healthy food.

查看答案和解析>>

科目: 來(lái)源: 題型:閱讀理解

5.A"talking kitchen"teaches students how to cook French food and speak French at the same time.Researchers at New Castle University in the United Kingdom have developed the French Digital Kitchen.Professor Paul Seed House and Patrick Olivier led the project.Professor House tells us that it works like a satellite navigation(導(dǎo)航) system in a car,which direct us how to get to your destination.
The kitchen equipment and tools use motion sensor(動(dòng)作傳感器) technology.The sensors help a computer guide the students through instructions in French.
This is how the system works.The system can tell whether you've done what you were asked to do or not.For example,the system tells you to take some butter and cut it with a knife.There's a sensor on the package containing the butter so it can tell where the butter's being moved.The sensor in the knife not only knows that the knife is moving,but it also knows what motion the knife is making.So it can know whether the knife is cutting or not.And it doesn't go on to the next step of the program unless you've done what it sense you've done.
Students can ask the computer to repeat the instructions or translate them into English.There are vocabulary lessons before and after the cooking.
Professor House says the French Digital Kitchen turns the process of learning language into a real-life experience."Here you're taking itout of the classroom and you're actually using the language to produce something that you can eat at the end of it.It's very enjoyable."
The system could be available for sale by the end of 2013.Adding the technology to a new kitchen could add about ten to twenty percent to the building costs.The researchers have also been given money to develop programs in six other languages,including English,Italian and Spanish.
56.The"talking kitchen"developed by New Castle University is mainly aimed atC.
A.helping students who love French food
B.helping house owners prepare their meals
C.helping learners who study French as a foreign language
D.helping housewives who want to learn cooking French food.
57.The third paragraph mainly tells usD.
A.what the system is                       
B.how the system was invented
C.what a motion sensor is                  
D.how the system works
58.What does the underlined word"it"(in Para.5)refer to?B
A.French food                              
B.The process of cooking and learning
C.The process of listening and translating         
D.French culture
59.What would be the best title for the passage?D
A.Learning While Eating                    
B.A Satellite Navigation System
C.A New Trend of Kitchen.
D.A"Talking Kitchen"
60.The passage is most probably aB.
A.newspaper ad                         
B.science news report
C.science fiction story                        
D.book review.

查看答案和解析>>

科目: 來(lái)源: 題型:閱讀理解

4.Learning the language of a country isn't enough.If you want to ensure a pleasant visit,find out as much as possible about the manners and customs of your hosts.
Sometimes good manners in one place are bad manners in other places.If you are a visitor in the land of Mongolia,some friends ask you to eat with them.What kind of manners do they want you to have?They want you to give a loud"burp"(打嗝) after you finish eating.Burping would show that you liked your food.But in some other countries,if you give a loud burp,you are told to say"Excuse me,please."
In many places,people like to eat together.But in some parts of Polynesia it is bad manners to be seen eating together.People show their good manners by turning their backs on others while they eat.
You will probably be surprised just how different they can be from your own.A visitor to India would do well to remember that people there consider it impolite to use the left hand for passing food at table.The left hand is supposed to be used for washing yourself.Also in India,you might see a man shaking his head at another to show that he doesn't agree.But in most parts of India,a shake of the head is a gesture that expresses agreement or acceptance.Nodding your head when you are offered a drink in Bulgaria is likely to leave you thirsty. In that country Bulgaria,you shake your head to mean"yes"-a nod means"no".
In Europe it is quite usual to cross your legs when you are sitting talking to someone,even at an important meeting.Doing this when you are meeting an important person in Thailand,however,could cause offence.It is considered too informal an attitude for such an occasion.Also try to avoid touching the head of an adult-it's just not done in Thailand.
Attitudes to women vary much around the world.In Japan,for example,it is quite usual for men to plan evening entertainments for themselves and leave their wives at home.
Knowing about customs and attitudes is useful when you are traveling,but you also need to know the language used to express different degrees of formality(禮節(jié)).
51.In Mongolia,if you give a loud burp after eating,your friends will be veryC.
A.surprised             B.sorry            C.happy               D.upset
52.Where do people eat back to back?A
A.In Polynesia          B.In Mongolia     C.In Japan             D.In India
53.From the passage,we know that shaking head means"yes"inD.
A.Thailand          B.Mongolia        C.Japan            D.Bulgaria
54.The underlined sentence"Nodding your head when you are offered a drink in Bulgaria is likely to leave you thirsty."MeansA.
A.you are probably not to be served a drink when you nod your head
B.you're possibly eager to have a drink if you nod your head
C.it's probable that you are thirsty if you nod your head
D.you'd like to have a cup of tea because you nod your head
55.According to the passage,which attitude to women is usual in Japan?B
A.Men always go to parties with women.
B.Men plan evening entertainments for themselves,while their wives stay at home.
C.Men and women have equal rights to go to parties.
D.Men plan evening entertainments for their wives.

查看答案和解析>>

科目: 來(lái)源: 題型:信息匹配

3.Li Hua has just come back from the US and intends to give some of his relatives mentioned in 61-65 some DVDs as gifts.He brings back six DVDs(A-F).After the description of each person,decide which DVD is the most suitable one for the people.There is one extra DVD,which you do not need to use.
A61.Li Hua's Grandfather is a fan of Jules Verne,the father of modern science fiction.He dreamed to be a hero and save people in trouble when he was young.Although he is old now,he will not miss a good science fiction movie.
B62.Li Hua's mother works in a primary school as an English teacher.She thought English learning should be interesting,and she often puts on some English movies in class,so students can not only learn the language but history and culture.Of course the language in the movie will not be difficult and it will be better if there is a beautiful English song in it.
D63.Li Hua's father is a history professor in a college.He is especially interested in the history of some foreign countries such as Egypt,Germany and the UK.Now he is preparing a lecture about the history of the UK and needs some materials.
E64.Li Hua's elder sister loves reading love stories ever since she was a middle school student.Now,she has just fallen in love with a good guy.They both love seeing good films,and now,of course,a film about love is their favorite.
C65.Li Hua's elder brother is a history lover under his father's influence.He was fond of movies about wars in history.He has seen many movies about people struggling in Japanese or Nazis'prisons,and he would like to see something different.
A.The League of Extraordinary Gentlemen
       A hunter,a scientist,a vampire,an invisible man,an immortal,a spy,a beast…When a masked madman known as"The Fantom(幽靈)"tries to control the world,great adventurer Allan Quatermain sets up a team of superheroes,the likes of which mankind has never seen.Now,despite fighting their own personal demons and each other,they must join forces to save the world.
B.The Prince of Egypt
This cartoon movie attracted audiences the world over with its fantastic artistry,timeless story and powerful music.This masterpiece became one of the top animated films of all time.The extraordinary tale of two brothers---one born of royal blood,one an orphan with a secret past---is brought to life as never before,with unforgettable characters voiced by many stars.One of the two brothers becomes the ruler of the most powerful empire on earth,the other the chosen leader of his people.What they do will forever change their lives---and the world.
C.As Far As My Feet Will Carry Me
       Based on the true story of Josef Martin Bauer's best-selling novel,this powerful movie tells us the unbelievable journey of German soldier Clemens Forell in his dramatic escape from a Siberian(西伯利亞的) labor camp after World War II.Through the bitter cold of winter,deserted landscapes,and life-threatening adventures,F(xiàn)orell who was determined to return to his family makes his way,step by step,day by day,towards Persia and freedom.14,000 and 3 endless years of uncertainty later,he is finally about to reach his destination.
D.Braveheart
       This Academy Award winning film,directed by Mel Gibson,tells the story of the great thirteenth century Scottish hero William Wallace,known to his countrymen as Braveheart.Gibson stars as Wallace,who leads the Scots to fight against the cruel English king Edward I after he suffers a personal tragedy at the hands of English soldiers.Willing to fight to the death for Scotland's freedom,Wallace and his companions,whose faith in freedom is stronger than any English army,fight bravely with their enemy.
E.The wedding Planner
       Mary Fiore is the wedding planner.She's ambitious,hard-working,extremely organized,and she knows exactly what to do and say to make any wedding a fantastic event.But when Mary falls in love with a handsome doctor,her life is turned upside down---he's the groom in the biggest wedding of her career!Will she help him marry his rich girlfriend,or will Mary finally get to be the bride herself?As this sweet romantic comedy proves,when it comes to love,you can never plan what's going to happen.
F.Agent Cody
       Frankie Muniz and Hilary Duff star in this"clever and lively action-adventure"(Los Angeles Times) about a junior CIA agent on a mission to save the world,stop the bad guys and win the girl's heart…Catching your eye with cool tools,exciting special effects and the wonderful skateboard chase,Agent Cody Banks delivers great fun for the entire family.

查看答案和解析>>

同步練習(xí)冊(cè)答案