【A1】A.THE DISASTROUS IMPACT ON BIODIVERSITY. B.HUMAN POPULATION GROWTH WORSENS THE PROBLE - 试题答案网问答

第1题

【A5】A.THE DISASTROUS IMPACT ON BIODIVERSITY. B.HUMAN POPULATION GROWTH WORSENS THE PROBLE

【A5】

A.THE DISASTROUS IMPACT ON BIODIVERSITY.

B.HUMAN POPULATION GROWTH WORSENS THE PROBLE

M.

C.WHAT IS LAND CONVERSION？

D.PROTECTED AREAS ARE UNDER THREAT.

E.THE LAND-CONVERSION CASCAD

E. BEHIND THE PROJECTIONS OF SPECIES LOSS LURK A NUMBER OF CRUCIAL BUT HARD-TO-PLOT VARIABLES, AMONG WHICH TWO ARE ESPECIALLY WEIGHTY; CONTINUING LANDSCAPE CONVERSION AND THE GROWTH CURVE OF HUMAN POPULATIO

N. 【A1】______ LANDSCAPE CONVERSION CAN MEAN MANY THINGS:DRAINING WETLANDS TO BUILD ROADS AND AIRPORTS, TURNING TALLGRASS (高秆草) PRAIRIES UNDER THE PLOW, FENCING SAVANNA (热带大草原) AND OVERGRAZING IT WITH DOMESTIC STOCK, CUTTING SECOND-GROWTH FOREST VERMONT AND CONSIGNING THE LAND TO SKI RESORTS OR VACATION SUBURBS, SLASH-AND-BURN CLEARING OF MADAGASCAR"S (马达加斯加) RAIN FOREST TO GROW RICE ON WET HILLSIDES, INDUSTRIAL LOGGING IN BORNEO (婆罗洲) TO MEET JAPANESE PLYWOOD DEMANDS. 【A2】______ THE ECOLOGIST JOHN TERBORGH AND A COLLEAGUE CAREL P.VAN SCHAIK, HAVE DESCRIBED A FOUR-STAGE PROCESS OF LANDSCAPE CONVERSION THAT THEY CALL THE LAND-USE CASCAD

E.THE SUCCESSIVE STAGES ARE (1)WILDLANDS, ENCOMPASSING NATIVE FLORAL AND FAUNAL COMMUNITIES ALTERED LITTLE OR NOT AT ALL BY HUMAN IMPACT; (2)EXTENSIVELY USED AREAS, SUCH AS NATURAL GRASSLANDS LIGHTLY GRAZED, SAVANNA KEPT OPEN FOR PREY ANIMALS BY INFREQUENT HUMAN-SET FIRES, OR FORESTS SPARSELY WORKED BY SLASH-AND-BURN FARMERS AT LOW DENSITY; (3)INTENSIVELY USED AREAS, MEANING CROP FIELDS, PLANTATIONS, VILLAGE COMMONS, TRAVEL CORRIDORS, URBAN AND INDUSTRIAL ZONES; AND FINALLY(4)DEGRADED LAND, FORMERLY USEFUL BUT NOW ABUSED BEYOND VALUE TO ANYBODY. 【A3】______ AMONG ALL FORMS OF LANDSCAPE CONVERSION, PUSHING TROPICAL FOREST FROM THE WILDLANDS CATEGORY TO THE INTENSIVELY USED CATEGORY HAS THE GREATEST IMPACT ON BIOLOGICAL DIVERSITY.YOU CAN SEE IT IN THE CENTRAL AMAZON, WHERE BIG TRACTS OF RAIN FOREST HAVE BEEN FELLED AND BURNED, IN A LARGELY FUTILE ATTEMPT TO PASTURE CATTLE ON SUN- HARDENED CLAY.BY THE MIDDLE OF THE NEXT CENTURY, IF TREND CONTINUE, TROPICAL FOREST WILL EXIST VIRTUALLY NOWHERE OUTSIDE OF PROTECTED AREAS—THAT IS, NATIONAL PARKS, WILDLIFE REFUGES, AND OTHER OFFICIAL RESERVES. 【A4】______ HUMAN POPULATION GROWTH WILL MAKE A BAD SITUATION WORSE BY PUTTING EVER MORE PRESSURE ON ALL AVAILABLE LAN

D.THE ANNUAL INCREASE IS NOW 80 MILLION PEOPLE, WITH MOST OF THAT INCREMENT COMING IN LESS DEVELOPED COUNTRIES.ACCORDING TO THE UN"S MIDDLE ESTIMATE, HUMAN POPULATION WILL RISE FROM THE PRESENT 5.9 BILLION TO 9.4 BILLION BY THE YEAR 2050, THEN TO 10.8 BILLION BY 2150, BEFORE LEVELING OFF THERE AT THE END OF THE TWENTY-SECOND CENTURY.ANYONE INTERESTED IN THE FUTURE OF BIOLOGICAL DIVERSITY NEEDS TO THINK ABOUT THE PRESSURES THESE PEOPLE WILL FACE, AND THE PRESSURES THEY WILL EXERT IN RETUR

N. 【A5】______ THAT DIRECTION, NECESSARILY, WILL BE TOWARD EVER MORE DESPERATE EXPLOITATION OF LANDSCAP

E.EVEN NOAH"S ARK ONLY MANAGES TO RESCUE PAIRED ANIMALS, NOT LARGE PARCELS OF HABITAT.THE JEOPARDY OF THE ECOLOGICAL FRAGMENTS THAT WE PRESENTLY CHERISH AS PARKS, REFUGES, AND RESERVES IS ALREADY SEVERE, DUE TO INTERNAL AND EXTERNAL FORCES: INTERNAL, BECAUSE INSULARITY ITSELF LEADS TO ECOLOGICAL UNRAVELING; AND EXTERNAL, BECAUSE THOSE AREAS ARE STILL UNDER SIEGE BY NEEDY AND COVETOUS PEOPL

E.WE SHOULDN"T TAKE COMFORT IN ASSUMING THAT AT LEAST YELLOWSTONE NATIONAL PARK WILL STILL HARBOR BEARS IN THE YEAR 2150, THAT AT LEAST ROYAL CHIT-WAN IN NEPAL WILL STILL HARBOR TIGERS AND GIR IN INDIA WILL STILL HARBOR LIONS.THOSE PREDATOR POPULATIONS, AND OTHER SPECIES DOWN THE CASCADE, ARE LIKELY TO DISAPPEAR."WILDNESS" WILL BE A WORD APPLICABLE ONLY TO URBAN TURMOIL.LIONS, TIGERS, AND BEARS WILL EXIST IN ZOOS.NATURE WON"T COME TO AN END, BUT IT WILL LOOK VERY DIFFERENT.

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第2题

【A2】A.THE DISASTROUS IMPACT ON BIODIVERSITY. B.HUMAN POPULATION GROWTH WORSENS THE PROBLE

【A2】

A.THE DISASTROUS IMPACT ON BIODIVERSITY.

B.HUMAN POPULATION GROWTH WORSENS THE PROBLE

M.

C.WHAT IS LAND CONVERSION？

D.PROTECTED AREAS ARE UNDER THREAT.

E.THE LAND-CONVERSION CASCAD

E. BEHIND THE PROJECTIONS OF SPECIES LOSS LURK A NUMBER OF CRUCIAL BUT HARD-TO-PLOT VARIABLES, AMONG WHICH TWO ARE ESPECIALLY WEIGHTY; CONTINUING LANDSCAPE CONVERSION AND THE GROWTH CURVE OF HUMAN POPULATIO

N. 【A1】______ LANDSCAPE CONVERSION CAN MEAN MANY THINGS:DRAINING WETLANDS TO BUILD ROADS AND AIRPORTS, TURNING TALLGRASS (高秆草) PRAIRIES UNDER THE PLOW, FENCING SAVANNA (热带大草原) AND OVERGRAZING IT WITH DOMESTIC STOCK, CUTTING SECOND-GROWTH FOREST VERMONT AND CONSIGNING THE LAND TO SKI RESORTS OR VACATION SUBURBS, SLASH-AND-BURN CLEARING OF MADAGASCAR"S (马达加斯加) RAIN FOREST TO GROW RICE ON WET HILLSIDES, INDUSTRIAL LOGGING IN BORNEO (婆罗洲) TO MEET JAPANESE PLYWOOD DEMANDS. 【A2】______ THE ECOLOGIST JOHN TERBORGH AND A COLLEAGUE CAREL P.VAN SCHAIK, HAVE DESCRIBED A FOUR-STAGE PROCESS OF LANDSCAPE CONVERSION THAT THEY CALL THE LAND-USE CASCAD

E.THE SUCCESSIVE STAGES ARE (1)WILDLANDS, ENCOMPASSING NATIVE FLORAL AND FAUNAL COMMUNITIES ALTERED LITTLE OR NOT AT ALL BY HUMAN IMPACT; (2)EXTENSIVELY USED AREAS, SUCH AS NATURAL GRASSLANDS LIGHTLY GRAZED, SAVANNA KEPT OPEN FOR PREY ANIMALS BY INFREQUENT HUMAN-SET FIRES, OR FORESTS SPARSELY WORKED BY SLASH-AND-BURN FARMERS AT LOW DENSITY; (3)INTENSIVELY USED AREAS, MEANING CROP FIELDS, PLANTATIONS, VILLAGE COMMONS, TRAVEL CORRIDORS, URBAN AND INDUSTRIAL ZONES; AND FINALLY(4)DEGRADED LAND, FORMERLY USEFUL BUT NOW ABUSED BEYOND VALUE TO ANYBODY. 【A3】______ AMONG ALL FORMS OF LANDSCAPE CONVERSION, PUSHING TROPICAL FOREST FROM THE WILDLANDS CATEGORY TO THE INTENSIVELY USED CATEGORY HAS THE GREATEST IMPACT ON BIOLOGICAL DIVERSITY.YOU CAN SEE IT IN THE CENTRAL AMAZON, WHERE BIG TRACTS OF RAIN FOREST HAVE BEEN FELLED AND BURNED, IN A LARGELY FUTILE ATTEMPT TO PASTURE CATTLE ON SUN- HARDENED CLAY.BY THE MIDDLE OF THE NEXT CENTURY, IF TREND CONTINUE, TROPICAL FOREST WILL EXIST VIRTUALLY NOWHERE OUTSIDE OF PROTECTED AREAS—THAT IS, NATIONAL PARKS, WILDLIFE REFUGES, AND OTHER OFFICIAL RESERVES. 【A4】______ HUMAN POPULATION GROWTH WILL MAKE A BAD SITUATION WORSE BY PUTTING EVER MORE PRESSURE ON ALL AVAILABLE LAN

D.THE ANNUAL INCREASE IS NOW 80 MILLION PEOPLE, WITH MOST OF THAT INCREMENT COMING IN LESS DEVELOPED COUNTRIES.ACCORDING TO THE UN"S MIDDLE ESTIMATE, HUMAN POPULATION WILL RISE FROM THE PRESENT 5.9 BILLION TO 9.4 BILLION BY THE YEAR 2050, THEN TO 10.8 BILLION BY 2150, BEFORE LEVELING OFF THERE AT THE END OF THE TWENTY-SECOND CENTURY.ANYONE INTERESTED IN THE FUTURE OF BIOLOGICAL DIVERSITY NEEDS TO THINK ABOUT THE PRESSURES THESE PEOPLE WILL FACE, AND THE PRESSURES THEY WILL EXERT IN RETUR

N. 【A5】______ THAT DIRECTION, NECESSARILY, WILL BE TOWARD EVER MORE DESPERATE EXPLOITATION OF LANDSCAP

E.EVEN NOAH"S ARK ONLY MANAGES TO RESCUE PAIRED ANIMALS, NOT LARGE PARCELS OF HABITAT.THE JEOPARDY OF THE ECOLOGICAL FRAGMENTS THAT WE PRESENTLY CHERISH AS PARKS, REFUGES, AND RESERVES IS ALREADY SEVERE, DUE TO INTERNAL AND EXTERNAL FORCES: INTERNAL, BECAUSE INSULARITY ITSELF LEADS TO ECOLOGICAL UNRAVELING; AND EXTERNAL, BECAUSE THOSE AREAS ARE STILL UNDER SIEGE BY NEEDY AND COVETOUS PEOPL

E.WE SHOULDN"T TAKE COMFORT IN ASSUMING THAT AT LEAST YELLOWSTONE NATIONAL PARK WILL STILL HARBOR BEARS IN THE YEAR 2150, THAT AT LEAST ROYAL CHIT-WAN IN NEPAL WILL STILL HARBOR TIGERS AND GIR IN INDIA WILL STILL HARBOR LIONS.THOSE PREDATOR POPULATIONS, AND OTHER SPECIES DOWN THE CASCADE, ARE LIKELY TO DISAPPEAR."WILDNESS" WILL BE A WORD APPLICABLE ONLY TO URBAN TURMOIL.LIONS, TIGERS, AND BEARS WILL EXIST IN ZOOS.NATURE WON"T COME TO AN END, BUT IT WILL LOOK VERY DIFFERENT.

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第3题

【A3】A.THE DISASTROUS IMPACT ON BIODIVERSITY. B.HUMAN POPULATION GROWTH WORSENS THE PROBLE

【A3】

A.THE DISASTROUS IMPACT ON BIODIVERSITY.

B.HUMAN POPULATION GROWTH WORSENS THE PROBLE

M.

C.WHAT IS LAND CONVERSION？

D.PROTECTED AREAS ARE UNDER THREAT.

E.THE LAND-CONVERSION CASCAD

E. BEHIND THE PROJECTIONS OF SPECIES LOSS LURK A NUMBER OF CRUCIAL BUT HARD-TO-PLOT VARIABLES, AMONG WHICH TWO ARE ESPECIALLY WEIGHTY; CONTINUING LANDSCAPE CONVERSION AND THE GROWTH CURVE OF HUMAN POPULATIO

N. 【A1】______ LANDSCAPE CONVERSION CAN MEAN MANY THINGS:DRAINING WETLANDS TO BUILD ROADS AND AIRPORTS, TURNING TALLGRASS (高秆草) PRAIRIES UNDER THE PLOW, FENCING SAVANNA (热带大草原) AND OVERGRAZING IT WITH DOMESTIC STOCK, CUTTING SECOND-GROWTH FOREST VERMONT AND CONSIGNING THE LAND TO SKI RESORTS OR VACATION SUBURBS, SLASH-AND-BURN CLEARING OF MADAGASCAR"S (马达加斯加) RAIN FOREST TO GROW RICE ON WET HILLSIDES, INDUSTRIAL LOGGING IN BORNEO (婆罗洲) TO MEET JAPANESE PLYWOOD DEMANDS. 【A2】______ THE ECOLOGIST JOHN TERBORGH AND A COLLEAGUE CAREL P.VAN SCHAIK, HAVE DESCRIBED A FOUR-STAGE PROCESS OF LANDSCAPE CONVERSION THAT THEY CALL THE LAND-USE CASCAD

E.THE SUCCESSIVE STAGES ARE (1)WILDLANDS, ENCOMPASSING NATIVE FLORAL AND FAUNAL COMMUNITIES ALTERED LITTLE OR NOT AT ALL BY HUMAN IMPACT; (2)EXTENSIVELY USED AREAS, SUCH AS NATURAL GRASSLANDS LIGHTLY GRAZED, SAVANNA KEPT OPEN FOR PREY ANIMALS BY INFREQUENT HUMAN-SET FIRES, OR FORESTS SPARSELY WORKED BY SLASH-AND-BURN FARMERS AT LOW DENSITY; (3)INTENSIVELY USED AREAS, MEANING CROP FIELDS, PLANTATIONS, VILLAGE COMMONS, TRAVEL CORRIDORS, URBAN AND INDUSTRIAL ZONES; AND FINALLY(4)DEGRADED LAND, FORMERLY USEFUL BUT NOW ABUSED BEYOND VALUE TO ANYBODY. 【A3】______ AMONG ALL FORMS OF LANDSCAPE CONVERSION, PUSHING TROPICAL FOREST FROM THE WILDLANDS CATEGORY TO THE INTENSIVELY USED CATEGORY HAS THE GREATEST IMPACT ON BIOLOGICAL DIVERSITY.YOU CAN SEE IT IN THE CENTRAL AMAZON, WHERE BIG TRACTS OF RAIN FOREST HAVE BEEN FELLED AND BURNED, IN A LARGELY FUTILE ATTEMPT TO PASTURE CATTLE ON SUN- HARDENED CLAY.BY THE MIDDLE OF THE NEXT CENTURY, IF TREND CONTINUE, TROPICAL FOREST WILL EXIST VIRTUALLY NOWHERE OUTSIDE OF PROTECTED AREAS—THAT IS, NATIONAL PARKS, WILDLIFE REFUGES, AND OTHER OFFICIAL RESERVES. 【A4】______ HUMAN POPULATION GROWTH WILL MAKE A BAD SITUATION WORSE BY PUTTING EVER MORE PRESSURE ON ALL AVAILABLE LAN

D.THE ANNUAL INCREASE IS NOW 80 MILLION PEOPLE, WITH MOST OF THAT INCREMENT COMING IN LESS DEVELOPED COUNTRIES.ACCORDING TO THE UN"S MIDDLE ESTIMATE, HUMAN POPULATION WILL RISE FROM THE PRESENT 5.9 BILLION TO 9.4 BILLION BY THE YEAR 2050, THEN TO 10.8 BILLION BY 2150, BEFORE LEVELING OFF THERE AT THE END OF THE TWENTY-SECOND CENTURY.ANYONE INTERESTED IN THE FUTURE OF BIOLOGICAL DIVERSITY NEEDS TO THINK ABOUT THE PRESSURES THESE PEOPLE WILL FACE, AND THE PRESSURES THEY WILL EXERT IN RETUR

N. 【A5】______ THAT DIRECTION, NECESSARILY, WILL BE TOWARD EVER MORE DESPERATE EXPLOITATION OF LANDSCAP

E.EVEN NOAH"S ARK ONLY MANAGES TO RESCUE PAIRED ANIMALS, NOT LARGE PARCELS OF HABITAT.THE JEOPARDY OF THE ECOLOGICAL FRAGMENTS THAT WE PRESENTLY CHERISH AS PARKS, REFUGES, AND RESERVES IS ALREADY SEVERE, DUE TO INTERNAL AND EXTERNAL FORCES: INTERNAL, BECAUSE INSULARITY ITSELF LEADS TO ECOLOGICAL UNRAVELING; AND EXTERNAL, BECAUSE THOSE AREAS ARE STILL UNDER SIEGE BY NEEDY AND COVETOUS PEOPL

E.WE SHOULDN"T TAKE COMFORT IN ASSUMING THAT AT LEAST YELLOWSTONE NATIONAL PARK WILL STILL HARBOR BEARS IN THE YEAR 2150, THAT AT LEAST ROYAL CHIT-WAN IN NEPAL WILL STILL HARBOR TIGERS AND GIR IN INDIA WILL STILL HARBOR LIONS.THOSE PREDATOR POPULATIONS, AND OTHER SPECIES DOWN THE CASCADE, ARE LIKELY TO DISAPPEAR."WILDNESS" WILL BE A WORD APPLICABLE ONLY TO URBAN TURMOIL.LIONS, TIGERS, AND BEARS WILL EXIST IN ZOOS.NATURE WON"T COME TO AN END, BUT IT WILL LOOK VERY DIFFERENT.

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第4题

【A4】A.THE DISASTROUS IMPACT ON BIODIVERSITY. B.HUMAN POPULATION GROWTH WORSENS THE PROBLE

【A4】

A.THE DISASTROUS IMPACT ON BIODIVERSITY.

B.HUMAN POPULATION GROWTH WORSENS THE PROBLE

M.

C.WHAT IS LAND CONVERSION？

D.PROTECTED AREAS ARE UNDER THREAT.

E.THE LAND-CONVERSION CASCAD

E. BEHIND THE PROJECTIONS OF SPECIES LOSS LURK A NUMBER OF CRUCIAL BUT HARD-TO-PLOT VARIABLES, AMONG WHICH TWO ARE ESPECIALLY WEIGHTY; CONTINUING LANDSCAPE CONVERSION AND THE GROWTH CURVE OF HUMAN POPULATIO

N. 【A1】______ LANDSCAPE CONVERSION CAN MEAN MANY THINGS:DRAINING WETLANDS TO BUILD ROADS AND AIRPORTS, TURNING TALLGRASS (高秆草) PRAIRIES UNDER THE PLOW, FENCING SAVANNA (热带大草原) AND OVERGRAZING IT WITH DOMESTIC STOCK, CUTTING SECOND-GROWTH FOREST VERMONT AND CONSIGNING THE LAND TO SKI RESORTS OR VACATION SUBURBS, SLASH-AND-BURN CLEARING OF MADAGASCAR"S (马达加斯加) RAIN FOREST TO GROW RICE ON WET HILLSIDES, INDUSTRIAL LOGGING IN BORNEO (婆罗洲) TO MEET JAPANESE PLYWOOD DEMANDS. 【A2】______ THE ECOLOGIST JOHN TERBORGH AND A COLLEAGUE CAREL P.VAN SCHAIK, HAVE DESCRIBED A FOUR-STAGE PROCESS OF LANDSCAPE CONVERSION THAT THEY CALL THE LAND-USE CASCAD

E.THE SUCCESSIVE STAGES ARE (1)WILDLANDS, ENCOMPASSING NATIVE FLORAL AND FAUNAL COMMUNITIES ALTERED LITTLE OR NOT AT ALL BY HUMAN IMPACT; (2)EXTENSIVELY USED AREAS, SUCH AS NATURAL GRASSLANDS LIGHTLY GRAZED, SAVANNA KEPT OPEN FOR PREY ANIMALS BY INFREQUENT HUMAN-SET FIRES, OR FORESTS SPARSELY WORKED BY SLASH-AND-BURN FARMERS AT LOW DENSITY; (3)INTENSIVELY USED AREAS, MEANING CROP FIELDS, PLANTATIONS, VILLAGE COMMONS, TRAVEL CORRIDORS, URBAN AND INDUSTRIAL ZONES; AND FINALLY(4)DEGRADED LAND, FORMERLY USEFUL BUT NOW ABUSED BEYOND VALUE TO ANYBODY. 【A3】______ AMONG ALL FORMS OF LANDSCAPE CONVERSION, PUSHING TROPICAL FOREST FROM THE WILDLANDS CATEGORY TO THE INTENSIVELY USED CATEGORY HAS THE GREATEST IMPACT ON BIOLOGICAL DIVERSITY.YOU CAN SEE IT IN THE CENTRAL AMAZON, WHERE BIG TRACTS OF RAIN FOREST HAVE BEEN FELLED AND BURNED, IN A LARGELY FUTILE ATTEMPT TO PASTURE CATTLE ON SUN- HARDENED CLAY.BY THE MIDDLE OF THE NEXT CENTURY, IF TREND CONTINUE, TROPICAL FOREST WILL EXIST VIRTUALLY NOWHERE OUTSIDE OF PROTECTED AREAS—THAT IS, NATIONAL PARKS, WILDLIFE REFUGES, AND OTHER OFFICIAL RESERVES. 【A4】______ HUMAN POPULATION GROWTH WILL MAKE A BAD SITUATION WORSE BY PUTTING EVER MORE PRESSURE ON ALL AVAILABLE LAN

D.THE ANNUAL INCREASE IS NOW 80 MILLION PEOPLE, WITH MOST OF THAT INCREMENT COMING IN LESS DEVELOPED COUNTRIES.ACCORDING TO THE UN"S MIDDLE ESTIMATE, HUMAN POPULATION WILL RISE FROM THE PRESENT 5.9 BILLION TO 9.4 BILLION BY THE YEAR 2050, THEN TO 10.8 BILLION BY 2150, BEFORE LEVELING OFF THERE AT THE END OF THE TWENTY-SECOND CENTURY.ANYONE INTERESTED IN THE FUTURE OF BIOLOGICAL DIVERSITY NEEDS TO THINK ABOUT THE PRESSURES THESE PEOPLE WILL FACE, AND THE PRESSURES THEY WILL EXERT IN RETUR

N. 【A5】______ THAT DIRECTION, NECESSARILY, WILL BE TOWARD EVER MORE DESPERATE EXPLOITATION OF LANDSCAP

E.EVEN NOAH"S ARK ONLY MANAGES TO RESCUE PAIRED ANIMALS, NOT LARGE PARCELS OF HABITAT.THE JEOPARDY OF THE ECOLOGICAL FRAGMENTS THAT WE PRESENTLY CHERISH AS PARKS, REFUGES, AND RESERVES IS ALREADY SEVERE, DUE TO INTERNAL AND EXTERNAL FORCES: INTERNAL, BECAUSE INSULARITY ITSELF LEADS TO ECOLOGICAL UNRAVELING; AND EXTERNAL, BECAUSE THOSE AREAS ARE STILL UNDER SIEGE BY NEEDY AND COVETOUS PEOPL

E.WE SHOULDN"T TAKE COMFORT IN ASSUMING THAT AT LEAST YELLOWSTONE NATIONAL PARK WILL STILL HARBOR BEARS IN THE YEAR 2150, THAT AT LEAST ROYAL CHIT-WAN IN NEPAL WILL STILL HARBOR TIGERS AND GIR IN INDIA WILL STILL HARBOR LIONS.THOSE PREDATOR POPULATIONS, AND OTHER SPECIES DOWN THE CASCADE, ARE LIKELY TO DISAPPEAR."WILDNESS" WILL BE A WORD APPLICABLE ONLY TO URBAN TURMOIL.LIONS, TIGERS, AND BEARS WILL EXIST IN ZOOS.NATURE WON"T COME TO AN END, BUT IT WILL LOOK VERY DIFFERENT.

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第5题

Most earthquakes occur within the upper 15 miles of the earth's surface. But earthquakes c

an and do occur at all depths to about 460 miles. Their number decreases as the depth increases. At about 460 miles one earthquake occurs only every few years. Near the surface earthquakes may run as high as 100 in a month, but the yearly average does not vary much. In comparison with the total number of earthquakes each year, the number of disastrous earthquakes is very small.

The extent of the disaster in an earthquake depends on many factors. If you carefully build a toy house with an erect set, it will still stand no matter how much you shake the table. But if you build a toy house with a pack of cards, a slight shake of the table will make it fall. An earthquake in Agadir, Morocco, was not strong enough to be recorded on distant instruments, but it completely destroyed the city. Many stronger earthquakes have done comparatively little damage. If a building is well constructed and built on solid ground, it will resist an earthquake. Most deaths in earthquakes have been due to faulty building construction or poor building sites. A third and very serious factor is panic. When people rush out into narrow streets, more deaths will result.

The United Nations has played an important part in reducing the damage done by earthquakes. It has sent a team of experts to all countries known to be affected by earthquakes. Working with local geologists and engineers, the experts have studied the nature of the ground and the type of most practical building code for the local area. If followed, these suggestions will make disastrous earthquakes almost a thing of the past.

There is one type of earthquake disaster that little can be done about. This is the disaster caused by seismic (地震的) sea waves, or tsunamis. These are often called tidal (海潮的) waves, but the name is incorrect. They have nothing to do with tides.

In certain areas, earthquakes take place beneath the sea. These submarine earthquakes sometimes give rise to seismic sea waves. The waves are not noticeable out at sea because of their long wave length. But when they roll into harbors, they pile up into walls of water 6 to 60 feet high. The Japanese call them "tsunamis", meaning "harbor waves", because they reach a sizable height only in harbors.

Tsunamis (海啸) travel fairly slowly, at a speed of up to 500 miles an hour. An adequate warning system is in use to warn all shores likely to be reached by the waves.

But this only enables people to leave the threatened shores for higher ground. There is no way to stop the oncoming waves.

Which of the following CANNOT be concluded from the passage？

A．The number of earthquakes is closely related to depth.

B．Roughly the number of earthquakes varies much every year.

C．Earthquakes are most likely to occur within the upper 15 miles of the earth's surface.

D．Earthquakes are most likely to occur near the surfaces.

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第6题

One of the greatest mysteries of the world, for 'which scientist have so far been unable t

o find any satisfactory explanation, is the Bermuda Triangle, sometime called "the Graveyard of the Atlantic." This is an area of the western Atlantic between Bermuda and Florida, roughly triangular in shape where since 1945 at least a hundred ships and planes and over a thousand people have disappeared. No wreckage had been found, no bodies, lifebelts or any other evidence of disater. It is as if these planes, ships and people had never existed. In some cases a routine radio message has been received from aircraft reporting everything in order a few minutes before all contact was lost, in others a weak S. O. S message has been picked up and, in perfect weather, inexplicable references to fog and loss of bearings. In the extraordinary case of five U. $. navy planes disappearing on a routine mission from Florida, the rescue place sent to locate them vanished also. There have been references to the curious white light or haze which is a feature of the sea in part of this area, and it is interesting to note that not only was this light, or streaks of light, observed by the astronauts on their way to space, but was also noted by Columbus, five centuries ago. Whether this light has any connection with the mysterious disappearance is unknown-it is just another curious circumstance as yet unexplained.

Many theories, some bordering on the fantastic, have been advanced to account for the disturbing incidents that occur in the area of the Bermuda Triangle. It has been asked whether these disappearances are caused by extraterrestrial activity, by some undiscovered source of energy, or some dimension of time or space unguessed at by Man. This is no answer and speculation continues as anxiety increases.

What is the most puzzling feature of the incidents that have occurred in the Bermuda Triangle area？

A．The unexplained wreckage found in the area.

B．The lack of evidence of disaster.

C．The appearance of the wreckage.

D．The disastrous losses in the area.

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第7题

A．Love is blind.B．Love breeds love.C．Divorce often has disastrous consequences.D．Happi

A．Love is blind.

B．Love breeds love.

C．Divorce often has disastrous consequences.

D．Happiness is hard to find in blended families.

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第8题

While the new health insurance regulations may be onerous for large corporations, it can p

otentially be disastrous for small business owners, who in many cases will have to lay off employees in order to pay for the extended coverage.

A．it can potentially be disastrous for small business owners, who

B．they are potential disasters for small business owners, since

C．potentially they will be disastrous for small business owners, whom

D．for small business owners it is a potential disaster, because

E．they are potentially disastrous for small business owners, who

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第9题

A.Love is blind.B.Love breeds love.C.Divorce often has disastrous conseq

A.Love is blind.

B.Love breeds love.

C.Divorce often has disastrous consequences.

D.Happiness is hard to find in blended families.

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第10题

No sooner did he complete the job______he found hed made a disastrous mistake.A．whenB．what

No sooner did he complete the job______he found hed made a disastrous mistake.

A．when

B．what

C．than

D．that

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