题目内容
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Our scientific findings cannot be regarded as ______ in such a short period of time.
A．to have been obtained
B．to be obtained
C．having been obtained
D．being obtained
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更多“Our scientific findings cannot…”相关的问题
In education, there should be a good balance among the branches of knowledge that contribute to effective thinking and wise judgment. Such balance is defeated by too much emphasis on any one field. This question of balance involves not only the relation of the natural sciences, the social sciences, and the arts but also relative emphases among the natural sciences themselves.
Similarly, we must have a balance between current and classical knowledge. The attention of the public is continually drawn to new possibilities in scientific fields and the discovery of new knowledge; these should not be allowed to mm our attention away from the sound, established materials that form. the basis of courses for beginners.
According to the first paragraph, the task of education is fairly complicated because ______.
A．the current public school system is too complicated to be understood
B．the public school system has no choice of what to teach
C．it is difficult to decide whether elementary science should be taught in public schools
D．the educators have to take care of both ordinary and gifted students
Passage Three
Questions 31 to 35 are based on the following passage.
The physicist investigating the relationship between time and space, the chemist exploring the properties of a new substance, the biologist probing the mysteries of the continuity of life. and the anthropologist(人类学家)searching for human origins share a common trait(特征), curiosity. Not that nonscientist are not curious；most people possess this characteristic. The scientist, however, uses a specific method to make researches into these enigmatic(难以理解的)problems-the scientific method.
Unfortunately, science and its method are misunderstood, the multiplication of our knowledge in medicine and technology has led to the idea that science can cure all and explain all and that only enough time, money and intelligence are needed. In truth. science cannot provide all answers. In fact, many phenomena are not even subject to scientific explanations.
On the other side of the coin, science has been attacked as a cause of most contemporary problems. It is said to be responsible for the depersonalization(使失去个性)of the individual, for stripping(夺去)creativity from human behavior, and for creating massive threats to the species through the development of nuclear power, insecticides, and polluting machinery. If we analyze the situation, we can see that it was not the original intent of the people who developed computers to debase humankind, nor was mass production proposed as a method to crush creativity. It is what society, policymakers especially, does with scientific achievements that makes them social or antisocial. There is nothing inherently good or bad about science.
Which of the following is the main topic of the passage？
A. Scientists and their curiosity.
B. Science and scientific method.
C. Understandings of science.
D. Misunderstandings of science.
根据以下内容回答题：
It is Dredicted that there will be four scientific breakthroughs in the 21 st centruy． We wiuknow where we came from．Since the l920s，scientists have known the universe is expanding，which means it must have started at a definite time in the past．They even have de-veloped theories that give a detailed picture of the universe from the time it was a fraction of a second old to the present．Over the next couple of decades，these theories will be improved by data from powerful new telescopes． We will find out the genetic code and conquer cancer．In l9th century operas，when the heroine coughs in the first act，the audience knows"she will die of tuberculosis in the third act．
But thanks to 20th century science，the once deadly disease now means nothing more serious than taking some pills．As scientists learn more about the genetic code and the way cells work，many serious desease——cancer．will become less threatening． We will live longer，probably up to 1 20 years．If the normal aging process is basically a fierce．invisible contest in our ceus——a contest between damage to our DNA and our ceils’abili-ty to repair that damage，gre{at progress around．But before we push scientists to do more，we should consider：do we really want to live in a world where no one grows old？We will haye a hrain road map．This is the real final frontier of the 21 st century．The brain is the most complex system we know．It contains about l00 billion nerve cells，each con-nected to as many as l000 0thers．Early in the 21 st century，progress in science will make it Dossible to produce detailed images of the nerve cells in operation．We will be able to say with certainty which ones are working when you read or think about a word．
Jadging from the second paragraph，the writer thinks of present theories about the uinverse as __________．
A.perfect
B.imperfect
C.groundless
D.complicated
In 274 pages Sagan deals with everything from the formation of the Earth to the puzzling possibilities of contact with extra-terrestrial life. This is the moment in history when man's stepping into the universe has suddenly become conceivable. To Sagan this is more exciting and important than was the exploration of the New World in the sixteenth century. So expenditure on the space programme, pruned of recent excesses, ought to continue--it is, according to Sagan, no larger a part of America's gross national income than was the relative cost to England in the sixteenth century of exploration in sailing ships.
The book is not for scientific illiterates, nor is Sagan a pedestrian scientist. Although he makes short work of the unidentified foreign objects (UFO) spotters, he is unafraid to take us on a speculative journey to a black hole which, for all he knows, might be the quick route to somewhere else, not necessarily our universe.
Sagan exhibits a passionate interest in life in the cosmos in which there are .almost certainly civilizations much more advanced than our own. We are the result of a number of relatively recent cosmic accidents, but for all that, Sagan is no less excited about our future,
From the passage we understand that Carl Sagan writes ______.
A．forcefully and complexly
B．elaborately and literally
C．simply and humorously
D．snobbishly and cleverly
Researchers from the London School of Hygiene & Tropical Medicine said consumers were paying higher prices for organic food because of its imagined health benefits, creating a global organic market worth an estimated $48 billion in 2007.
A systematic review of 162 scientific papers published in the scientific literature over the last 50 years, however, found there was no significant difference.
"A small number of differences in nutrient content were found to exist between organically and conventionally (通常) produced foodstuffs, but these have nothing to do with public health, " said Alan Dangour, one of the report's authors.
"Our review indicates that there is currently no evidence to support the selection of organically over conventionally produced foods on the basis of nutritional superiority . "
The results of research, which was commissioned by the British government's Food Standards Agency, were published in the American Journal of Clinical Nutrition.
Sales of organic food have fallen in some markets, including Britain, as a slowdown in economic growth has led consumers to cut back on purchases.
The Soil Association said that growth in sales of organic products in Britain slowed to just 1.7percent, well below the average annual growth rate of 26 percent over the last decade.
Why does organic food cost more than conventionally produced food？
A．Because people think they are much healthier.
B．Because they are more delicious.
C．Because people prefer organic food.
D．Because they sell better.
According to the passage, visitors from space may have landed on the earth ______.
A．long before man had dreamed of it
B．long before there were human beings
C．in the last few hundred years
D．after the space age began
What is the main topic of the passage？ ()
A．The need for agricultural advances to help feed a growing population.
B．The development of safer machines demanded by the labor movement.
C．Machinery that contributed to the agricultural revolution.
D．New Jersey as a leader in the agricultural revolution.
Before World War I we spent our summer holidays in Hungary. I have only the dim memory of the house we lived in, of my room and my toys. Nor do I recall clearly the large family of grandparents, aunts, uncles and cousins who gathered next door. But I do have a crystalclear memory of the dogs, the farm animals, the local birds, and above all, the insects.
I am a naturalist, not a scientist. I have a strong love of the natural world and my enthusiasm had led me into varied investigations. I love discussing my favorite topics and enjoy burning the midnight oil while reading about other people's observations and discoveries. Then something happens that brings these observations together in my conscious mind. Suddenly you fancy you see the answer to the riddle, because it all seems to fit together. This has resulted in my publishing 300 papers, and books, which some might honour with the title of scientific research.
But curiosity, a keen eye, a good memory and enjoyment of the animal and plant world do not make a scientist: one the outstanding and essential qualities required is se]f-discipline, a quality I lack. A scientist requires not only self-discipline but hard training, determination and a goal. A scientist, up to a point, can be made. A naturalist is born. If you can combine the two, you get the best of both worlds.
The first paragraph tells us the author ______. ()
A．was interested in flowers and insects in his childhood
B．lost his hearing when he was a child
C．didn't like his brothers and sisters
D．was born to a naturalist's family
According to the passage, "scientific subculture "means ______.
A．cultural groups that are formed by scientists
B．people whose knowledge of science is very limited
C．the scientific community
D．people who make good contribution to science
