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Anderson left the table,remarking that he had some work to do.
A: doubting
B: thinking
C: saying
D: knowing
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共用题干
What is the Coolest Gas in the Universe?
What is the coldest air temperature ever recorded on Earth?Where was this low temperature recorded ?
The coldest recorded temperature on Earth was －91℃, which_____ (51) in Antarctica（南极洲）
in 1983.
We encounter an interesting situation when we discuss temperatures in_________(52).Temperatures
in Earth orbit（轨道）actually range from about +120℃ to －120℃. The temperature depends upon
______(53)you are in direct sunlight or in shade.Obviously，－120℃ is colder than our body can
________ (54)endure.
The space temperatures just discussed affect only our area of the solar________(55).Obviously,it
is hotter closer to the Sun and colder as we travel__________(56)from the Sun,Scientigtg egtimate tern-
peratures at Pluto are about －210℃．How cold is the lowest estimated temperature in the entire universe?
Again,it depends upon your_________(57).We are taught it is supposedly__________(58)to have a
temperature below absolute zero,which is－273℃，at which atoms do not move.Two scientists,Cornell
and Wieman,have successfully______(59)down a gas to a temperature barely above absolute zero.
They won a Nobel Prize in Physics in 2001 for their work一not a discovery in this case.
Why is the two scientists'work so important to science?
In the 1920s，Satyendra Nath Bose was studying an interesting_______(60)about special light par-
tidles（微粒）we now call photons（光子）.Bose had trouble __________(61)other scientists to believe his
theory,so he contacted Albert Einstein. Einstein’s calculations helped him theorize that atoms_______(62)
behave as Bose thought一but only at very cold temperatures.
Scientists have also discovered that ultra-cold（超冷）atoms can help them make the world'S atomic
clocks even__________(63)accurate.These clocks are so accurate today they would oniy lose one second
_________ (64)six million years!Such accuracy will help us travel in space because digtanee is velocity
（速度）times time( d=vt).With the long distances involved in space _______(65),we need to know
time as accurately as possibie to get accurate distance.
_________(52)
A:star
B:Earth
C:space
D:planet
What is the Coolest Gas in the Universe?
What is the coldest air temperature ever recorded on Earth?Where was this low temperature recorded ?
The coldest recorded temperature on Earth was －91℃, which_____ (51) in Antarctica（南极洲）
in 1983.
We encounter an interesting situation when we discuss temperatures in_________(52).Temperatures
in Earth orbit（轨道）actually range from about +120℃ to －120℃. The temperature depends upon
______(53)you are in direct sunlight or in shade.Obviously，－120℃ is colder than our body can
________ (54)endure.
The space temperatures just discussed affect only our area of the solar________(55).Obviously,it
is hotter closer to the Sun and colder as we travel__________(56)from the Sun,Scientigtg egtimate tern-
peratures at Pluto are about －210℃．How cold is the lowest estimated temperature in the entire universe?
Again,it depends upon your_________(57).We are taught it is supposedly__________(58)to have a
temperature below absolute zero,which is－273℃，at which atoms do not move.Two scientists,Cornell
and Wieman,have successfully______(59)down a gas to a temperature barely above absolute zero.
They won a Nobel Prize in Physics in 2001 for their work一not a discovery in this case.
Why is the two scientists'work so important to science?
In the 1920s，Satyendra Nath Bose was studying an interesting_______(60)about special light par-
tidles（微粒）we now call photons（光子）.Bose had trouble __________(61)other scientists to believe his
theory,so he contacted Albert Einstein. Einstein’s calculations helped him theorize that atoms_______(62)
behave as Bose thought一but only at very cold temperatures.
Scientists have also discovered that ultra-cold（超冷）atoms can help them make the world'S atomic
clocks even__________(63)accurate.These clocks are so accurate today they would oniy lose one second
_________ (64)six million years!Such accuracy will help us travel in space because digtanee is velocity
（速度）times time( d=vt).With the long distances involved in space _______(65),we need to know
time as accurately as possibie to get accurate distance.
_________(52)
A:star
B:Earth
C:space
D:planet
共用题干
第一篇
A Sunshade（遮阳伞）for the Planet
Even with the best will in the world,reducing our carbon emissions is not going to prevent global warming. It has become clear that even if we take the most strong measures to control emissions, the uncertainties in our climate models still leave open the possibility of extreme warming and rises in sea level. At the same time,resistance by governments and special interest groups makes it quite possible that the actions suggested by climate scientists might not be implemented soon enough.
Fortunately,if the worst comes to the worst,scientists still have a few tricks up their sleeves. For the most part they have strongly resisted discussing these options for fear of inviting a sense of complacency that might thwart efforts to tackle the root of the problem. Until now,that is a growing number of researchers are taking a fresh look at large-scale"geoengineering"projects that might be used to counteract global warming."I use the analogy of methadone,"says Stephen Schneider,a climate researcher at Stanford University in California who was among the first to draw attention to global warming."If you have a heroin addict,the correct treatment is hospitalization,and a long rehab. But if they absolutely refuse,methadone is better than heroin."
Basically the idea is to apply"sunscreen"to the whole planet. One astronomer has come up with a radical plan to cool Earth:launch trillions of feather-light discs into space,where they would form a vast cloud that would block the sun's rays.It's controversial,but recent studies suggest there are ways to deflect just enough of the sunlight reaching the Earth's surface to counteract the warming produced by the greenhouse effect. Global climate models show that blocking just 1.8 percent of the incident energy in the sun's rays would cancel out the warming effects produced by a doubling of greenhouse gases in the atmosphere.That could be crucial,because even the most severe emissions control measures being proposed would leave us with a doubling of carbon dioxide by the end of this century,and that would last for at least a century more.
According to the first two paragraphs,the author thinks that______.
A:strong measures have been taken by the government to prevent global warming
B:It is impossible to prevent global warming by reducing carbon emissions
C:despite the difficulty,scientists have some options to prevent global warming
D:actions suggested by scientists will never be realized
第一篇
A Sunshade（遮阳伞）for the Planet
Even with the best will in the world,reducing our carbon emissions is not going to prevent global warming. It has become clear that even if we take the most strong measures to control emissions, the uncertainties in our climate models still leave open the possibility of extreme warming and rises in sea level. At the same time,resistance by governments and special interest groups makes it quite possible that the actions suggested by climate scientists might not be implemented soon enough.
Fortunately,if the worst comes to the worst,scientists still have a few tricks up their sleeves. For the most part they have strongly resisted discussing these options for fear of inviting a sense of complacency that might thwart efforts to tackle the root of the problem. Until now,that is a growing number of researchers are taking a fresh look at large-scale"geoengineering"projects that might be used to counteract global warming."I use the analogy of methadone,"says Stephen Schneider,a climate researcher at Stanford University in California who was among the first to draw attention to global warming."If you have a heroin addict,the correct treatment is hospitalization,and a long rehab. But if they absolutely refuse,methadone is better than heroin."
Basically the idea is to apply"sunscreen"to the whole planet. One astronomer has come up with a radical plan to cool Earth:launch trillions of feather-light discs into space,where they would form a vast cloud that would block the sun's rays.It's controversial,but recent studies suggest there are ways to deflect just enough of the sunlight reaching the Earth's surface to counteract the warming produced by the greenhouse effect. Global climate models show that blocking just 1.8 percent of the incident energy in the sun's rays would cancel out the warming effects produced by a doubling of greenhouse gases in the atmosphere.That could be crucial,because even the most severe emissions control measures being proposed would leave us with a doubling of carbon dioxide by the end of this century,and that would last for at least a century more.
According to the first two paragraphs,the author thinks that______.
A:strong measures have been taken by the government to prevent global warming
B:It is impossible to prevent global warming by reducing carbon emissions
C:despite the difficulty,scientists have some options to prevent global warming
D:actions suggested by scientists will never be realized
共用题干
So Many"Earths"
The Milky Way（银河）contains billions of Earth-sized planets that could support life.That's the finding of a new study.It draws on data that came from NASA's top planet-hunting telescope.
A mechanical failure recently put that Kepler space telescope out of service.Kepler had played a big role in creating a census of planets orbiting some 170,000 stars.Its data have been helping astronomers predict how common planets are in our galaxy.The telescope focused on hunting planets that might have conditions similar to those on Earth.
The authors of a study,published in The Proceedings of the National Academy of Sciences,conclude that between 14 and 30 out of every 100 stars,with a mass and temperature similar to the Sun,may host a planet that could support life as we know it.Such a planet would have a diameter at least as large as Earth's,but no more than twice that big.The planet also would have to orbit in a star's habitable zone.That's where the surface temperature would allow any water to exist as a liquid.
The new estimate of how many planets might fit these conditions comes from studying more than 42,000 stars and identifying suitable worlds orbiting them.The scientists used those numbers to extrapolate（推算） to the rest of the stars that the telescope could not see.
The estimate is rough,the authors admit.If applied to the solar system,it would define as habitable a zone starting as close to the Sun as Venus and running to as far away as Mars.Neither planet is Earthlike (although either might have been in the distant past).Using tighter limits,the researchers estimate that between 4 and 8 out of every 100 sunlike stars could host an Earth-sized world.These are ones that would take 200 to 400 days to complete a yearly orbit.
Four out of every 100 sunlike stars doesn't sound like a big number.It would mean,however,that the Milky Way could host more than a billion Earth-sized planets with a chance for life.
The main task of the Kepler space telescope is to find out planets with similar conditions to Earth's.
A:Right
B:Wrong
C:Not mentioned
So Many"Earths"
The Milky Way（银河）contains billions of Earth-sized planets that could support life.That's the finding of a new study.It draws on data that came from NASA's top planet-hunting telescope.
A mechanical failure recently put that Kepler space telescope out of service.Kepler had played a big role in creating a census of planets orbiting some 170,000 stars.Its data have been helping astronomers predict how common planets are in our galaxy.The telescope focused on hunting planets that might have conditions similar to those on Earth.
The authors of a study,published in The Proceedings of the National Academy of Sciences,conclude that between 14 and 30 out of every 100 stars,with a mass and temperature similar to the Sun,may host a planet that could support life as we know it.Such a planet would have a diameter at least as large as Earth's,but no more than twice that big.The planet also would have to orbit in a star's habitable zone.That's where the surface temperature would allow any water to exist as a liquid.
The new estimate of how many planets might fit these conditions comes from studying more than 42,000 stars and identifying suitable worlds orbiting them.The scientists used those numbers to extrapolate（推算） to the rest of the stars that the telescope could not see.
The estimate is rough,the authors admit.If applied to the solar system,it would define as habitable a zone starting as close to the Sun as Venus and running to as far away as Mars.Neither planet is Earthlike (although either might have been in the distant past).Using tighter limits,the researchers estimate that between 4 and 8 out of every 100 sunlike stars could host an Earth-sized world.These are ones that would take 200 to 400 days to complete a yearly orbit.
Four out of every 100 sunlike stars doesn't sound like a big number.It would mean,however,that the Milky Way could host more than a billion Earth-sized planets with a chance for life.
The main task of the Kepler space telescope is to find out planets with similar conditions to Earth's.
A:Right
B:Wrong
C:Not mentioned
What are my chances of promotion if I stay here?
A:retirement
B:advertisement
C:replacement
D:advancement
A:retirement
B:advertisement
C:replacement
D:advancement
共用题干
Free Statins with Fast Food could Neutralize Heart Risk
Fast food outlets could provide statin drugs free of1so that customers can reduce the heart disease dangers of fatty food,researchers at Imperial College London 2in a new study.
Statins reduce the3of unhealthy“LDL” cholesterol in the blood. A wealth of trial data has proven them to be highly effective at lowering a person's heart attack4.
In a paper published in the American Journal of Cardiology,Dr Darrel Francis and colleagues calculate that the reduction in heart attack risk offered by a statin is5to offset the increase in heart attack risk from6a cheeseburger and drinking a milkshake.
Dr Francis,from the National Heart and Lung Institute at Imperial College London,who is the senior author of the study,said:“Statins don't cut out all of the7effects of cheeseburgers and French fries. It's better to avoid fatty food altogether. But we've worked out that in terms of your8of having a heart attack. Taking a statin can reduce your risk to more or less the same9 as a fast food meal increases it.”“It's ironic that people are free to take as many unhealthy condi-ments in fast food outlets as they10,but statins,which are beneficial to heart health,have to be prescribed. It makes sense to make risk-reducing statins available just as easily as the unhealthy condiments that are 11 free of charge. It would cost less than 5 pence per/u>12一not much different to a sachet of sugar.”Dr Francis said.
When people engage in risky behaviours like driving or smoking,they're encouraged to take13that lower their risk,like14a seatbelt or choosing cigarettes with filters.
Taking a statin is a rational way of15some of the risks of eating a fatty meal.
13._________
A: measures
B: care
C: advantages
D: turns
Free Statins with Fast Food could Neutralize Heart Risk
Fast food outlets could provide statin drugs free of1so that customers can reduce the heart disease dangers of fatty food,researchers at Imperial College London 2in a new study.
Statins reduce the3of unhealthy“LDL” cholesterol in the blood. A wealth of trial data has proven them to be highly effective at lowering a person's heart attack4.
In a paper published in the American Journal of Cardiology,Dr Darrel Francis and colleagues calculate that the reduction in heart attack risk offered by a statin is5to offset the increase in heart attack risk from6a cheeseburger and drinking a milkshake.
Dr Francis,from the National Heart and Lung Institute at Imperial College London,who is the senior author of the study,said:“Statins don't cut out all of the7effects of cheeseburgers and French fries. It's better to avoid fatty food altogether. But we've worked out that in terms of your8of having a heart attack. Taking a statin can reduce your risk to more or less the same9 as a fast food meal increases it.”“It's ironic that people are free to take as many unhealthy condi-ments in fast food outlets as they10,but statins,which are beneficial to heart health,have to be prescribed. It makes sense to make risk-reducing statins available just as easily as the unhealthy condiments that are 11 free of charge. It would cost less than 5 pence per/u>12一not much different to a sachet of sugar.”Dr Francis said.
When people engage in risky behaviours like driving or smoking,they're encouraged to take13that lower their risk,like14a seatbelt or choosing cigarettes with filters.
Taking a statin is a rational way of15some of the risks of eating a fatty meal.
13._________
A: measures
B: care
C: advantages
D: turns