相关习题
 0  86212  86220  86226  86230  86236  86238  86242  86248  86250  86256  86262  86266  86268  86272  86278  86280  86286  86290  86292  86296  86298  86302  86304  86306  86307  86308  86310  86311  86312  86314  86316  86320  86322  86326  86328  86332  86338  86340  86346  86350  86352  86356  86362  86368  86370  86376  86380  86382  86388  86392  86398  86406  151629 

科目: 来源:贵州省遵义四中2012届高三上学期第四次月考英语试题 题型:050

阅读理解

  Throughout our childhood our parents taught us to say "thank you" and it has become a habit-something we say automatically, along with "please".And because of this we have forgotten just how important gratitude is and how essential it is in leading fuelled(感到满足的)lives.

  Just for a minute, think of all the things you are grateful for, such as loving friends, good health, great holidays as well as everyday items such as a comfortable home, TV, and clean water.The list, in fact, could go on and on.

  Now focus on events that have made you resentful-it's raining, the car won't start, and a colleague irritates(使烦躁)you.You start to feel unhappy, and that is something that certainly does not make you feel good!

  It's a simple choice and we have the ability to choose how we feel.But for most of us, it just doesn't seem as easy as that-isn't the world out to get us? Well, no, it isn't actually, and it's just our perception(认识)of how things are.

  Let me give you an example:it's a rainy day, and immediately most people will start to complain, telling everyone who will listen what a miserable day it is, with the result that they end up feeling miserable themselves.But look at it another way and despite wet clothes and hair, both will dry perfectly well and no lasting harm has been done.And in addition to this, because of rain, we not only live in a green and beautiful landscape, we are also able to grow a lot of fruit and vegetables.

  There really is no obvious reason for feeling miserable-in fact there is a great deal to be grateful for.It's all to do with how we perceive things.

  Realize what a difference having gratitude can make to your life.That's why gratitude is so special-use it to feel good!

(1)

What do we usually do without thinking according to the author?

[  ]

A.

Focus on bad things.

B.

Prefer to feel good.

C.

Express thanks orally.

D.

Take many things for granted.

(2)

By the example in the fifth paragraph, the author advises us to _________.

[  ]

A.

see things in a different way

B.

accept the unchangeable things

C.

ignore the harm bad weather does

D.

listen to others' complaints patiently

(3)

By writing the passage, the author mainly wants to tell us _________.

[  ]

A.

to think twice before we act

B.

to be grateful for what we have

C.

it is no use making complaints

D.

saying "thank you" has many advantages

(4)

The tone of the author in this passage is _________.

[  ]

A.

humorous

B.

disapproving

C.

persuasive

D.

ironic

查看答案和解析>>

科目: 来源:贵州省遵义四中2012届高三上学期第四次月考英语试题 题型:050

阅读理解

  In some urban centers, workaholism is so common that people do not consider it unusual.They accept the lifestyle as normal.Government workers in Washington

  D#C, for example, frequently work sixty to seventy hours a week.They don't do this because they have to; they do it because they want to.

  Workaholicm can be a serious problem.Because true workaholics would rather work than do anything else, they probably don't know how to relax.

  Is workaholism always dangerous? Perhaps not.There are, certainly, people who work well under stress.Some studies show that many workaholics have great energy and interest in life.Their work is so pleasurable that they are actually very happy.For most workaholics, work and entertainment keep them busy and creative.

  Why do workaholics enjoy their jobs so much? There are several advantages to work.Of course, it provides people with paychecks, and this is important.But it offers more than financial security.It provides people with self confidence; they have a feeling of satisfaction when they're finishing a challenging piece of work and are able to say, “I made that.” Psychologists claim that work gives people an identity through participation in work, they get a sense of self and individualism.In addition, most jobs provide people with a socially acceptable way to meet others.Perhaps some people are compulsive about their work, but their addiction seems to be a safe--even an advantageous-one.

(1)

The passage indicates that workaholics _________.

[  ]

A.

just know work but nothing else

B.

are willing to work hard for long hours without pay

C.

find their work provide them more satisfaction and self confidence than how much they are paid

D.

has the work with more responsibility than others

(2)

One of the reasons that some people are not willing to quit their jobs even in their eighties and nineties is that _________.

[  ]

A.

they are in the need of financial security

B.

they would rather work than be disturbed by domestic affairs

C.

they long for a sense of identity and being accomplished

D.

they may have health problems from sheer boredom

(3)

This passage is mainly about _________.

[  ]

A.

workaholics are usually successful people, but their lives are in a mess

B.

workaholism can lead to serious problems but it can also create a joyful life

C.

people who are absorbed in their work may enjoy movies, sports and other kinds of entertainment

D.

those who work even under difficult conditions may be very happy

(4)

It can be inferred from the passage that

[  ]

A.

in the eyes of all the common people workaholics are peculiar

B.

to workaholics, work is the sole source of happiness

C.

a piece of challenging work may provide the workaholics a sense of satisfaction

D.

workaholics are as addicted to their job as other people are to drugs or alcohol

查看答案和解析>>

科目: 来源:贵州省遵义四中2012届高三上学期第四次月考英语试题 题型:050

阅读理解

  High school graduation-the bittersweet feelings are as much a part of me now as they were twenty-one years ago.

  As graduation day came near, excitement increased.Being out of high school meant I finally grew up.Soon I would be on my own, making my own decisions, doing what I was interested in without someone looking over my shoulder(惴惴不安).

  There was never any question in my mind that I would go to college.But which college I would attend seemed like a never-ending list of unknowns:What would college be like? Would I make friends easily? Would I miss my family so much that I wouldn't be able to stand it? What if the college I selected turned out to be a terrible mistake?

  Then panic set in.My feelings took a 180-degree mm.I really didn't want to leave high school at all.It had been nice being respected as a Senior by the underclass students for the past year; I didn't enjoy the idea of being on the bottom of the ladder again.

  Despite months of expectation, nothing Could have prepared me for the impact of the actual day.As the familiar tune of "Pomp and Circumstance" echoed(回响)in the background, tears welled up uncontrollably in my eyes, and I was consumed by a rush of sadness.I rose from my seat when I heard my name called and slowly crossed the stage to receive my diploma.As I reached out my hand, I knew that I was reaching not just for a piece of paper but for a new life.Exciting as the future of a new life seemed, it wasn't easy to say goodbye to the old one -- the familiar faces, the' familiar routine.I would even miss that chemistry class I wasn't particularly fond of.

  That September, I was lucky to attend a wonderful university.I needn't have worried about liking it.My years there turned out to be some of the best years of my life.And as for friends, some of the friendships I formed there I still value today.

(1)

The author writes the passage mainly to tell us _________.

[  ]

A.

his high school life

B.

his university life

C.

his bittersweet memories

D.

his graduation ceremony

(2)

The author felt excited about graduation because _________.

[  ]

A.

he could go to college

B.

he could be independent

C.

he was tired of high school life

D.

he won a scholarship to university

(3)

The underlined word "one"(in Paragraph 5)most probably refers to _________.

[  ]

A.

school

B.

diploma

C.

class

D.

life

(4)

We know from the last paragraph that at university the author _________.

[  ]

A.

got on quite well

B.

made few friends

C.

majored in chemistry

D.

missed his family much

查看答案和解析>>

科目: 来源:浙江省瑞安市十校2011-2012学年高一上学期期中联考英语试题 题型:050

阅读理解

  Shopping is not as simple as you may think! There are all sorts of tricks at play each time we reach out for that particular brand of product on the shelf.

  Colouring, for example, varies according to what the producers are trying to sell.Health foods are packaged in greens, yellows or browns because we think of these as healthy colours.Ice cream packets are often blue and expensive goods, like chocolates, are gold or silver.

  When some kind of pain killer was brought out recently, researchers found that the colours turned the customers off because they made the product look weak and ineffective.Eventually, it came on the market in a dark blue and white package-blue because we think of it as safe, and white as calm.

  The size of a product can attract a shopper.But quite often a bottle doesn’t contain as much as it appears to.

  It is believed that the better-known companies spend, on average, 70 percent of the total cost of the product itself on packaging!

  The most successful producers know that it’s not enough to have a good product.The founder of Pears soap, who for 25 years has used pretty little girls to promote(推销)their goods, came to the conclusion:“Any fool can make soap, but it takes a genius(天才)to sell it.”

(1)

Which of the following may trick a shopper into buying a product according to the text?

[  ]

A.

The cost of its package.

B.

The price of the product.

C.

The colour of its package.

D.

The brand name of the product.

(2)

The underlined part “the colours turned the customers off”(in Para.3)means that the colours _________.

[  ]

A.

attracted the customers strongly

B.

caused the customers to lose interest

C.

tricked the customers into shopping

D.

had weak effects on the customers

(3)

Which of the following is the key to the success in product sales?

[  ]

A.

The way to promote goods.

B.

The discovery of a genius.

C.

The team to produce a good product.

D.

The brand name used by successful producers.

(4)

According to the passage, which of the following statement is true?

[  ]

A.

Making soap is so easy that any fool in the world can make it.

B.

Greens, yellows or silver are considered to be healthy colours.

C.

25 years ago, the founder of Pears soap was a pretty girl herself.

D.

The size of a product can have an effect on the shoppers.

(5)

Which of the following would be the best title for this text?

[  ]

A.

Choice of Good Products

B.

Disadvantages of Products

C.

Effect of Packaging on Shopping

D.

Brand Names and Shopping Tricks

查看答案和解析>>

科目: 来源:浙江省瑞安市十校2011-2012学年高一上学期期中联考英语试题 题型:050

阅读理解

Henry Ford was the first person to build cars which were cheap,strong and fast.He was able to se11 millions of models because be could produce them in large numbers at a time;that is,he made a great many cars of exactly the same kind.Ford’s father hoped that his son would be come a farmer,but the young man did not like the idea and he went to Detroit(底特律)where he worked as a mechanic(机械师).By the age of 29,in 1892,he had built his first car.However,the car made in this way,the famous “Model T” did not appear until 1908-five years after Ford bad started his great motor car factory.This car showed to be well-known that it remained unchanged for twenty year.Since Ford’s time,this way of producing cars in large numbers has be come common in industry and has reduced the price of many goods which would otherwise be very expensive.

(1)

Henry Ford was the man to built _________ cars.

[  ]

A.

cheap and strong

B.

cheap and long

C.

fast and expensive

D.

strong and slow

(2)

Ford was able to sell millions of cars, because _________.

[  ]

A.

he made many great cars

B.

his cars are many

C.

he made lots of cars of the same kind

D.

both A and B

(3)

The young man became a mechanic, _________.

[  ]

A.

which was his father’s will

B.

which was against his own will

C.

which was against his father’s will

D.

which was the will of both

(4)

The “Model T” was very famous _________.

[  ]

A.

before 1908

B.

between 1982 and 1908

C.

before 1892

D.

after 1908

(5)

Ford built his own car factory

[  ]

A.

in 1903

B.

in 1908

C.

in 1913

D.

in 1897

查看答案和解析>>

科目: 来源:浙江省瑞安市十校2011-2012学年高一上学期期中联考英语试题 题型:050

阅读理解

(1)

It is said that the love story about Xu Xian and the White Snake happened on _________.

[  ]

A.

Dragon Tower

B.

West Lake

C.

Water Cube

D.

Disneyland

(2)

If a person in Hangzhou feels like visiting Water Cube, he should call _________ to get information.

[  ]

A.

0451-81187899

B.

00852-28029822

C.

0571-68345579

D.

010-28135589

(3)

Disneyland, which attract a lot of tourists from home and abroad every year, is in _________ according to the travel information.

[  ]

A.

Beijing

B.

Hangzhou

C.

Hong Kong

D.

Harbin

(4)

Two travelers plan to have a bird's-eye view(鸟瞰)of Harbin, and they need to pay _________ from the information above.

[  ]

A.

¥60

B.

¥50

C.

¥300

D.

¥150

(5)

Which of the following is TRUE according to the travel information?

[  ]

A.

Water Cube is special in design

B.

The price of a ticket for West Lake is highest.

C.

In Disneyland, you can't see any cartoon characters.

D.

The price of a ticket for Dragon Tower is lowest

查看答案和解析>>

科目: 来源:浙江省瑞安市十校2011-2012学年高一上学期期中联考英语试题 题型:050

阅读理解

  Long time ago, there was a seed and because he was only a seed, nobody noticed him.Thus, feeling inferior(低等的), the seed gave no importance to his existence(存在).

  Then one day, a wind picked him up and threw him on an open field under the sun.Later, he was given rain.

  Years later he saw a traveler sitting by his side."Thank you God for this.I really need some rest," he heard the traveler say.

  "What are you talking about?" the seed quickly asked.He thought the man was making fun of him.No one ever spoke to him like that.

  "Who just spoke?" the shocked man asked."It is me.A seed."

  "A seed?" The man looked at the big tree."Are you joking? You are not a seed.You are a big tree!"

  "Really?" "Yes! Why else do you think people come here?" "What do they come here for?"

  "To feel your shade(树阴)! Don’t tell me you didn’t know you had grown over time."

  A moment passed before the traveler’s words brought him pride.

  The seed thought and smiled for the first time in his life.The years of torture(折磨)by the sun and the rain finally helped him grow up.

  "Oh! That means I’m not a little seed anymore! I was actually born to make people feel comfortable.Wow! That’s great!"

(1)

The seed didn’t realize the importance of his existence because _________.

[  ]

A.

nobody looked after him

B.

he was thrown into the open air

C.

he was such a small seed

D.

he didn’t believe in himself

(2)

The traveler sat by the seed’s side to _________.

[  ]

A.

escape from the rain

B.

thank God for offering him a tree

C.

have a rest and enjoy the shade

D.

talk with the big tree

(3)

How did the seed feel after hearing the traveler’s words at last?

[  ]

A.

Sad.

B.

Proud.

C.

Funny.

D.

Sorry.

(4)

The author’s purpose of writing the passage is to _________.

[  ]

A.

tell us a very interesting story

B.

praise the seed for his strength

C.

teach us a lesson:Don’t laugh at others

D.

tell us that we should never lose hope

(5)

Where does the passage most probably come from?

[  ]

A.

A history book.

B.

A science book.

C.

A storybook.

D.

A novel.

查看答案和解析>>

科目: 来源:浙江省富阳市新登中学2012届高三上学期期中考试英语试题 题型:050

阅读理解

  At Denver there was an crowd of passengers into the coaches(车厢)on the eastbound B.&M.express.In one coach there sat a very pretty young woman dressed in elegant taste and surrounded by all the luxurious comforts of an experienced traveler.Among the newcomers were two young men, one of handsome presence with a bold, frank face expression and manner; the other a ruffled, glum-faced person, heavily built and roughly dressed.The two were handcuffed(拷上手铐)together.

  As they passed down the aisle of the coach the only available seat offered was a reversed one facing the attractive young woman.Here the linked couple seated themselves.The young woman's glance fell upon them with a distant, swift disinterest; then with a lovely smile brightening her face and a tender pink tingeing(稍加染色,影响)her rounded cheeks, she held out a little gray-gloved hand.When she spoke her voice, full, sweet, and deliberate, proclaimed that its owner was accustomed to speak and be heard.

  "Well, Mr.Easton, if you will make me speak first, I suppose I must.Don't you ever recognize old friends when you meet them in the West?"

  The younger man aroused himself sharply at the sound of her voice, seemed to struggle with a slight embarrassment which he threw off instantly, and then clasped her fingers with his left hand.

  "It's Miss Fairchild," he said, with a smile."I'll ask you to excuse the other hand; "it's otherwise engaged just at present."

  He slightly raised his right hand, bound at the wrist by the shining "bracelet" to the left one of his companion.The glad look in the girl's eyes slowly changed to a bewildered horror.The glow faded from her cheeks.Her lips parted in a vague(含糊,犹豫), relaxing distress.Easton, with a little laugh, as if amused, was about to speak again when the other forestalled him.The glum-faced man had been watching the girl's face expression with veiled glances from his keen, shrewd eyes.

  "You'll excuse me for speaking, miss, but, I see you're acquainted with(认识,熟悉)the officer here.If you'll ask him to speak a word for me when we get to the pen(围栏,监狱)he'll do it, and it'll make things easier for me there.He's taking me to Leavenworth prison.It's seven years for cheating."

  "Oh!" said the girl, with a deep breath and returning color."So that is what you are doing out here? An officer!"

  "My dear Miss Fairchild," said Easton, calmly, "I had to do something.Money has a way of taking wings with itself, and you know it takes money to keep step with our crowd in Washington.I saw this opening(通道)in the West, and--well, an officer isn't quite as high a position as that of ambassador, but--"

  "The ambassador," said the girl, warmly, "doesn't call any more.I needn't ever have done so.You ought to know that.And so now you are one of these brave Western heroes, and you ride and shoot and go into all kinds of dangers.That's different from the Washington life.You have been missed from the old crowd."

  The girl's eyes, fascinated, went back, widening a little, to rest upon the glittering handcuffs.

  "Don't you worry about them, miss," said the other man."All officers handcuff themselves to their prisoners to keep them from getting away.Mr.Easton knows his business."

  "Will we see you again soon in Washington?" asked the girl.

  "Not soon, I think," said Easton."My butterfly days are over, I fear."

  "I love the West," said the girl irrelevantly.Her eyes were shining softly.She looked away out the car window.She began to speak truly and simply without the gloss of style and manner:"Mamma and I spent the summer in Denver.She went home a week ago because father was slightly ill.I could live and be happy in the West.I think the air here agrees with me.Money isn't everything.But people always misunderstand things and remain stupid--"

  "Say, officer," shouted the glum-faced man."This isn't quite fair.I'm needing a drink, and haven't had a smoke all day.Haven't you talked long enough? Take me in the smoker now, won't you? I'm half dead for a pipe."

  The bound travelers rose to their feet, Easton with the same slow smile on his face.

  "I can't deny a require for tobacco," he said, lightly."It's the one friend of the unfortunate.Good-bye, Miss Fairchild.Duty calls, you know." He held out his hand for a farewell.

  "It's too bad you are not going East," she said, reclothing herself with manner and style."But you must go on to Leavenworth, I suppose?"

  "Yes," said Easton, "I must go on to Leavenworth."

  The two men sidled down the aisle into the smoker.

  The two passengers in a seat near by had heard most of the conversation.Said one of them:"That officer is a good sort of man.Some of these Western fellows are all right."

  "Pretty young to hold an office like that, isn't he?" asked the other.

  "Young!" exclaimed the first speaker, "why-Oh! Didn't you catch on? Say-did you ever know an officer to handcuff a prisoner to his right hand?"

(1)

From the first three paragraphs, we know that ________

[  ]

A.

the two young were seated opposite to the young woman by accident.

B.

it was not difficult for the woman to find the men were handcuffed

C.

the young woman found she knew one of the men at the first sight of them.

D.

the young woman may not be good at communicate

(2)

What would be the possible sentence following the underlined “and ________“

[  ]

A.

and it is not easy to make such a fortune

B.

and I do the cheating things to collect money

C.

and I tried my best to be a good officer

D.

and the West is bond to be wealthy

(3)

When Easton uttered the underlined sentence "My butterfly days are over, I fear", his real meaning was that ________

[  ]

A.

he would have to focus on his work

B.

he would be put in prison

C.

his chance of being with butterfly is small

D.

his workload as an officer was heavy

(4)

Why did the glum-faced man urge Easton to the smoker?

[  ]

A.

Because he needed a drink and tobacco badly.

B.

Because he was angry that Miss Fairchild did not say any good words for him

C.

Because he was bored and tired with Miss Fairchild and Easton’s talk.

D.

Because he was afraid Miss Fairchild would find the truth.

(5)

Which of the following can NOT be inferred from the passage?

[  ]

A.

Miss Fairchild was an ambassador

B.

Easton was an officer with his prisoner

C.

the glum-faced was considerate and careful

D.

Easton had been trying to make a big fortune in the West

(6)

What was the best title of the passage?

[  ]

A.

Miss Fairchild’s Trip

B.

Hearts and Hands

C.

The Story of a Handcuff

D.

The Meeting of Two Friends

查看答案和解析>>

科目: 来源:浙江省富阳市新登中学2012届高三上学期期中考试英语试题 题型:050

阅读理解

  “Image is everything.” An entire industry has been built upon the assumption that image is everything, but when it comes down to it, an appealing image is not enough.If there is no substance(事实)behind the image, the product, service or person will fail eventually.

  First of all, one should consider how important image is in the selling of products and services.Advertising agencies have raised the art of creating an image to a state of near perfection.Public concept of that product or service is certainly managed by the images created by the advertising agencies.But if the product or service does not live up to the image that was created, the customer will be very dissatisfied and possibly ask for their money back.For example, the Arthur Andersen accounting firm had spent decades building up an image of trustworthiness.But the recent scandal(丑闻)showed that behind that image, it cheated in business practices.Despite the previous positive image, the firm is being accused of criminal actions and it will probably not survive as a business unit.Although the image had been nearly perfect, the reality behind the image has led to the downfall of the world famous accounting firm.

  Similarly, personal advisers can build up a public image for politicians and movie stars.Putting out positive news releases, making sure that only the best photographs are published, and ensuring that the person is seen in all the right places can build up a very positive image in the view of the general commons.But once again, history is filled with examples of both politicians and movie stars that fell from grace like the story of the Hollywood actor giving in to the pressures of fame and fortune.With people, just as with products and services, image is certainly important, but without positive substance behind the image, failure is close.

  To summarize, it is clear that an appealing image is extremely important to success, whether that image is related to selling a product or service or to the “selling” of a person.But image is only half of the equation.What lies behind that image is every bit as important as the image itself——the person or product must deliver on that image or there is little chance for long-term success.

(1)

The downfall of the Arthour Andersen accounting firm is due to ________.

[  ]

A.

its dishonesty in business

B.

its previous images

C.

its bad management

D.

its poor service

(2)

Why did some famous people fall from grace?

[  ]

A.

Their images were not well built up

B.

They failed to live up to their images.

C.

They felt much pressure from the public

D.

They paid little attention to fame and fortune.

(3)

The structure of the passage is ________.

A:Argument

P:Point

C:Conclusion

[  ]

A.

B.

C.

D.

(4)

The author tries to argue that ________.

[  ]

A.

image creates everything

B.

image is the key to success

C.

truth is unlikely ever to be equalled

D.

truth and image are equally important

查看答案和解析>>

科目: 来源:浙江省富阳市新登中学2012届高三上学期期中考试英语试题 题型:050

阅读理解

  Many people influenced various aspects of my life, based on their personal characteristics, accomplishments, and values.I have been fortunate to have had numerous teachers and professors who I respect for their patience and intelligence.There are artists that have inspired me by their natural talents and original creativity.I value many political leaders, who have inspired me by their contributions to society, and their ability to change our futures.But of all the people I have known in my life, the person I admire most is my father.

  As the youngest girl in my family, I always considered myself to be “Daddy’s little girl”.While I grew up, it always made me sad to see so many of my friends and neighbors without a father or father-like figure around.This helped me appreciate how my father always takes an interest in his children’s lives.In every aspect of my life my father continuously pushes me to excel, so I could accomplish my work outstandingly among my people.Whenever I feel like giving up, or have a question or a concern, I know I can always call on him for advice.From him I have also learned that sometimes you have to put others’ needs ahead of your own, but you should make sure you are not taken advantage of by others.His strength seems to be unbreakable during hard times, and he is extremely determined to accomplish anything he sets his mind on, no matter how tiny it is.I highly respect him for how he stands up for what he believes in, and will never back down.I have always admired his open mind, compassion for people, and sense of understanding.He is a very reserved man, but to everybody’s surprise, he has a great sense of humor, and always knows how to put a smile on the faces of his wife, his children and his friends.

  Living in his affection and instruction, I am very proud of my father.He also professes how proud he is of his children, and is still there to support us in whatever we are involved in.

(1)

What is the best title for the passage?

[  ]

A.

How my father loved me

B.

My father-the person I admire most

C.

I am the apple on my father’s palm

D.

My father-the one who influenced me most

(2)

Which of the following could not be used to describe the author’s father?

[  ]

A.

Considerate and humorous

B.

Affectionate and open-minded

C.

Knowledgeable and sociable

D.

Energetic and helpful

(3)

Which of the following can best explain the underlined word “excel”?

[  ]

A.

Do better than others.

B.

Show off.

C.

Be cleverer than others.

D.

Keep healthy

(4)

According to the underlined part, the father was telling the author to ________.

[  ]

A.

try to be good to those who were worth making friends with

B.

try to take advantage of those who were friendly to her

C.

think about others and help them, so that she could make them serve her

D.

think about others and help them, but not to be made use of in a negative way

(5)

What can we infer about the author?

[  ]

A.

She appreciated her father because he solved all the problems for her.

B.

She considered her father humorous and was often made to laugh by him.

C.

She had sympathy(认同)for the fatherless.

D.

She was outstanding in work because her father pushed her hard.

查看答案和解析>>

同步练习册答案