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[主观题]
If we __ sooner, we might have got there. A．started B．had started C．would have started
D．start
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更多“If we __ sooner, we might have…”相关的问题
______ had we sat down than the telephone rang.
A. Almost
B. No sooner
C. Hardly
D. Just
When should we hand in the homework？
A．The more, the better.
B．The sooner, the better.
C．The quick, the better.
D．The faster, the better.
From the story of Wang Lina we can learn that______.
A．the sooner you go to the countryside, the sooner you will be successful
B．local farmers can get big harvests if they learn more knowledge
C．university graduates can also realize their value in rural areas
D．Wang had great difficulty in helping villagers planting organic strawberries
The only solid piece of scientific truth about which I feel totally confident is that we are profoundly ignorant about nature. Indeed, I regard this as the major discovery of the past hundred years of biology. It is, in its way, an illuminating piece of news. It would have amazed the brightest minds of the 18th century Enlightenment to be told by any of us how little we know and how bewildering the way ahead seems. It is this sudden confrontation with the depth and scope of ignorance that represents the most significant contribution of the 20th century science to the human intellect. In earlier times, we either pretended to understand how things worked or ignored the problem, or simply made up stories to fill the gaps. Now that we have begun exploring in earnest, we are getting glimpses of how huge the questions are, and how far from being answered. Because of this, we are depressed. It is not so bad being ignorant if you are totally ignorant; the hard thing is knowing in some detail the reality of ignorance, the worst spots and here and there the not-so-bad spots, but no true light at the end of the tunnel or even any tunnels can yet be trusted.
But we are making a beginning, and there ought to be some satisfaction. There are probably no questions we can think up that cannot be answered, sooner or later, including even the matter of consciousness. To be sure, there may well be questions we cannot think up, ever, and therefore limits to the reach of human intellect, but that is another matter. Within our limits, we should be able to work our way through to all our answers, if we keep at it long enough, and pay attention.
It can be inferred from the passage that scientists of the 18th century______.
A．thought that they knew a great deal and could solve most problems of science
B．were afraid of facing up to the realities of scientific research
C．knew that they were ignorant and wanted to know more about nature
D．did more harm than good in promoting man's understanding of nature
But we still retain our primitive optimism about air and water. There will always be enough rain falling from the skies to meet our needs. The air can absorb all the filth we care to put in it. Still less do we worry whether we could ever run short of oxygen. Surely there is air enough to breathe. Who ever asks where oxygen comes from, to begin with？ They should—for we now consume about 10 percent of all the atmospheric oxygen every year, thanks to the many forms of combustion which destroy it; every car, aircraft and power station destroys oxygen in quantities far greater than men consume by breathing.
The fact is we are just beginning to press up against the limits of the earth's capacity. We begin to have to watch what we are doing to things like water and oxygen, just as we have to watch whether we are overfishing or overfelling. The realization has dawned that the earth is a spaceship with strictly limited resources. These resources must, in the long run, be recycled, either by nature or by man. Just as the astronaut's urine is purified to provide drinking water and just as his expired air is regenerated to be breathed anew, so all the earth's resources must be recycled, sooner or later. Up to now, the slow pace of nature's own recycling has served, coupled with the fact that the "working capital" of already recycled material was large. But the margins are getting smaller and if men, in even larger numbers, are going to require even larger quantities, the pace of recycling will have to be artificially quickened.
All we have is a narrow band of usable atmosphere, no more than seven miles high, a thin crust of land, only one eighth of the surface of which is really suitable for people to live on, and a limited supply of drinkable water, which we continually reuse. And in the earth, we have a capital of fossil fuels and ores, which, we steadily run down billions of times faster than nature, restores it. These resources are tied together in a complex set of transactions. The air helps purify the water, the water irrigates the plants, the plants help to renew the air.
We heedlessly intervene in these transactions. For instance, we cut down the forests, which transpire water and oxygen, we build dams and pipeline which limit the movement of animals, we pave the earth and build reservoirs, altering the water cycle. So far, nature has brushed off these injuries as pinprick. But now we are becoming so strong, so clever and so numerous, that they are beginning to hurt.
Today there has been a change of attitude towards nature. This is shown in ______.
A．the pollution of rivers
B．the overfishing of seas
C．the increase in air pollution e
D．the fostering of forests
Professor Faulkner wanted to find out why healthy farmers in northern Japan appeared to be losing their ability to think and to reason at a relatively early age, and how the process of ageing could be slowed down.
He set about measuring brain volumes of a thousand people of different ages and occupations.
Computer technology enabled him to obtain precise measurements of the volume of the front andside sections of the brain, which relate to intelligence and emotion, and determine the human character.
Contraction of front and side parts--as cells die off--was observed in some subjects in their thirties, but it was still not evident in some sixty-and seventy-year-olds.
Faulkner concluded from his tests that there is a simple way to slow the contraction--using the head.
The findings show that contraction of the brain begins sooner in people in the country than in the towns. Those least at risk, says Faulkner, are lawyers, followed by university professors and doctors. White-collar workers doing routine work are, however, as likely to have shrinking brains as the farm worker, bus driver and shop assistant.
Faulkner's findings show that thinking can prevent the brain from shrinking. Blood must circulate properly in the head to supply the fresh oxygen the brain cells need. "The best way to maintain good blood circulation is through using the brain," he says. "Think hard and engage in conversstion, Don't rely on pocket calculators."
Professor Faulkner wanted to find out ______.
A．how people's brains shrink
B．the way of making people live longer
C．the size of certain people's brains
D．why certain people aged sooner than others
CDC's team of “virus hunters” is supported by specialized public health teams both in West Africa and at the CDC Atlanta headquarters. Together, they offer continuous support to save lives and protect people. CDC works closely with a number of U.S. government agencies, national and international partners. CDC's experience of working with Ebola is important to the World Health Organization's growing West Africa Ebola response.
On Sept. 2, 2014, CDC Director, Tom Frieden called for more international partners to join this effort. “The sooner the world comes together to help West Africa, the safer we all will be. We know how to stop this outbreak. There is a window of opportunity to do so the challenge is to scale up the massive response needed to stop this outbreak.”
CDC's response to Ebola is the largest international outbreak response in CDC's history with over 100 disease specialists on the ground in West Africa, supported by hundreds of public health emergency response experts stateside , activated at Level 1, its highest level, because of the significance of this outbreak.
The CDC supports affected countries to establish Emergency Operations Centers at national and local levels and helps countries track the epidemic including using real-time data to improve real-time response.
Efforts in West Africa to identify those infected and track people who have come into contact with them are improving. The CDC is operating and supporting labs in the region to improve diagnosis and testing samples from people with suspected Ebola from around the world. Local health care systems are strengthened through communication, coordination with partners and training on infection control for health care workers and safe patient treatment.
26. The 2014 Ebola out bread ask is the first one in western countries.()
27. The headquarters of CDC is in Atlanta.()
28. CDC works closely with some US government agencies, national and international partners in response to the large Ebola outbreak.()
29. There were less than 100 disease specialists from CDC in West Africa for the Ebola response.()
30.CDC is operating and supporting labs in the region to test samples from people with suspected Ebola in West Africa.()
Why should this be？ From the complexity of causes responsible for the present commonplace interview form, a few are worth singling out, such as the revolt against rationality and the worship of feeling in its place. To the young of the 60s, the painstaking search for understanding of a given political problem may have appeared less fruitful and satisfying than the free expression of emotion which the same problem generated. Sooner or later, broadcasting was bound to reflect this.
This bias against understanding has continued. To this we must add the professional causes that have played their part. The convention of the broadcast interview had undergone little change or radical development since its rise in the 50s. When a broadcasting form. ceases to develop, its practitioners tend to take it for granted and are likely to say "how" rather than ask "why".
Furthermore, these partly psychological, partly professional tendencies were greatly accelerated by the huge expansion of news and current affairs output over the last 15 years. When you had many, additional hours of current affairs broadcasting, interviewing turned out to be a far cheaper convention than straight reporting, which is costly in terms of permanent reporters and time preparation. The temptation to combine an expanded news and current affairs service with a relatively small additional financial expense by making the interview happen everywhere proved overwhelming.
To be fair, there are compensating virtues in interviewing, such as immediacy and authority, yet in all honesty I must say that the spread of the interviewing arrangement has led to a corresponding diminution of quality broadcasting.
According to the author, in the past politicians thought that television interviewers ______.
A．knew more about politics than they did
B．should be honoured to meet them
C．really were eager to be politicians too
D．gave them a difficult time in interviews
Professor Taiju Matsuzawa wanted to find out why otherwise healthy farmers in northern Japan appeared to be losing their ability to think and reason at a relatively early age, and how the process of ageing could be slowed down.
With a team a colleague (同事) at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages and varying occupations.
" Computer technology enabled the researchers to obtain precise (精确的) measurements of the volume of the front and side sections of the brain, which relate to intellect (智能) and emotion, and determine the human character. " The rear section of the brain, which controls functions like eating and breathing, does not contract with age, and one can continue living without intellectual or emotional facilities.
Contraction of front and side parts—as cells die off—was observed in some subjects in their thirties, but it was still not evident in some sixty- and seventy-year-olds.
Matsuzawa concluded from his tests that there is a simple remedy to the contraction normally associated with age—using the head.
The findings show in general terms that contraction of the brain begins sooner in people in the country than in the towns. Those least at risk, says Matsuzawa, are lawyers, followed by university professors and doctors. White collar workers doing routine work in government offices are, however, as likely to have shrinking brains as the farm workers, bus drivers and shop assistants.
Matsuzawa's findings show that thinking can prevent the brain from shrinking. Blood must circulate properly in the head to supply the fresh oxygen the brain cells need. "The best way to maintain good blood circulation is through using the brain, " he says, "Think hard and engage in conversation. Don't rely on pocket calculators.
The team of doctors wanted to find out______.
A．how to make people live longer
B．the size of certain people's brains
C．which people are most intelligent
D．why certain people age sooner than others
