Why do researchers estimate elephant numbers in an area by counting dung piles?A Because elephants are difficult to catch.B Because it is not possible to count elephants from a plane.C Because it is not possible to keep track of elephants.D Because elephants are shy animals.
Why do researchers estimate elephant numbers in an area by counting dung piles?
A Because elephants are difficult to catch.
B Because it is not possible to count elephants from a plane.
C Because it is not possible to keep track of elephants.
D Because elephants are shy animals.
B Because it is not possible to count elephants from a plane.
C Because it is not possible to keep track of elephants.
D Because elephants are shy animals.
参考解析
解析：
相关考题：
(piston area)×(piston stroke)×(numbers of the cylinders)=engine( ).A.brake horsepowerB.displacementC.cylinder volumeD.cylinder clearance
在Release10,LTE针对MBMS业务引入了counting机制,关于该机制以下描述错误的是? A.Counting机制适用于空闲态及连接态UEB.Counting机制只能针对一个MBSFN area而非单个eNBC.网络对正在或还未提供的MBMS业务均可发起CountingD.UE不能主动告诉网络其MBMS业务兴趣的改变
What is the relationship between the estimate and the plan?__________.A.The plan depends on the estimateB.The estimate depends on the planC.The plan has nothing to do with the estimateD.The estimate and the plan depend on each other
共用题干第二篇Don ' t Count on Dung" Conservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants."say African and American researchers.The error occurs because of a flaw in the way that they estimate animal numbers from the piles of dung（粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions,according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees."We really need to know ele- phant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa. So researchers of- ten estimate elephant numbers by counting dung piles in a given area.They also need to know the rate at which dung decays.Because it's extremely difficult to determine these rates,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment. " Using the wrong values can lead the census astray（离开正道）,"says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Came- roon.They found that the dung decayed between 55 and 65 per cent more slowly than the dung in therainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon, they would probably find more elephants than are actually around."This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,"says Plumptre."However accurate your dung density estimate might be,the decay rate can severely affect the result."Plumptre also says that the dung-pile census should be carried out over a region similar in size to an ele- phant's natural range."The usual technique of monitoring only small,protected areas distorts numbers be-cause elephants move in and out of these regions,"he says."If the elephant population increases within the protected area,you cannot determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evi-- dence such as nests,tracks or burrows（地洞）.Piles of dung can't be relied upon when it comes to estimating elephant numbers because_______.A:they are different in sizeB:they scatter all over the regionC:they are different in decay rateD:they are different in quality
共用题干第二篇Don ' t Count on Dung" Conservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants."say African and American researchers.The error occurs because of a flaw in the way that they estimate animal numbers from the piles of dung（粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions,according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees."We really need to know ele- phant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa. So researchers of- ten estimate elephant numbers by counting dung piles in a given area.They also need to know the rate at which dung decays.Because it's extremely difficult to determine these rates,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment. " Using the wrong values can lead the census astray（离开正道）,"says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Came- roon.They found that the dung decayed between 55 and 65 per cent more slowly than the dung in therainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon, they would probably find more elephants than are actually around."This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,"says Plumptre."However accurate your dung density estimate might be,the decay rate can severely affect the result."Plumptre also says that the dung-pile census should be carried out over a region similar in size to an ele- phant's natural range."The usual technique of monitoring only small,protected areas distorts numbers be-cause elephants move in and out of these regions,"he says."If the elephant population increases within the protected area,you cannot determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evi-- dence such as nests,tracks or burrows（地洞）.According to Plumptre,the region over which a dung-pile census is carried out should be_________.A:small enoughB:well protectedC:carefully monitoredD:large enough
共用题干第二篇Don ' t Count on Dung" Conservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants."say African and American researchers.The error occurs because of a flaw in the way that they estimate animal numbers from the piles of dung（粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions,according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees."We really need to know ele- phant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa. So researchers of- ten estimate elephant numbers by counting dung piles in a given area.They also need to know the rate at which dung decays.Because it's extremely difficult to determine these rates,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment. " Using the wrong values can lead the census astray（离开正道）,"says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Came- roon.They found that the dung decayed between 55 and 65 per cent more slowly than the dung in therainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon, they would probably find more elephants than are actually around."This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,"says Plumptre."However accurate your dung density estimate might be,the decay rate can severely affect the result."Plumptre also says that the dung-pile census should be carried out over a region similar in size to an ele- phant's natural range."The usual technique of monitoring only small,protected areas distorts numbers be-cause elephants move in and out of these regions,"he says."If the elephant population increases within the protected area,you cannot determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evi-- dence such as nests,tracks or burrows（地洞）.The first word"He"in Paragraph 6 refers to________.A:Andrew PlumptreB:Katy PayneC:Anthony Chifu NchanjiD:the writer of the article
共用题干第二篇Don ' t Count on Dung" Conservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants."say African and American researchers.The error occurs because of a flaw in the way that they estimate animal numbers from the piles of dung（粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions,according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees."We really need to know ele- phant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa. So researchers of- ten estimate elephant numbers by counting dung piles in a given area.They also need to know the rate at which dung decays.Because it's extremely difficult to determine these rates,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment. " Using the wrong values can lead the census astray（离开正道）,"says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Came- roon.They found that the dung decayed between 55 and 65 per cent more slowly than the dung in therainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon, they would probably find more elephants than are actually around."This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,"says Plumptre."However accurate your dung density estimate might be,the decay rate can severely affect the result."Plumptre also says that the dung-pile census should be carried out over a region similar in size to an ele- phant's natural range."The usual technique of monitoring only small,protected areas distorts numbers be-cause elephants move in and out of these regions,"he says."If the elephant population increases within the protected area,you cannot determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evi-- dence such as nests,tracks or burrows（地洞）.Why do researchers estimate elephant numbers in an area by counting dung piles?A:Because elephants are difficult to catch.B:Because it is not possible to count elephants from a plane.C:Because it is not possible to keep track of elephants.D:Because elephants are shy animals.
共用题干第二篇Don't Count on DungConservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants,say African and American researchers.The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung （粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions,according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees.“We really need to know elephant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa.So researchers often estimate elephant numbers by counting dung piles in a given area.They also need to know the rate at which dung decays.Because it's extremely difficult to determine these rates,however,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment.Using the wrong values can lead the censusastray（离开正道）,says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Cameroon.They found that the dung decayed between 55 and 65 per cent more slowly than the dung in the rainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon,they would probably find more elephants than are actually around.This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,says Plumptre."However accurate your dung densityestimate might be,the decay rate can severely affect the result.''Plumptre also says that the dung-pile census should be carried out over a region similar in size to an elephant's natural range.The usual technique of monitoring only small, protected areas distorts numbers because elephants move in and out of these regions,he says."If the elephant population increases within the protected area,you can not determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evidence such as nests,tracks or burrows（地洞）.Why do researchers estimate elephant numbers in an area by counting dung piles?A:Because elephants are difficult to catch.B:Because it is not possible to count elephants from a plane.C:Because it is not possible to keep track of elephants.D:Because elephants are shy animals.
共用题干第二篇Don't Count on DungConservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants,say African and American researchers.The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung （粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions,according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees.“We really need to know elephant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa.So researchers often estimate elephant numbers by counting dung piles in a given area.They also need to know the rate at which dung decays.Because it's extremely difficult to determine these rates,however,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment.Using the wrong values can lead the censusastray（离开正道）,says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Cameroon.They found that the dung decayed between 55 and 65 per cent more slowly than the dung in the rainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon,they would probably find more elephants than are actually around.This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,says Plumptre."However accurate your dung densityestimate might be,the decay rate can severely affect the result.''Plumptre also says that the dung-pile census should be carried out over a region similar in size to an elephant's natural range.The usual technique of monitoring only small, protected areas distorts numbers because elephants move in and out of these regions,he says."If the elephant population increases within the protected area,you can not determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evidence such as nests,tracks or burrows（地洞）.According to Plumptre,the region over which a dung-pile census is carried out should beA:small enough.B:well protected.C:carefully monitored.D:large enough.
共用题干第二篇Don't Count on DungConservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants,say African and American researchers.The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung （粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions,according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees.“We really need to know elephant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa.So researchers often estimate elephant numbers by counting dung piles in a given area.They also need to know the rate at which dung decays.Because it's extremely difficult to determine these rates,however,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment.Using the wrong values can lead the censusastray（离开正道）,says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Cameroon.They found that the dung decayed between 55 and 65 per cent more slowly than the dung in the rainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon,they would probably find more elephants than are actually around.This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,says Plumptre."However accurate your dung densityestimate might be,the decay rate can severely affect the result.''Plumptre also says that the dung-pile census should be carried out over a region similar in size to an elephant's natural range.The usual technique of monitoring only small, protected areas distorts numbers because elephants move in and out of these regions,he says."If the elephant population increases within the protected area,you can not determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evidence such as nests,tracks or burrows（地洞）.The word "threatened" in the first sentence of the first paragraph could be best replaced byA:"endangered".B:"frightened".C:"killed".D:"angered".
共用题干第二篇Don't Count on DungConservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants,say African and American researchers.The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung （粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions,according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees.“We really need to know elephant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa.So researchers often estimate elephant numbers by counting dung piles in a given area.They also need to know the rate at which dung decays.Because it's extremely difficult to determine these rates,however,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment.Using the wrong values can lead the censusastray（离开正道）,says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Cameroon.They found that the dung decayed between 55 and 65 per cent more slowly than the dung in the rainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon,they would probably find more elephants than are actually around.This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,says Plumptre."However accurate your dung densityestimate might be,the decay rate can severely affect the result.''Plumptre also says that the dung-pile census should be carried out over a region similar in size to an elephant's natural range.The usual technique of monitoring only small, protected areas distorts numbers because elephants move in and out of these regions,he says."If the elephant population increases within the protected area,you can not determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evidence such as nests,tracks or burrows（地洞）.The first word"He"in paragraph 6 refers toA:Andrew Plumptre.B:Katy Payne.C:Anthony Chifu Nchanji.D:the writer of the article.
Don’t count on dung Conservationists (自然保护主义者) may be miscalculating the numbers of the threatened animals such as elephants, say African and American researchers. The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung (粪) the creatures leave behind. The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions, according to Andrew Plumptre of the Wildlife Conservation Society (WCS) in New York. Biologist Katy Payne of Cornell University in Ithaca, New York, agrees. "We really need to know elephant numbers and the evidence that we have is quite indirect," says Payne, who electronically tracks elephants. Counting elephants from planes is impossible in the vast rainforests of Central Africa. So researchers often estimate elephant numbers by counting dung piles in a given area. They also need to know the rate at which dung decays: Because it's extremely difficult to determine these rates, however, researchers counting elephants in one region tend to rely on standard decay rates established elsewhere. But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment. Using the wrong values can lead the census astray (离开正道), says Plumptre. He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Cameroon. They found that the dung decayed between 55 and 65 per cent more slowly than the dung in the rainforests of neighbouring Gabon. If researchers use decay rates from Gabon to count elephants in Cameroon, they would probably find more elephants than are actually around. This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally, says Plumptre. "However accurate your dung density estimate might be, the decay rate can severely affect the result." Plumptre also says that the dung-pile census should be carried out over a region similar in size to an elephant's natural range. The usual technique of monitoring only small, protected areas distorts numbers because elephants move in and out of these regions, he says. "If the elephant population increases within the protected area, you can not determine whether it is a real increase or whether it is due to elephants moving in because they are being poached (入侵偷猎) outside." Plumptre says that similar problems may also affect other animal census studies that rely on indirect evidence such as nests, tracks or burrows (地洞).文章(31~35)The word "threatened" in the first sentence of the first paragraph could be best replaced byA "endangered".B "frightened".C "killed".D "angered".
Piles of dung can't be relied upon when it comes to estimating elephant numbers becauseA they are different in size.B they scatter all over the region.C they are different in decay rate.D they are different in quality.
共用题干第二篇Don't Count on DungConservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants,say African and American researchers.The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung （粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions,according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees.“We really need to know elephant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa.So researchers often estimate elephant numbers by counting dung piles in a given area.They also need to know the rate at which dung decays.Because it's extremely difficult to determine these rates,however,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment.Using the wrong values can lead the censusastray（离开正道）,says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Cameroon.They found that the dung decayed between 55 and 65 per cent more slowly than the dung in the rainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon,they would probably find more elephants than are actually around.This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,says Plumptre."However accurate your dung densityestimate might be,the decay rate can severely affect the result.''Plumptre also says that the dung-pile census should be carried out over a region similar in size to an elephant's natural range.The usual technique of monitoring only small, protected areas distorts numbers because elephants move in and out of these regions,he says."If the elephant population increases within the protected area,you can not determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evidence such as nests,tracks or burrows（地洞）.Piles of dung can't be relied upon when it comes to estimating elephant numbers becauseA:they are different in size.B:they scatter all over the region.C:they are different in decay rate.D:they are different in quality.
共用题干第二篇Don't Count on Dung（粪便）Conservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants,say African and American researchers. The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung（粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees,"We really need to know elephant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa. So researchers often estimate elephant numbers by counting dung piles in a given area. They also need to know the rate at which dung decays because it's extremely difficult to determine these rates. However,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment. "Using the wrong values can lead the census astray（离开正道）,"says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Cameroon.They found that the dung decayed between 55 and 65 percent more slowly than the dung in the rainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon,they would probably find more elephants than are actually around.This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,says Plumptre"However accurate your dung density estimate might be,the decay rate can severely affect the result."Plumptre also says that the dung-pile census should be carried out over a region similar in size to an elephant's natural range.The usual technique of monitoring only small,protected areas distorts numbers because elephants move in and out of these regions,he says"If the elephant population increases within the protected area,you cannot determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evidence such as nests,tracks or burrows（地洞）. Piles of dung can't be relied upon when it comes to estimating elephant numbers because______.A:they are different in sizeB:they scatter an over the regionC:they are different in decay rateD:they are different in quality
共用题干第二篇Don't Count on Dung（粪便）Conservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants,say African and American researchers. The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung（粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees,"We really need to know elephant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa. So researchers often estimate elephant numbers by counting dung piles in a given area. They also need to know the rate at which dung decays because it's extremely difficult to determine these rates. However,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment. "Using the wrong values can lead the census astray（离开正道）,"says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Cameroon.They found that the dung decayed between 55 and 65 percent more slowly than the dung in the rainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon,they would probably find more elephants than are actually around.This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,says Plumptre"However accurate your dung density estimate might be,the decay rate can severely affect the result."Plumptre also says that the dung-pile census should be carried out over a region similar in size to an elephant's natural range.The usual technique of monitoring only small,protected areas distorts numbers because elephants move in and out of these regions,he says"If the elephant population increases within the protected area,you cannot determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evidence such as nests,tracks or burrows（地洞）.According to Plumptre,the region over which a dung-pile census is carried out should be______.A:small enough B:well protectedC:carefully monitored D:large enough
共用题干第二篇Don't Count on Dung（粪便）Conservationists（自然保护主义者）may be miscalculating the numbers of the threatened animals such as elephants,say African and American researchers. The error occurs because of a flaw in the way they estimate animal numbers from the piles of dung（粪）the creatures leave behind.The mistake could lead researchers to think that there are twice as many elephants as there really are in some regions according to Andrew Plumptre of the Wildlife Conservation Society(WCS)in New York.Biologist Katy Payne of Cornell University in Ithaca,New York,agrees,"We really need to know elephant numbers and the evidence that we have is quite indirect,"says Payne,who electronically tracks elephants.Counting elephants from planes is impossible in the vast rainforests of Central Africa. So researchers often estimate elephant numbers by counting dung piles in a given area. They also need to know the rate at which dung decays because it's extremely difficult to determine these rates. However,researchers counting elephants in one region tend to rely on standard decay rates established elsewhere.But researchers at the WCS have found that this decay rate varies from region to region depending on the climate and environment. "Using the wrong values can lead the census astray（离开正道）,"says Plumptre.He and his colleague Anthony Chifu Nchanji studied decaying elephant dung in the forests of Cameroon.They found that the dung decayed between 55 and 65 percent more slowly than the dung in the rainforests of neighbouring Gabon.If researchers use decay rates from Gabon to count elephants in Cameroon,they would probably find more elephants than are actually around.This could mean estimates in Cameroon are at least twice as high as those derived from decay rates calculated locally,says Plumptre"However accurate your dung density estimate might be,the decay rate can severely affect the result."Plumptre also says that the dung-pile census should be carried out over a region similar in size to an elephant's natural range.The usual technique of monitoring only small,protected areas distorts numbers because elephants move in and out of these regions,he says"If the elephant population increases within the protected area,you cannot determine whether it is a real increase or whether it is due to elephants moving in because they are being poached（入侵偷猎）outside."Plumptre says that similar problems may also affect other animal census studies that rely on indirect evidence such as nests,tracks or burrows（地洞）.Why do researchers estimate elephant numbers in an area by counting dung piles?A:Because elephants are difficult to catch.B:Because it is not possible to count elephants from a plane.C:Because it is not possible to keep track of elephants.D:Because elephants are shy anitnals.
Why would you make a non-backbone area a stub or not-so-stubby area？（）A、 to aggregate routes learned from the ABRB、 to lower the cost of routes advertised by the ABRC、 to connect a non-contiguous area to the backboneD、 to decrease the size of the link-state database in that area
在Release10，LTE针对MBMS业务引入了counting机制，关于该机制以下描述错误的是？A、Counting机制适用于空闲态及连接态UEB、Counting机制只能针对一个MBSFN area而非单个eNBC、网络对正在或还未提供的MBMS业务均可发起CountingD、UE不能主动告诉网络其MBMS业务兴趣的改变
What do the entries in the /proc directory represent？（）A、They are the decimal numbers corresponding to the active process IDs.B、They are the decimal numbers corresponding to the gid of the system group.C、They are the decimal numbers corresponding to the block IDs of the boot sector.D、They are the decimal numbers corresponding to the inodes of the system directories.
单选题(Piston area)X(Piston stroke)K(numbers of the cylinders)=engine（）Abrake horsepowerBdisplacementCcylinder volumeDcylinder clearance
单选题水手长，我们为什么要开舱盖?（）ABosun, why do we open hatch covers?BOfficer, why do we open hatch covers?CBosun, why do we close hatch covers?DBosun, why do we open hatches?
单选题Why would you make a non-backbone area a stub or not-so-stubby area？（）A to aggregate routes learned from the ABRB to lower the cost of routes advertised by the ABRC to connect a non-contiguous area to the backboneD to decrease the size of the link-state database in that area