创建自己的小题库
搜索
【单选题】
That Africa and South America were once joined can be deduced from the fact that （）
A．the two continents are still moving in opposite directions
B．they have been found to share certain geological features
C．the African plates has been stable, for 30 million years
D．over 100 hot spots are scattered all around the globe
A.
Text 4
B.
Scattered around the globe are more than 100 small regions of isolated volcanic activity known to geologists as hot spots. Unlike most of the world’ s volcanoes, they are not always found at the boundaries of the great drifting plates that make up the earth’ s suce; on the contrary, many of them lie deep in the interior of a plate. Most of the hot spots move only slowly, and in some cases the movement of the plates past them has left trails of dead volcanoes. The hot spots and their volcanic trails are milestones that mark the passage of the plates.
C.
That the plates are moving is not beyond dispute. Africa and South America, for example, are moving away from earth other as new material is injected into the sea floor between them. The complementary coastlines and certain geological features that seem to span the ocean are reminders of where the two continents were once joined. The relative motion of the plates carrying these continents has been constructed in detail, but the motion of one plate with respect to another cannot readily be translated into motion with respect to the earth’ s interior. It is not possible to determine whether both continents are moving in opposite directions or whether one continent is stationary and the other is drifting away from it. Hot spots, anchored in the deeper layers of the earth, provide the measuring instruments needed to resolve the question. From an ysis of the hot spot population it appears that the African plate is stationary and that it has not moved during the past 30 million years.
D.
The significance of hot spots is not confined to their role as a frame of reference. It now appears that they also have an important influence on the geophysical processes that propel the plates across the globe. When a continental plate comes to rest over a hot spot, the material rising from deeper layer creates a broad dome. As the dome grows, it develops seed fissures(cracks); in at least a few cases the continent may break entirely along some of these fissures, so that the hot spot initiates the formation of a new ocean. Thus just as earlier theories have explained the mobility of the continents, so hot spots may explain their mutability(inconstancy).
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈
收藏
举报参考答案：
举一反三
【单选题】The author raises the question "what about pain without gain. because（） A．he questions the truth of "no gain without pain" B．he does not think the productivity revolution works C．he wonders if the off...
A.
Text 2
B.
Well, no gain without pain, they say. But what about pain without gain.’ Everywhere you go in America, you hear tales of corporate revival. What is harder to establish is whether the productivity revolution that businessmen assume they are presiding over is for real.
C.
The official statistics are mildly discouraging. They show that, .if you lump manufacturing and services together, productivity has grown on average by 1.2% since 1987. That is somewhat faster than the average during the previous decade. And since 1991, productivity has in creased by about 2% a year, which are more than twice the 1978 - 1987 averages. The trouble is that part of the recent acceleration is due to the usual rebound that occurs at the point in a business cycle, and so is not conclusive evidence of a revival in the underlying trend. There is, as Robert Rubin, the treasury secretary, says, a "disjunction" between the mass of business anecdote that points to a leap in productivity and the picture reflected by the statistics.
D.
Some of this can be easily explained. New ways of organizing the workplace all that reengineering and downsizing--are only one contribution to the overall productivity of an economy, Which is driven by many other factors such as joint investment in equipment and machinery, new technology, and investment in education and training. Moreover, most of the changes that companies make are intended to keep them profitable, and this need not always mean increasing productivity: switching to new markets or improving quality can matter just as much.
E.
Two other explanations are more speculative. First, some of the business restructuring of recent years may have been ineptly done. Second, even if it wag well done, it may have spread much less widely than people suppose.
F.
Leonard Schlesinger, a Harvard academic and former chief executive of Au Bong Pain, a rapidly growing chain of bakery cafes, says that much "reengineering" has been crude. In many cases, he believes, the loss of revenue has been greater than the reductions in cost. His colleague, Michael Beer, says that far too many companies have applied reengineering in a mechanistic fashion, chopping out costs without giving sufficient thought to long - term profitability. B. B. D. O’ s A1 Rosen shine is blunter. He dismisses a lot of the work of re engineering consultants as mere rubbish--" the worst sort of ambulance cashing."
【单选题】Henry cannot resist the lure of drugs.
A.
abuse
B.
flavor
C.
temptation
D.
consumption
【单选题】Which of the following statements is NOT mentioned in the passage（） A．Radical reforms are essential for the increase of productivity. B．New ways of organizing workplaces may help to increase productiv...
A.
Text 2
B.
Well, no gain without pain, they say. But what about pain without gain.’ Everywhere you go in America, you hear tales of corporate revival. What is harder to establish is whether the productivity revolution that businessmen assume they are presiding over is for real.
C.
The official statistics are mildly discouraging. They show that, .if you lump manufacturing and services together, productivity has grown on average by 1.2% since 1987. That is somewhat faster than the average during the previous decade. And since 1991, productivity has in creased by about 2% a year, which are more than twice the 1978 - 1987 averages. The trouble is that part of the recent acceleration is due to the usual rebound that occurs at the point in a business cycle, and so is not conclusive evidence of a revival in the underlying trend. There is, as Robert Rubin, the treasury secretary, says, a "disjunction" between the mass of business anecdote that points to a leap in productivity and the picture reflected by the statistics.
D.
Some of this can be easily explained. New ways of organizing the workplace all that reengineering and downsizing--are only one contribution to the overall productivity of an economy, Which is driven by many other factors such as joint investment in equipment and machinery, new technology, and investment in education and training. Moreover, most of the changes that companies make are intended to keep them profitable, and this need not always mean increasing productivity: switching to new markets or improving quality can matter just as much.
E.
Two other explanations are more speculative. First, some of the business restructuring of recent years may have been ineptly done. Second, even if it wag well done, it may have spread much less widely than people suppose.
F.
Leonard Schlesinger, a Harvard academic and former chief executive of Au Bong Pain, a rapidly growing chain of bakery cafes, says that much "reengineering" has been crude. In many cases, he believes, the loss of revenue has been greater than the reductions in cost. His colleague, Michael Beer, says that far too many companies have applied reengineering in a mechanistic fashion, chopping out costs without giving sufficient thought to long - term profitability. B. B. D. O’ s A1 Rosen shine is blunter. He dismisses a lot of the work of re engineering consultants as mere rubbish--" the worst sort of ambulance cashing."
【单选题】Paragraphs 2 and 3 are written to（） A．discuss the cause of the decline of science's power B．show the author' s sympathy with scientists C．explain the way in which science develops D．exemplify the divi...
A.
Text 3
B.
Science has long had an uneasy relationship with other aspects of culture. Think of Galileo’ s 17th century trial for his rebelling belief before the Catholic Church or poet William Blake’ s harsh remarks against the mechanistic worldview of Isaac Newton. The schism between sciences and the humanities has, if anything, deepened in this century.
C.
Until recently, the scientific community was so powerful that it could effort to ignore its critics--but no longer. As funding for science has declined, scientists have attacked "antiscience" in several books, notably Higher Superstition, by Paul Regress, a biologist at the University of Virginia, and Norman Leavitt, a mathematician at Rutgers University; and The Demon Haunted World, by Car Satan of Cornell University.
D.
Defenders of science have also voiced their concerns at meetings such as "The Flight from Science and Reason", held in New York City in 1995, and "Science in the Age of (Miss)information," which assembled last June near Buffalo.
E.
Antiscience clearly means different things to different people. Gross and Leavitt find fault primarily with sociologists, philosophers and other academics, that have questioned science’ s objectivity. Saga is more concerned with those who believe in ghosts, creationism and other phenomena that contradict the scientific worldview.
F.
A survey of news stories in 1996 reveals that the antiscience tag has been attached to many other groups as well, from authorities who advocated the elimination of the last remaining stocks of smallpox virus to Republicans who advocated decreased funding for basic research.
G.
Few would dispute that the term applies to the Unabomber, those manifesto, published in 1995, scorns science and longs for return to a pre - technological utopia. But surely that does not mean environmentalists concerned about uncontrolled industrial growth are antiscience, as an essay in US News & World Report last May seemed to suggest.
H.
The environmentalists, inevitably, respond to such critics. The true enemies of science, argues Paul Ehrlich of Stanford University, a pioneer of environmental studies, are those who question the evidence supporting global warming, the depletion of the ozone layer, and other consequences of industrial growth.
I.
Indeed, some observers fear that the antiscience epithet is in danger of becoming meaningless. "The term ’ antiscience can lump together too many, quite different things," notes Harvard University philosopher Gerald Holton in his 1993 work Science and Anti-Science.
J.
"They have in common only one thing that they tend to annoy or threaten those who regard themselves as more enlightened."
【单选题】Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. (10 points)5（） A．pull B．size C．gravity D．number
A.
Air is (1) , and like all matter, it has weight. Weight is the measure of the (2) of gravity (3) matter. If a scale registers 10 kilograms when a stone is placed on it, this means that gravity pulls the stone with that (4) force. (5) , earth’ s gravity pulls on each (6) of gas and dust on the atmosphere. Because our atmosphere is a. vast (7) of air, it has (8) . If it could (9) be compressed and put on a (10) of scales, it would weigh about 5,700,000,000,000,000 (quadrillion) metric tons.
B.
The air pressed down on us and against us (11) all sides. Something (12) a ton of air is pressing against you at this moment. You are not (13) of this because air pressure within your body (14) the pressure of the air outside.
C.
Air pressure is 1. 036 kilograms per square centimeter (14.7 pounds per square inch) at sea (15) . It is greatest there because that is the (16) of the atmosphere. (17) higher altitudes the pressure is (18) . That is why the (19) of highflying planes are pressurized. They are designed to (20) the air pressure our bodies must have.
【单选题】The man over there is () teacher.
A.
Peter and John
B.
Peter and John's
C.
Peter's and John's
D.
Peter's and John
相关题目：
【单选题】The author raises the question "what about pain without gain. because（） A．he questions the truth of "no gain without pain" B．he does not think the productivity revolution works C．he wonders if the off...
A.
Text 2
B.
Well, no gain without pain, they say. But what about pain without gain.’ Everywhere you go in America, you hear tales of corporate revival. What is harder to establish is whether the productivity revolution that businessmen assume they are presiding over is for real.
C.
The official statistics are mildly discouraging. They show that, .if you lump manufacturing and services together, productivity has grown on average by 1.2% since 1987. That is somewhat faster than the average during the previous decade. And since 1991, productivity has in creased by about 2% a year, which are more than twice the 1978 - 1987 averages. The trouble is that part of the recent acceleration is due to the usual rebound that occurs at the point in a business cycle, and so is not conclusive evidence of a revival in the underlying trend. There is, as Robert Rubin, the treasury secretary, says, a "disjunction" between the mass of business anecdote that points to a leap in productivity and the picture reflected by the statistics.
D.
Some of this can be easily explained. New ways of organizing the workplace all that reengineering and downsizing--are only one contribution to the overall productivity of an economy, Which is driven by many other factors such as joint investment in equipment and machinery, new technology, and investment in education and training. Moreover, most of the changes that companies make are intended to keep them profitable, and this need not always mean increasing productivity: switching to new markets or improving quality can matter just as much.
E.
Two other explanations are more speculative. First, some of the business restructuring of recent years may have been ineptly done. Second, even if it wag well done, it may have spread much less widely than people suppose.
F.
Leonard Schlesinger, a Harvard academic and former chief executive of Au Bong Pain, a rapidly growing chain of bakery cafes, says that much "reengineering" has been crude. In many cases, he believes, the loss of revenue has been greater than the reductions in cost. His colleague, Michael Beer, says that far too many companies have applied reengineering in a mechanistic fashion, chopping out costs without giving sufficient thought to long - term profitability. B. B. D. O’ s A1 Rosen shine is blunter. He dismisses a lot of the work of re engineering consultants as mere rubbish--" the worst sort of ambulance cashing."
【单选题】Henry cannot resist the lure of drugs.
A.
abuse
B.
flavor
C.
temptation
D.
consumption
【单选题】Which of the following statements is NOT mentioned in the passage（） A．Radical reforms are essential for the increase of productivity. B．New ways of organizing workplaces may help to increase productiv...
A.
Text 2
B.
Well, no gain without pain, they say. But what about pain without gain.’ Everywhere you go in America, you hear tales of corporate revival. What is harder to establish is whether the productivity revolution that businessmen assume they are presiding over is for real.
C.
The official statistics are mildly discouraging. They show that, .if you lump manufacturing and services together, productivity has grown on average by 1.2% since 1987. That is somewhat faster than the average during the previous decade. And since 1991, productivity has in creased by about 2% a year, which are more than twice the 1978 - 1987 averages. The trouble is that part of the recent acceleration is due to the usual rebound that occurs at the point in a business cycle, and so is not conclusive evidence of a revival in the underlying trend. There is, as Robert Rubin, the treasury secretary, says, a "disjunction" between the mass of business anecdote that points to a leap in productivity and the picture reflected by the statistics.
D.
Some of this can be easily explained. New ways of organizing the workplace all that reengineering and downsizing--are only one contribution to the overall productivity of an economy, Which is driven by many other factors such as joint investment in equipment and machinery, new technology, and investment in education and training. Moreover, most of the changes that companies make are intended to keep them profitable, and this need not always mean increasing productivity: switching to new markets or improving quality can matter just as much.
E.
Two other explanations are more speculative. First, some of the business restructuring of recent years may have been ineptly done. Second, even if it wag well done, it may have spread much less widely than people suppose.
F.
Leonard Schlesinger, a Harvard academic and former chief executive of Au Bong Pain, a rapidly growing chain of bakery cafes, says that much "reengineering" has been crude. In many cases, he believes, the loss of revenue has been greater than the reductions in cost. His colleague, Michael Beer, says that far too many companies have applied reengineering in a mechanistic fashion, chopping out costs without giving sufficient thought to long - term profitability. B. B. D. O’ s A1 Rosen shine is blunter. He dismisses a lot of the work of re engineering consultants as mere rubbish--" the worst sort of ambulance cashing."
【单选题】Paragraphs 2 and 3 are written to（） A．discuss the cause of the decline of science's power B．show the author' s sympathy with scientists C．explain the way in which science develops D．exemplify the divi...
A.
Text 3
B.
Science has long had an uneasy relationship with other aspects of culture. Think of Galileo’ s 17th century trial for his rebelling belief before the Catholic Church or poet William Blake’ s harsh remarks against the mechanistic worldview of Isaac Newton. The schism between sciences and the humanities has, if anything, deepened in this century.
C.
Until recently, the scientific community was so powerful that it could effort to ignore its critics--but no longer. As funding for science has declined, scientists have attacked "antiscience" in several books, notably Higher Superstition, by Paul Regress, a biologist at the University of Virginia, and Norman Leavitt, a mathematician at Rutgers University; and The Demon Haunted World, by Car Satan of Cornell University.
D.
Defenders of science have also voiced their concerns at meetings such as "The Flight from Science and Reason", held in New York City in 1995, and "Science in the Age of (Miss)information," which assembled last June near Buffalo.
E.
Antiscience clearly means different things to different people. Gross and Leavitt find fault primarily with sociologists, philosophers and other academics, that have questioned science’ s objectivity. Saga is more concerned with those who believe in ghosts, creationism and other phenomena that contradict the scientific worldview.
F.
A survey of news stories in 1996 reveals that the antiscience tag has been attached to many other groups as well, from authorities who advocated the elimination of the last remaining stocks of smallpox virus to Republicans who advocated decreased funding for basic research.
G.
Few would dispute that the term applies to the Unabomber, those manifesto, published in 1995, scorns science and longs for return to a pre - technological utopia. But surely that does not mean environmentalists concerned about uncontrolled industrial growth are antiscience, as an essay in US News & World Report last May seemed to suggest.
H.
The environmentalists, inevitably, respond to such critics. The true enemies of science, argues Paul Ehrlich of Stanford University, a pioneer of environmental studies, are those who question the evidence supporting global warming, the depletion of the ozone layer, and other consequences of industrial growth.
I.
Indeed, some observers fear that the antiscience epithet is in danger of becoming meaningless. "The term ’ antiscience can lump together too many, quite different things," notes Harvard University philosopher Gerald Holton in his 1993 work Science and Anti-Science.
J.
"They have in common only one thing that they tend to annoy or threaten those who regard themselves as more enlightened."
【单选题】Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. (10 points)5（） A．pull B．size C．gravity D．number
A.
Air is (1) , and like all matter, it has weight. Weight is the measure of the (2) of gravity (3) matter. If a scale registers 10 kilograms when a stone is placed on it, this means that gravity pulls the stone with that (4) force. (5) , earth’ s gravity pulls on each (6) of gas and dust on the atmosphere. Because our atmosphere is a. vast (7) of air, it has (8) . If it could (9) be compressed and put on a (10) of scales, it would weigh about 5,700,000,000,000,000 (quadrillion) metric tons.
B.
The air pressed down on us and against us (11) all sides. Something (12) a ton of air is pressing against you at this moment. You are not (13) of this because air pressure within your body (14) the pressure of the air outside.
C.
Air pressure is 1. 036 kilograms per square centimeter (14.7 pounds per square inch) at sea (15) . It is greatest there because that is the (16) of the atmosphere. (17) higher altitudes the pressure is (18) . That is why the (19) of highflying planes are pressurized. They are designed to (20) the air pressure our bodies must have.
【单选题】The man over there is () teacher.
A.
Peter and John
B.
Peter and John's
C.
Peter's and John's
D.
Peter's and John
参考解析：
AI解析
重新生成
题目纠错 0
发布
