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单选题
The scientists are not sure_______.
A
how long the ice age lasted
B
where ice sheets melted during the ice age
C
what caused the temperature changes
D
what the earth is made up of
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更多 “单选题The scientists are not sure_______.A how long the ice age lastedB where ice sheets melted during the ice ageC what caused the temperature changesD what the earth is made up of” 相关考题
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It was not very long () scientists applied the technique to other species.
A、whileB、thenC、beforeD、after
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The wish of the scientists is _________ new resources for mankind.
A. findB. to be foundC. to findD. found
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28． Which is NOT true?A． The land never stops becoming deserts．B． Scientists ask the people to live in the deserts and grow food there．C． People do bad things to the earth．D． Scientists may not be able to change the deserts．
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Professor Taylor's talk has indicated that science has a very strong influence on the everyday life of non-scientists as well as scientists.A:motivation
B:perspective
C:impression
D:impact
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第三篇Citizen ScientistsUnderstanding how nature responds to climate change will require monitoring key life cycle events一 flowering,the appearance of leaves and the first frog calls of the spring一all around the world.But ecologists can't be everywhere so they're turning to non-scientists,sometimes called citizen scientists,for help.Climate scientists are not present everywhere.Because there are so many places in the world and not enough scientists to observe all of them,they're asking for your help in observing signs of climate change across the world.The citizen scientist movement encourages ordinary people to observe a very specificresearch interest一birds,trees,flowers budding,etc.and send their observations to a giant database to be observed by professional scientists.This helps a small number of scientists track a large amount of data that they would never be able to gather on their own.Much like citizen journalists helping large publications cover a hyper-local beat,citizen scientists are ready for the conditions where they live in.All that's needed to become one is a few minutes each day or each week to gather data and send them in.A group of scientists and educators launched an organization last year called the National Phenology Network."Phenology"is what scientists call the study of the timing of events in nature.One of the group's first efforts relies on scientists and non-scientists alike to collect data about plant flowering and leafing eveiy year.The program,called Project BudBurst,collects life cycle data on a variety of common plants from across the United States.People participating in the project一which is open to every- one一record their observations on the Project BudBurst website."People don't have to be plant experts一they just have to look around and see what's in their neighbor- hood,"says Jennifer Schwartz,an education consultant with the project."As we collect these data,we'll be able to make an estimate of how plants and communities of plants and animals will respond as the climatechanges."In"All that's needed to become one…（Paragraph 2)",what does the word"one"stand for?A:A citizen journalist.B:A citizen scientist?C:A scientist.D:A citizen.
考题
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第三篇Citizen ScientistsUnderstanding how nature responds to climate change will require monitoring key life cycle events一 flowering,the appearance of leaves and the first frog calls of the spring一all around the world.But ecologists can't be everywhere so they're turning to non-scientists,sometimes called citizen scientists,for help.Climate scientists are not present everywhere.Because there are so many places in the world and not enough scientists to observe all of them,they're asking for your help in observing signs of climate change across the world.The citizen scientist movement encourages ordinary people to observe a very specificresearch interest一birds,trees,flowers budding,etc.and send their observations to a giant database to be observed by professional scientists.This helps a small number of scientists track a large amount of data that they would never be able to gather on their own.Much like citizen journalists helping large publications cover a hyper-local beat,citizen scientists are ready for the conditions where they live in.All that's needed to become one is a few minutes each day or each week to gather data and send them in.A group of scientists and educators launched an organization last year called the National Phenology Network."Phenology"is what scientists call the study of the timing of events in nature.One of the group's first efforts relies on scientists and non-scientists alike to collect data about plant flowering and leafing eveiy year.The program,called Project BudBurst,collects life cycle data on a variety of common plants from across the United States.People participating in the project一which is open to every- one一record their observations on the Project BudBurst website."People don't have to be plant experts一they just have to look around and see what's in their neighbor- hood,"says Jennifer Schwartz,an education consultant with the project."As we collect these data,we'll be able to make an estimate of how plants and communities of plants and animals will respond as the climatechanges."What are citizen scientists asked to do?A:To develop a specific research interest and become professional scientists.B:To send their research observations to a professional database.C:To increase their knowledge about climate change.D:To keep a record of their research observations.
考题
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An Expensive MistakeIs there water on the planet Mars?Is there life in Mars? Was there ever life on Mars? Scientists from NASA wanted to know the answers to these questions.They built a space-craft to travel around Mars and get information.The spacecraft was called the Mars Climate Orbiter.The Mars Climate Orbiter left for Mars in December 1998.The trip took nine and a half months.At first,everything was fine.However,when the Orbiter got near Mars,something terrible happened.The spacecraft didn't go to the right place.It went too close to Mars.It was too hot for the Orbiter there.The spacecraft couldn't function correctly.Suddenly,it stopped sending messages to NASA.The Orbiter was lost.How could this terrible thing happen? How did the Orbiter get closer to Mars than the scientists planned?Finally,they found the answer.Two teams of scientists worked together on the Orbiter.One team was in England,and one team was in United States.There were many similarities in the way they worked,but there was one important difference:The teams used different guidelines for measuring things.The United States team used the metric system（公制）.The other team used the English system.Because they used different systems,the scientists made a mathematical mistake.The Orbiter's orbit(the shape and pattern of its path)around Mars was not correct.The scientists put the Orbiter on the wrong path.The Orbiter got too close and too hot.And it stopped functioning.Why didn't anybody see the mistake before it was too late? Many things contributed to the problem.One thing was that NASA scientists and mathematicians were working on two other spacecrafts at the same time.This was a challenge,and they were very tired from working long hours.The Mars Climate Orbiter cost$94 million to build.It also cost a lot of money to try to find the lost Orbiter in space.In addition,NASA's research on the cause of the problem was very expensive.This wasn't the first time that two different measurement systems caused mistakes in scientific projects.However,the Mars Climate Orbiter was definitely the most expensive mistake of all!What caused the Orbiter's problem,______.A:Scientists used wrong guidelines of mathematicsB:Scientists used wrong building materialsC:Scientists used different operating systemsD:Scientists used different measurement systems
考题
The scientists have conducted a series of experiments.A:actions
B:tests
C:effects
D:technologies
考题
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Citizen ScientistsUnderstanding how nature responds to climate change will require monitoring key life cycle events-flowering,the appearance of leaves,the first frog calls of the spring-all around the world.But ecologists can't be______(51)so they are turning to non-scientists,sometimes called citizen scientists,for help.Climate scientists are not present everywhere.______(52)there are so many places in the world and not enough scientists to observe all of them,they are asking for your help in_______(53)signs of climate change across the world.The citizen scientist movement encourages______(54)people to observe a very specific research interest-birds,trees,flowers budding,etc-and send their observations______(55)a giant database to be observed by professional scientists.This helps a small number of scientists track a______(56)amount of data that they would never be able to gather on their own.______(57)like citizen journalists helping large publications cover a hyper-local beat,citizen scientists are ready for the conditions where they live.______(58)that's needed to become one is a few minutes each day or each week to gather data and_______(59)it in.A group of scientists and educators launched an organization last year______(60) the NationalPhenology（生物气候学）Network."Phenology" is what scientists call the study of the timing of events in nature.One of the group's first efforts relies on scientists and non-scientists______(61)to collect data about plant flowering and leafing every year.The program,called Project BudBurst,collects life cycle______(62)on a variety of common plants from across the United States.People participating in the project-which is______(63)to everyone-record their observations on the Project BudBurst website."People don't______(64)to be plant experts-they just have to look around and see what's in their neighborhood,"says Jennifer Scheartz,an education consultant with the project."As we collect this data,we'11 be able to make an'estimate of______(65)plants and communities of plants and animals will respond as the climate changes."_________63A:common B:suitable C:open D:strange
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第二篇Citizen ScientistsUnderstanding how nature responds to climate change will require monitoring key life cycle events一flowering,the appearance of leaves,the first frog calls of the spring一all around the world.But ecologists （生态学家）can' t be everywhere so they' re turning to non-scientists, sometimes called citizen scientists,for help.Climate scientists are not present everywhere.Because there are so many places in the world and not enough scientists to observe all of them,they're asking for your help in observing signs of c1imat。 ehang, across the world.The citizen scientist movement encourages ordinary people to observe "very specificresearch interest一birds,trees,flowers budding,etc. and send their observations to a giant database （数据库）to be observed by professional scientists. This helps a small number of scientists track a large amount of data that they would never be able to gather on their own.Much like citizen journalists helping large publications cover a hyper-local beat,citizen scientists are ready for the conditions where they live.All that's needed to become one is a few minutes each day or each week to gather data and send it in.A group of scientists and educators launched an organization last year called the National Phonology Network."Phenology"is what scientists eni1 the study of the timing of events in nature.One of the group's first efforts relies on scientists and non-scientists alike to collect data about plant flowering and leafing every year. The program,called Project BudBurst,collects life eyele data on a variety of common plants from across the United States.People participating in the project一which is open to every- one一record their observations on the Project BudBurst website."People don't have to be plant experts一they just have to look around and see what's in their neighborhood,"says Jennifer Schwartz,an education consultant with the project."As we collect this data, we'll be able to make an estimate of how p'ants and communities（生物群落）of plants and animals will re- spond as the climate changes."What are citizen scientists asked to do?A:To develop a specific research interest and become professional scientists.B:To send their research observations to a professional database.C:To increase their knowledge about climate change.D:To keep a record of their research observations.
考题
共用题干
第二篇Citizen ScientistsUnderstanding how nature responds to climate change will require monitoring key life cycle events一flowering,the appearance of leaves,the first frog calls of the spring一all around the world.But ecologists （生态学家）can' t be everywhere so they' re turning to non-scientists, sometimes called citizen scientists,for help.Climate scientists are not present everywhere.Because there are so many places in the world and not enough scientists to observe all of them,they're asking for your help in observing signs of c1imat。 ehang, across the world.The citizen scientist movement encourages ordinary people to observe "very specificresearch interest一birds,trees,flowers budding,etc. and send their observations to a giant database （数据库）to be observed by professional scientists. This helps a small number of scientists track a large amount of data that they would never be able to gather on their own.Much like citizen journalists helping large publications cover a hyper-local beat,citizen scientists are ready for the conditions where they live.All that's needed to become one is a few minutes each day or each week to gather data and send it in.A group of scientists and educators launched an organization last year called the National Phonology Network."Phenology"is what scientists eni1 the study of the timing of events in nature.One of the group's first efforts relies on scientists and non-scientists alike to collect data about plant flowering and leafing every year. The program,called Project BudBurst,collects life eyele data on a variety of common plants from across the United States.People participating in the project一which is open to every- one一record their observations on the Project BudBurst website."People don't have to be plant experts一they just have to look around and see what's in their neighborhood,"says Jennifer Schwartz,an education consultant with the project."As we collect this data, we'll be able to make an estimate of how p'ants and communities（生物群落）of plants and animals will re- spond as the climate changes."What is the final purpose of Project BudBurst?A:To study when plants will have their first buds.B:To find out the types of plants in the neighborhood.C:To collect life cycle data on"variety of common plants from across the United States.D:To investigate how plants and animalsw lll respond as the climate changes.
考题
According to the passage，mathematicians present a danger to scientists for which of the following reasons？( ) A.Mathematicians may provide theories that are incompatible with those already developed by scientists
B.Mathematicians may define situation in a way that is incomprehensible to scientists
C.Mathematicians may convince scientists that theoretical assumptions are facts
D.Scientists may begin to provide arguments that are convincing but imprecise
考题
According to the passage，mathematicians present a danger to scientists for which of the following reasons？( ) A.Mathematicians may provide theories that are incompatible with those already developed by scientists.
B.Mathematicians may define situation in a way that is incomprehensible to scientists.
C.Mathematicians may convince scientists that theoretical assumptions are facts.
D.Scientists may begin to provide arguments that are convincing but imprecise.
考题
单选题What, according to the passage, makes the research conducted by the scientists at the Oregon Department of Health so unique?A
The fact that the scientists managed to measure the average hourly increase of NNK.B
The fact that the scientists succeeded in making more people realize the harm of smoking.C
The fact that the scientists did a lot of experiments on smokers in public areas.D
The fact that the scientists discovered NNK, a carcinogen in cigarette smoke.
考题
单选题It is implied in the passage that ______.A
many scientists had known dinoflagellate before 1988B
there had been no such organisms before 1988C
many scientists were in doubt about the nature of the organism in 1988D
no scientists knew anything about the organism in 1988
考题
单选题The sentence “But this has rarely been a one-way street.” in the last paragraph means that _____.A
contemporary art has been nourished by modern scienceB
modern science has been nourished by artC
artists can become scientists and scientists can become artistsD
the impacts of modern art and science are actually mutual
考题
单选题According to the passage, which of the following statements is NOT true?A
The potential health hazards of mobile phones call for further research.B
The Australian scientists find no connection between growth of tumors in human body and radiation from mobile phones.C
The Italian scientists’ belief is shared by other scientists.D
The British government inquiry didn’t establish any link between health risks and use of mobile phones.
考题
单选题The scientists are trying to find out the facts to _____ their theory.A
supportB
carryC
designD
raise
考题
单选题Which of the following statements about scientists is true?A
Scientists tend to approach non-scientific problems in a more objective way than common people.B
Most scientists believe arts and literature are of little use and hence think little of them.C
Scientists are against the concept that science means a way of looking at the world partly for professional jealousy.D
All scientists are totally in line with the government of their country.
考题
单选题The scientists wanted to keep people _____ about the breakthrough in their experiment.A
informB
informedC
informingD
to inform
考题
单选题In context, which of the following is the best revision of the underlined portion of sentence 3 (reproduced below)?It is because our brains are always working to find the causes of the significant events that we perceive.A
(As it is now)B
They are saying that it isC
For example, it is, these scientists say,D
These scientists believe we adopt superstitionsE
Furthermore, the scientists say it is
考题
判断题Scientists now have a better knowledge of learning complex skills.A
对B
错
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