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All that we really need to plot out the future of our universe are a few good measurements

. This does not mean that we can sit down today and outline the future course of the universe with anything like certainty. There are still too many things we do not know about the way the universe is put together. But we do know exactly what information we need to fill in our knowledge, and we have a pretty good idea of how to go about getting it.

Perhaps the best way to think of our present situation is to imagine a train coming into a switchyard. All of the switches are set before the train arrives, so that its path is completely determined. Some switches we can see, others we can not. There is no ambiguity if we can see the setting of a switch: we can say with confidence that some possible futures will not materialize and others will. At the unseen switches, however, there is no such certainty. We know the train will take one of the tracks leading out, but we have no idea which one. The unseen switches are the true decision points in the future, and what happens when we arrive at them determines the entire subsequent course of events.

When we think about the future of the universe, we can see our "track" many billions of years into the future, but after that there are decision points to be dealt with and possible fates to consider. The goal of science is to reduce the ambiguity at the decision points and find the true road that will be followed.

According to the passage, it is difficult to be certain about the distant future of the universe because we ______.

A.have too many conflicting theories

B.do not have enough funding to continue our research

C.are not sure how the universe is put together

D.have focused on investigations of the moon and planets

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更多“All that we really need to plo…”相关的问题
第1题
Have you 【B1】______ asked yourself why children go to school? You will probably say that t
hey go 【B2】______ their own language and other languages, arithmetic, history, science and 【B3】______ subjects. That is quite true, but why do they learn these things? And are these things 【B4】______ that they learn at school?

We 【B5】______ our children to 【B6】______ them for the time 【B7】______ they will be big and will have work 【B8】______ themselves. Nearly all they study at school has some 【B9】______ use in their life. But is that the only reason 【B10】______ they do to school?

There is 【B11】______ in education then we have just learning facts. We go to school 【B12】______ all to lean how to learn 【B13】______ when we have 【B14】______ school we can continue to learn. A man who really knows 【B15】______ will always be successful. Because 【B16】______ he has to do something new which he has never had to do 【B17】______ , he does it in the best 【B18】______ . The uneducated person 【B19】______ , is probably unable to do something new, or does it badly. The purpose of schools, therefore, is not just to teach languages 【B20】______ to teach pupils the way to learn.

A.either

B.whether

C.ever

D.as well

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第2题
We can make mistakes at any age. Some mistakes we make are about money. But most mistakes
are about people. "Did Jerry really care when I broke up with Helen? .... When I got that great job, did Jim really feel good about it, as a friend? Or did he envy my luck?" When we look back, doubts like these can make us feel bad. But when we look back, it' s too late.

Why do we go wrong about our friends or our enemies? Sometimes what people say hides their real meaning. And if we don' t really listen closely we miss the feeling behind the words. Suppose someone tells you, "You' re a lucky dog." That' s being friendly. But "lucky dog?" There' s a bit of envy in those words. Maybe he doesn' t see it himself. But bringing in the "dog" puts you down a little. What he may be saying is that he doesn' t think you deserve your luck.

"Just think of all the things you have to be thankful for is another noise that says one thing and means another. It could mean that the speaker is trying to get you to see your problem as part of your life as a whole. But is he? Wrapped up in this phrase is the thought that your problem isn' t important. It' s telling you to think of all the starving people in the world when you haven't got a date for Saturday night.

How can you tell the real meaning behind someone' s words? One way is to take a good look at the person talking. Do his words fit the way he looks? Does what he says agree with the tone of voice? His posture? The look in his eyes? Stop and think. The minute you spend thinking about the real meaning of what people say to you may save another mistake.

This passage is mainly about ______.

A.how to interpret what people say

B.what to do when. you listen to others talking

C.how to avoid mistakes when you communicate with people

D.why we go wrong with people sometimes

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第3题
A.as B.for C.to D.beyond E.outLove to us human is what water _____1 fish.Love shines the
A.as B.for C.to D.beyond E.out

Love to us human is what water _____1 fish.Love shines the most beautiful light of humanity.We were born in it and we live by it.We should cherish love,but too often we take it_____2granted.How to cherish the love?I have heard a saying:the quickest way to receive love is to giveit;the fastest way to lose love is to hold it too tightly;the best way to keep love is to give it wings.

When you are young,you may want several love experiences.But _____3 time goes on,you willrealize that if you really love someone,the whole life will not be enough.You need time to know,to forgive and to love.It is important for us to learn to love as the first class in our life.Only whenyou know how to love will you be a real man in this world.Love brings us bright when life gets hard and dark.Love brings us confidence toward life when we are tired _____4 and want to give up.Love deserves all the admiring words,and love is even _____5 the life and death.That is what love is all about in my eyes.

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第4题
God's Coffee

A group of alumni(男毕业生), highly __31__ in their careers, got together to visit their old university professor. Conversation soon turned into __32__ about stress in work and life.

__33__ his guests coffee, the professor went to the kitchen and __34__ with a large pot of coffee and an assortment of cups - porcelain, plastic, glass, crystal, some

__35__ looking,some expensive, some exquisite - __36__ them to help themselves to the coffee.

When all the students had a cup of coffee in hand, the professor said: 'If you noticed, all the nice looking expensive cups were __37__, leaving behind the plain and cheap ones. __38__ it is normal for you to want only the best for yourselves, that is the __39__ of your problems and stress. Be assured that the cup itself __40__ no quality to the coffee. In most cases it is just more expensive and in some cases even __41__ what we drink.What all of you really wanted was coffee, not the cup, but you __42__ went for the best cups... And then you began __43__ each other's cups. Now __44__ this: Life is the coffee; the jobs, money and __45__ in society are the cups. They are just __46__ to hold and __47__ life, and the type of cup we have does not __48__, nor change the quality of Life we live. Sometimes, by concentrating only on the cup, we __49__ to enjoy the coffee God has provided us.' God brews the coffee, not the cups...

Enjoy your coffee! 'The happiest people don't have the best of everything. They just make the best of everything.'Live simply. Love generously.Care deeply.Speak kindly.Leave the __50__ to God.

A.established

B.prepared

C.devoted

D.defeated

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第5题
How men first learned to invent words is unknown; in other words, the origin of language i
s a mystery. All we really know is that men, unlike animals, invented certain sounds to express thoughts and feelings, actions and things, so that they could communicate with each other, and later they agreed on certain signs. These signs were called letters, which could be combined to represent those sounds and could be written down. Those sounds, whether spoken or written in letters, are called words.

The power of words, then, exists in their associations—the things they bring up before our minds. Words become filled with meaning for us by experience, and the longer we live, the more certain words remind us of the glad and sad events of our past, and the more we read and learn, the more number of words increases.

Great writers are those who not only have great thoughts but also express these thoughts in words which deeply attract our minds and emotions. This skillful use of words is called "literary style". Above all, a real poet can express his meaning in words which sing like music and can move men to tears. We should, therefore, learn to choose our words carefully and use them properly, or they will make our speech silly and vulgar.

The origin of language is______.

A.treasure handed down from the past

B.a matter that is hidden or secret

C.a problem not yet solved

D.a question difficult to answer

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第6题
Every country tends to accept its own way of life as being the normal one and to praise or
criticize others as they are similar to or different from it. And unfortunately, our picture of the people and the way of life of other countries is often a distorted(曲解)one.

Here is a great argument in favor of foreign travel and learning foreign languages. It is only by traveling in, or living in a country and getting to know its inhabitants and their language that one can find out what a country and its people are really like. And how different the knowledge one gains this way frequently turns out to be from the second-hand information gathered from other sources! How often we find that the foreigners whom we thought to be such different people from ourselves are not very different after all!

Differences between peoples do, of course, exist and, one hopes, will always continue to do so. The world will be a dull place indeed when all the different nationalities behave exactly alike, and some people might say that we are rapidly approaching this state of affairs. With the much greater rapidity and ease of travel, there might seem to be some truth in this at least as far as Europe is concerned. However this may be, at least the greater ease of travel today has revealed to more people than ever before that the Englishman or Frenchman or German is not some different kind of animal from themselves.

Every country criticizes ways of life in other countries because they are______.

A.distorted

B.normal

C.similar to each other

D.different from its own

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第7题
Every country tends to accept its own way of life as being the normal one and to praise or
criticize others as they are similar to or different from it. And unfortunately, our picture of the people and the way of life of other countries is often a distorted(曲折) one.

Here is a great argument in favor of foreign travel and learning foreign languages. It is only by traveling in, or living in a country and getting to know its inhabitants and their language that one can find out what a country and its people are really like. And how different the knowledge one gains this way frequently turns out to be from the second-hand information gathered from other sources! How often we find that the foreigners whom we thought to be such different people from ourselves are not very different after all!

Differences between peoples do, of course, exist and, one hopes, will always continue to do so. The world will be a dull place indeed when all the different nationalities behave exactly alike, and some people might say that we are rapidly approaching this state of affairs. With the much greater rapidity and ease of travel, there might seem to be some truth in this at least as far as Europe is concerned. However this may be, at least the greater ease of travel today has revealed to more people than ever before that the Englishman or Frenchman or German is not some different kind of animal from themselves.

Every country criticizes ways of life in other countries because they are______.

A.distorted

B.normal

C.similar to each other

D.different from its own

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第8题
Education is not an end, but a means to an end. In other words, we do not educate children
only for the purpose of educating them; our purpose is to prepare them for life. As soon as we realize this fact, we will understand that it is very important to choose a system of education which will really prepare children for life. It is not enough just to choose the first system of education one finds, or to continue with one's old system of enducation without examining it to see whether it is in fact suitable or not.

In many modem countries it has for some time been fashionable to think that, by free education for all-whether rich or poor, clever or stupid--one can solve all the problems of society and build a perfect nation. But we can already see that free education for all is not enough; we find in such countries a far larger number of people with university degrees than there are jobs for them to fill. Because of their degrees, they refuse to do what they consider" low" work; and, in fact, work with the hands is thought to be dirty and shameful in such countries.

But we have only to think a moment to understand that the work of a completely uneducated farmer is far more important than that of a professor, We can live without education, but we die if we have no food. If no one cleaned our streets and took the rubbish away from our houses, we would have terrible diseases in our towns. In countries where there are no servants because everyone is ashamed to do such work, scientists have to waste much of their time doing housework.

In fact, when we say that all of us must be educated to prepare for life, it means that we must be educated in such a way that, firstly, each of us can do whatever job is suited to his brain and ability and, secondly, that we can realize that all jobs are necessary to society, and it is very bad to be ashamed of one's work, or to scorn someone else's. Only such a type of education can be called valuable to society.

Education is ______.

A.a means

B.a purpose

C.fashionable

D.the first system

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第9题
One summer night, on my way home from work I decided to see a movie. I knew the theatre wo
uld be air-conditioned and I couldn't face my【56】apartment. Sitting in the theatre I had to look through the【57】between the two tall heads in front of me. I had to keep changing the【58】every time she leaned over to talk to him,【59】he leaned over to kiss her. Why do Americans display such【60】in a public place? I thought the movie would be good for my English, but【61】it turned out, it was an Italian movie.【62】about an hour I decided to give up on the movie and【63】on my popcorn. I've never understood why they give you so much popcorn ! It tasted pretty good,【64】. After a while I heard【65】more of the romantic sounding Italians. I just heard【66】of the popcorn crunching between my teeth. My thought started to【67】. I remembered when I was in South Korea, I【68】to watch Kojak on TV frequently. He spoke perfect Korean—I was really amazed. He seemed,【69】like a good friend to me. I saw him again in New York speaking【70】English instead of perfect Korean. He didn't even have a Korean accent and I【71】like I had been betrayed. When our family moved to the United States six years ago, none of us spoke any English.【72】we had begun to learn a few words, my mother suggested that we all should speak English at home. Everyone agreed, but our house became very【73】and we all seemed to avoid each other. We sat at the dinner table in silence, preferring not to【74】in a difficult language. Mother tried to say something in English but it【75】out all wrong and we all burst into laughter and decided to forget it I We've been speaking Korean at home ever since.

(56)

A.hot

B.warm

C.cool

D.heated

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第10题
Everyone knows that taxation is necessary in a modern state:【51】it, it would not be possib
le to pay the soldiers and policemen who【52】us; 【53】the workers in government offices who look after our health, our food, our water, and all【54】things that we cannot do for ourselves.【55】of taxation, we pay for things that we need【56】as much as we need somewhere to live and something to eat.

In most countries, a direct tax on persons, 【57】is called income tax, exists. It is arranged in【58】a way that the poorest people pay nothing, and the【59】of tax grows greater as the taxpayers'【60】grows. In England, for example, the tax on the【61】people goes up as【62】as ninety-five percent!

But countries with direct taxation nearly always have【63】taxation too. Many things【64】into the country have to pay taxes or "duties".【65】, it is the men and women who buy these imported things in the shops who really have to pay the duties, in the【66】of higher prices. In some countries, too, there is a tax on things sold in the shops. If the most necessary things are taxed, a lot of money is collected, but the poor people suffer【67】If unnecessary things like jewels and fur coats are taxed, 【68】money is obtained, but the tax is fairer, as the【69】pay it.

Probably this last kind of indirect tax, 【70】with a direct tax on incomes which is low for the poor and high for the rich, is the best arrangement.

(51)

A.but for

B.without

C.because of

D.instead of

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第11题
In the late 1920s my mother ran away from home to marry my father.Marriage,if not run
ning away,was expected of 17-year-old girls.By the time she was 20,she had 2 children and was pregnant with a third.5 children later,I was born.And this is how I came to know my mother:she seemed a large,soft,loving-eyed woman who was rarely impatient in our home.Her quick,violent temper was on view only a few times a year,when she battled with the white landlord who had the misfortune to suggest to her that her children did not need to go to school.She made all the clothes we wore,even my brothers' overalls.She made all the towels and sheets we used. She spent the summers canning vegetables and fruits.She spent the winter evenings making quilts enough to cover all our beds.During the "working" day,she labored beside-not behind-my father in the fields.Her day began before sunup,and did not end until late at night.There was never a moment for her to sit down,undisturbed,to unravel her own private thoughts;never a time free from interruption-by work or the noisy inquiries of her many children.And yet,it is to my mother-and all our mothers who were not famous-that I went in search of the secret of what has fed that muzzled and often mutilated,but vibrant,creative spirit that the black woman has inherited,and that pops out in wild and unlikly places to this day.

It seems to the narrator that it would be really good if ()

A、the mother worked from sunup till night

B、the mother worked side by side with her husband

C、the mother made all things that the family needed

D、the mother could have some time to think undisturbed

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