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[单选题]
We have replaced human labor with machines________.
A.substituted
B.reduced
C.remained
D.removed
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题目内容
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题目内容
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A.substituted
B.reduced
C.remained
D.removed
如果结果不匹配，请 联系老师 获取答案
更多“We have replaced human labor w…”相关的问题
And we can't even use all of that, because some of it is in the form. of icebergs and glaciers. Even worse, some of it has been polluted.
However, as things stand today, this small amount of fresh water, which is constantly being replaced by rainfall, is still enough for us. But our need_ 3__ water is increasing rapidly – almost day by day. We all have to learn how to stop wasting our previous water. One of the first steps we should _4_ is to develop ways of reusing it.
Experiments have already been done in this__ 5_ but only on a small scale. The systems that have been worked out resemble those used in spacecraft.
A、take
B、or
C、sources
D、for
E、case
22.A.protect
B.hide
C.display
D.set aside
23.A.hold
B.held
C.that hold
D.that holding
24.A.used to make
B.is used to make
C.is used to making
D.used to making
25.A.perfectly
B.perfect
C.perfection
D.perfected
26.A.from
B.in
C.with
D.beyond
27.A.so as
B.as that
C.so that
D.such that
28.A.ever
B.rather
C.more
D.much
29.A.under
B.below
C.within
D.on
30.A.goodness
B.advance
C.advantage
D.progress
Sporting activities are essentially modified forms of hunting behaviour. Viewed biologically, the modern footballer is in reality a member of a hunting group. His killing weapon has turned into a harmless football and his prey (猎物) into a goal mouth. If his aim is accurate and he scores a goal, he enjoys the hunter’s triumph of killing his prey.
To understand how this transformation has taken place we must briefly look back at our forefathers. They spent over a million years evolving (进化) as cooperative hunters. Their very survival depended on success in the hunting-field. Under this pressure their whole way of life, even their bodies, became greatly changed. They became chasers, runners, jumpers, aimers, throwers and prey-killers. They cooperated as skillful male-group attackers.
Then about ten thousand years ago, after this immensely long period of hunting their food, they became farmers. Their improved intelligence, so vital to their old hunting life, was put to a new use--that of controlling and domesticating their prey. The hunt became suddenly out of date. The food was there on the farms, awaiting their needs. The risks and uncertainties of the hunt were no longer essential for survival.
The skills and thirst for hunting remained, however, and demanded new outlets. Hunting for sport replaced hunting for necessity. This new activity involved all the original hunting sequences but the aim of the operation was no longer to avoid starvation. Instead the sportsmen set off to test their skill against prey that were no longer essential to their survival. To be sure, the kill may have been eaten but there were other much simpler ways of obtaining a meaty meal.
The author believes that sporting activities （）.
A.are forms of biological development
B.have actually developed from hunting
C.are essentially forms of taming the prey .
D.have changed the ways of hunting
A、think clearly
B、think for the moment
C、have stupid ideas
D、have brilliant ideas
A man who knows a bit about carpentry (木工术) will make his table more quickly than the man who does not. If the instructions are not very clear, or the shape of a piece is puzzling his experience helps him to conclude that it must fit there, or that its function must be that. In the same way, the reader's sense and experience helps him to predict what the writer is likely to ,say next; that he must be going to say this rather than that. A reader who can think along with the writer in this way will find the text.
This skill is so useful that you may wish to make your students aware of it so that they can use it to tackle difficult texts. It does seem to be the case that as we read we make hypotheses (假设) about what the writer intends to say; these are immediately modified by what he actually does say, and are replaced by new hypotheses about what will follow. We have all had the experience of believing we were understanding a text until suddenly brought to a halt by some word or phrase that would not fit into the pattern and forced us to reread and readjust our thoughts. Such occurrences lend support to the notion of reading as a constant making and remaking of hypotheses.
If you are interested in finding out how far this idea accords with (符合) practice, you may like to try out the text and questions. To do so, take a piece of card and use it to mask the text. Move it down the page, revealing only one
t a time. Answer the question before you go on to look at the next section. Check your prediction against what the text actually says, and use the new knowledge to improve your next prediction. You will need to look back to earlier parts of the text if you are to make accurate prediction, for you must keep in mind the general organization of the argument as well as the detail within each sentence. If you have tried this out, you have probably been interested to find how much you can predict, though naturally we should not expect to be right every time -- otherwise there would be no need for us to read.
Conscious use of this technique can be helpful when we are faced with a part of the text that we find difficult: if we can see the overall pattern of the text, and the way the argument is organized, we can make a reasoned guess at the next step. Having an idea of what something might mean can be a great help in interpreting it.
The author uses the examples of carpentry and reading to show______.
A．the importance of making prediction
B．the similarity in using one's senses
C．the necessity of making use of one's knowledge
D．the most effective method in doing anything
Death is normal; we are genetically programmed to disintegrate and perish, even under ideal conditions. We all under stand that at some level, yet as medical consumers we treat death as a problem to be solved. Shielded by third-party payers from the cost of our care, we demand everything that can possibly be done for us, even if it's useless. The most obvious example is late-stage cancer care. Physicians—frustrated by their inability to cure the disease and fearing loss of hope in the patient—too often offer aggressive treatment far beyond what is scientifically justified.
In 1950, the U.S. spent $12.7 billion on health care. In 2002, the cost will be $1540 billion. Anyone can see this trend is unsustainable. Yet few seem willing to try to reverse it. Some scholars conclude that a government with finite re sources should simply stop paying for medical care that sustains life beyond a certain age—say 83 or so. Former Colorado governor Richard Lamm has been quoted as saying that the old and infirm "have a duty to die and get out of the way", so that younger, healthier people can realize their potential.
I would not go that far. Energetic people now routinely work through their 60s and beyond, and remain dazzlingly productive. At 78, Viacom chairman Stunner Redstone jokingly claims to be 53. Supreme Court Justice Sandra Day O'Connor is in her 70s, and former surgeon general C. Everett Koop chairs an Internet start-up in his 80s. These leaders are living proof that prevention works and that we can manage the health problems that come naturally with age. As a mere 68-year-old, I wish to age as productively as they have.
Yet there are limits to what a society can spend in this pursuit. Ask a physician, I know the most costly and dramatic measures may be ineffective and painful. I also know that people in Japan and Sweden, countries that spend far less on medical care, have achieved longer, healthier lives than we have. As a nation, we may be overfunding the quest for unlikely cures while underfunding research on humbler therapies that could improve people's lives.
What is implied in the first sentence？
A．Americans are better prepared for death than other people.
B．Americans enjoy a higher life quality than ever before.
C．Americans are over-confident of their medical technology.
D．Americans take a vain pride in their long life expectancy.
In my fridgeless Fifties childhood, 1 was fed well and healthy.The milkman came every day, the grocer, the butcher (肉商), the baker, and the ice-cream man delivered two or three times each week.The Sunday meat would last until Wednesday and surplus(剩余的) bread and milk became all kinds of cakes.Nothing was wasted, and we were never troubled by rotten food.Thirty years on food deliveries have ceased, fresh vegetables are almost unobtainable in the country.
The invention of the fridge contributed comparatively little to the art of food preservation.Many well-tried techniques already existed -- natural cooling, drying, smoking, salting, sugaring, bottling...
What refrigeration did promote was marketing --- marketing hardware and electricity, marketing soft drinks, marketing dead bodies of animals around the world in search of a good price.
Consequently, most of the world's fridges are to be found, not in the tropics where they might prove useful, but in the rich countries with mild temperatures where they are climatically almost unnecessary.Every winter, millions of fridges hum away continuously, and at vast expense, busily maintaining an artificially-cooled space inside an artificially-heated house -- while outside, nature provides the desired temperature free of charge.
The fridge's effect upon the environment has been evident, while its contribution to human happiness has been not important.
1.The statement "In my fridgeless fifties childhood, I was fed well and healthily." suggests that the author was well-fed and healthy even without a fridge in his fifties.()
2.The author says that nothing was wasted before the invention of fridges because people had effective ways to preserve food.()
3.Consumers benefited the most from fridges according to the author？()
4.What refrigeration did promote was food-preserving.()
5.The author is critical to fridges.()
On earth gravity (引力) makes blood flow down towards the feet, so the heart must work to pump blood up. In space blood flows up towards the heart. The effect is similar to what happens when you lie with your feet up and your head down. The flowing blood is felt by receptors in the walls of arteries (动脉) in the upper part of the body and in the heart. These receptors send signals to the brain, but the brain reads them incorrectly. To the brain, the signals means the amount of blood in the body has increased, so the brain tells other parts of the body to react to the increase in the blood. For example, the body produces more urine (尿液), resulting in loss of body fluid and salt. At the same time the astronaut has less desire to drink and so does not replace the lost fluid.
As a spacecraft begins to fall back to earth atmosphere, the crew begins to feel gravity. Blood again flows towards the feet and collects there. The heart beats faster in an effort to pump enough blood to the brain. Some crew members may not get enough blood to the brain and the heart beats too fast. They become sick and even lose consciousness as their spacecraft reenters the earth atmosphere. To prevent this, special clothing is invited for astronauts to prevent blood collecting in their legs. They put it on just before the craft reenters the earth’s atmosphere. They also drink about a liter (升) of water and eat some salt to replace the fluid they have lost while in space.
Weightlessness affects the heart and blood vessels in another way. The heart does not work as hard in a weightless environment as it does in an environment of gravity. When the heart works less hard, the heart muscles become weaker. It is replaced by fibrous tissue and fat
41.If one lies with his feet up and his head down on earth, his()
A.blood will flow up towards the heart.
B.blood will flow down towards the feet.
C.heart will pump the blood up to the head.
D.heart will have to work harder.
42.What can we infer from the second paragraph of the passage()
A.The brain reads the signals incorrectly because it tends to go wrong in outer space
B.In space an astronaut should drink some water even when he does not feel thirsty.
C.In space the amount of water in the body of an astronaut increase.
D.The receptors in the walls of arteries often send wrong signals to the brain.
43.When the spacecraft reenters the earth’s atmosphere some astronauts become sick or even lose consciousness because()
A.their brains cannot get enough blood
B.their hearts are not strong enough
C.their blood collects in their feet
D.they begin to feel the gravity again
44.When the spacecraft enter the earth’s atmosphere, the astronauts should do the following except()
A.trying to regain their consciousness
B.eating some salt
C.drinking some water.
D.putting on special clothing
45.After a long time in space, an astronaut’s heart muscles become weaker because()
A.they are short of exercises when the heart works less hard.
B.the heart works too hard under an environment of weightlessness.
C.the astronaut’s hard work puts too great a burden on the heart.
D.they are completely replaced by fibrous tissue and fat.
A.which gate we have to go
B.which gate have we to go
C.which gate we have to go to
D.where we have to go to
