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It is everywhere,as visible as it is vilified.From car parts to crisp packets,plastic has suffuse the Earth,and beyond-in 1969 Neil Armstrong planted a nylon Stars and Stripes on the moon.More than 8bn tonnes has been produced since the 1950s,enough to wrap the continents in cling film four times over.1 Untold tonnes end up as irretrievable ocean flotsam,which sunlight and salt fragment into microscopic pieces that attract toxins and may be gulped by creatures that become seafood Plastic weighs heavily on the mind,too.2 In Britain hatred of plastic unites the right-wing Daily Mail,the leftie Guardian,and the queen,who has banned plastic straws from her castles.But hold on.The little scientists know about plastic suggests that although it is the most noticeable pollutant it is far from the most harmful.Using less is at best a partial solution.a bet-ter answer is to collect more-especially in Asia The effects of plastic on nature and human health are hard to gauge.Most polymers are chemically inert.That makes them durable.3 It also makes them less likely to be a health risk to humans and beasts.As a pollutant,their impact is much lower than less tangible menaces.By one estimate,the environmental and social costs of plastic run to 9 139bn a year,chiefly from the greenhouse gases produced in its production and transport.The figure for farming is$3trn.Fertiliser run-off alone causes S 200bn-800bn worth of damage to the ocean,compared with S 13bn from plastic marine litter.Then look at the alternatives.A cotton tote bag must be used 131 times before its carbon footprint improves on that of a throwaway carrier bag This does not stop plastic from being a problem.4 Prohibition makes sense in poor places like Bangladesh and Kenya that lack proper waste-management systems.It is less useful in tidy France where rubbish collection works smoothly.It would be more effective for rich countries to shore up their recycling industries.They may have little choice in any case A carbon tax may spur recycling,which is less energy-intensive than producing virgin plastic Mandating minimum recycled content in plastic containers,as California has since 1991,is also a useful tool.Governments could exempt second-hand polymers from value-added tax;after all,the tax has already been paid on the fresh source material 5.Among the ten biggest plastic polluters,all but two are in developing Asia.Together,they account for two-thirds of the plastic spewed into the ocean.Of these,only China could afford Western-style waste-management in the near future.Others are just waking up to the problem;before plastic began piling up,it reasonably seemed less of a priority for governments.Bangladesh may be able to copy India which,despite its 1.3bn people,falls outside the top ten thanks to armies of ragpickers.The rest,like Vietnam or Thailand,may be too wealthy for raddiwallahs,yet too poor for sophisticated rubbish collection.The rich world should focus its attention-and resources,including charity-on chivvying them along.That is the surest way to stem the plastic tide
4选？
4选？
A.But bans and penalties on plastic bags in rich countries may be better for the conscience than for the environment
B.But by itself,the West will not solve the problem
C.It also makes them less likely to be a health risk to humans and beast
D.For some 79%of the plastic produced over the last 70 years has been thrown away,either into landfill sites or into the general environment
E.Nine in len Europeans wory about ts impat on eosystems thre in four fret that it can harm their own health
F.Only 9%was recydled 60%was dumped,mosty in aills s too often in the natural word
G.Researdn shows he wi De more pasic han tsh by weignt n he wold's oceans by 2050 and srawns are a major lador because the vast maoiy are never eydlede
B.But by itself,the West will not solve the problem
C.It also makes them less likely to be a health risk to humans and beast
D.For some 79%of the plastic produced over the last 70 years has been thrown away,either into landfill sites or into the general environment
E.Nine in len Europeans wory about ts impat on eosystems thre in four fret that it can harm their own health
F.Only 9%was recydled 60%was dumped,mosty in aills s too often in the natural word
G.Researdn shows he wi De more pasic han tsh by weignt n he wold's oceans by 2050 and srawns are a major lador because the vast maoiy are never eydlede
参考答案
参考解析
解析：空格上文指出这并不能阻止塑料成为一个问题。下文对比了穷国和富国在禁用塑料袋上的差异。孟加拉国、肯尼亚为代表的贫穷国家禁用塑料是有意义的。而法国等富国由于垃圾收集系统运转顺畅,这种做法就没那么有用了。由此可知,本句与上句成转折关系,且意思应该为富裕国家对塑料袋的禁用和处罚措施没有多大用处。故选[A]But bans and penalties on plastic bags in rich countries may be better for the conscience than for the environment.
更多 “It is everywhere,as visible as it is vilified.From car parts to crisp packets,plastic has suffuse the Earth,and beyond-in 1969 Neil Armstrong planted a nylon Stars and Stripes on the moon.More than 8bn tonnes has been produced since the 1950s,enough to wrap the continents in cling film four times over.1 Untold tonnes end up as irretrievable ocean flotsam,which sunlight and salt fragment into microscopic pieces that attract toxins and may be gulped by creatures that become seafood Plastic weighs heavily on the mind,too.2 In Britain hatred of plastic unites the right-wing Daily Mail,the leftie Guardian,and the queen,who has banned plastic straws from her castles.But hold on.The little scientists know about plastic suggests that although it is the most noticeable pollutant it is far from the most harmful.Using less is at best a partial solution.a bet-ter answer is to collect more-especially in Asia The effects of plastic on nature and human health are hard to gauge.Most polymers are chemically inert.That makes them durable.3 It also makes them less likely to be a health risk to humans and beasts.As a pollutant,their impact is much lower than less tangible menaces.By one estimate,the environmental and social costs of plastic run to 9 139bn a year,chiefly from the greenhouse gases produced in its production and transport.The figure for farming is$3trn.Fertiliser run-off alone causes S 200bn-800bn worth of damage to the ocean,compared with S 13bn from plastic marine litter.Then look at the alternatives.A cotton tote bag must be used 131 times before its carbon footprint improves on that of a throwaway carrier bag This does not stop plastic from being a problem.4 Prohibition makes sense in poor places like Bangladesh and Kenya that lack proper waste-management systems.It is less useful in tidy France where rubbish collection works smoothly.It would be more effective for rich countries to shore up their recycling industries.They may have little choice in any case A carbon tax may spur recycling,which is less energy-intensive than producing virgin plastic Mandating minimum recycled content in plastic containers,as California has since 1991,is also a useful tool.Governments could exempt second-hand polymers from value-added tax;after all,the tax has already been paid on the fresh source material 5.Among the ten biggest plastic polluters,all but two are in developing Asia.Together,they account for two-thirds of the plastic spewed into the ocean.Of these,only China could afford Western-style waste-management in the near future.Others are just waking up to the problem;before plastic began piling up,it reasonably seemed less of a priority for governments.Bangladesh may be able to copy India which,despite its 1.3bn people,falls outside the top ten thanks to armies of ragpickers.The rest,like Vietnam or Thailand,may be too wealthy for raddiwallahs,yet too poor for sophisticated rubbish collection.The rich world should focus its attention-and resources,including charity-on chivvying them along.That is the surest way to stem the plastic tide 4选？A.But bans and penalties on plastic bags in rich countries may be better for the conscience than for the environment B.But by itself,the West will not solve the problem C.It also makes them less likely to be a health risk to humans and beast D.For some 79%of the plastic produced over the last 70 years has been thrown away,either into landfill sites or into the general environment E.Nine in len Europeans wory about ts impat on eosystems thre in four fret that it can harm their own health F.Only 9%was recydled 60%was dumped,mosty in aills s too often in the natural word G.Researdn shows he wi De more pasic han tsh by weignt n he wold's oceans by 2050 and srawns are a major lador because the vast maoiy are never eydlede” 相关考题
考题
E）任务型阅读（共5小题，计10分）阅读下面的短文，根据短文内容，完成表格。（每空填1至3个词）China has decided to stop the use of free plastic bags. Supermarkets， shops and outlets(经销店) in China can’t offer plastic bags any more.Every year， people use too many plastic bags. They throw them here and there after they have used them. The government has done its best to deal with them but failed. While we offer quick service（服务） to customers， the plastic bags pollute water，earth and air， and they waste the oil. The government asks people to go back to carry cloth bags and use baskets when they go to buy something. The cloth bags and the baskets can be used again and again.Many months have passed. The environment has been improved a lot.ActionMake a decision to stop the use of 41.42.Supermarkets， shops and outletsAdvantageOffer43. service to customersDisadvantagePollute water， earth and air and waste44.What should we doGo back to carry cloth bags and use 45.41.__________
考题
AWhen you look at the sky at night，the moon looks bigger than the stars． In fact，the moon is much smaller than the stars．It is much smaller than the earth． But the moon is much closer to us than any star． That is why it looks so big． If you hold a coin close．to your eye，it looks big．If you look at it across the room，it looks small．The moon moves around the earth． It makes one trip in about four weeks． The moon looks flat(扁的)to us． But it is a round ball，like the earth．People once thought the moon had fire(火) on it． They thought the fire made it bright．Now we know the moon is like a mirror( 镜子 )． It gets its light from the sun Our sunlight comes from the sun，too: What is the sun? The sun is star． The stars we can see have their own light． There are many big stars we can-t see． Their light has burned out． Others are still bright，but they are so far away that we can-t see them． The sun looks bigger and much brighter than other stars because it is the nearest of all stars． The sun and the other stars we see are very hot，but the air around us saves us from(使------免于) the heat(热量) of the sun．The sun gives us light and warmth．It makes plants grow and leaves turn green． It makes life possible on our earth．It is a life-giving star．( )21． The moon looks bigger because__________ ．A． some stars are smaller than itB．it is between the sun and the earthC．it is the closest to the earthD．it is very bright
考题
Text 2 To understand how astrology works, we should first take a quick look at the sky. Although the stars are at enormous distances, they do indeed give the impression of being affixed to the inner surface of a great hollow sphere surrounding the earth. Ancient people, in fact, literally believed in the existence of such a celestial sphere. As the earth spins on its axis, the celestial sphere appears to turn about us each day, pivoting at points on a line with the earth's axis of rotation. This daily turning of the sphere carries the stars around the sky, causing most of them to rise and set, but they, and constellations they define, maintains fixed patterns on the sphere, just as the continent of Australian maintains its shape on a spinning globe of the earth. Thus the stars were called fixed stars.The motion of the sun along the ecliptic is, of course, merely a reflection of the revolution of the earth around the sun, but the ancients believed the earth was fixed and the sun had an independent motion of its own, eastward among the stars. The glare of sunlight hides the stars in daytime, but the ancients were aware that the stars were up there even at night, and the slow eastward motion of the sun around the sky, at the rate of about thirty degrees each month, caused different stars to be visible at night at different times of the year.The moon, revolving around the earth each month, also has an independent motion in the sky. The moon, however, changes its position relatively rapidly. Although it appears to rise and set each day, as does nearly everything else in the sky, we can see the moon changing position during as short an interval as an hour or so. The moon's path around the earth lies nearly in the same plane as the earth's path around the sun, so the moon is never seen very far from the ecliptic in the sky. There are five other objects visible to the naked eye that also appear to move in respect to the fixed background of stars on the celestial sphere. These are the planets Mercury, Venus, Mars, Jupiter, and the Saturn. All of them revolve around the sun in nearly the same plane as the earth does, so they, like the moon, always appear near the ecliptic. Because we see the planets from the moving earth, however, they behave in a complicated way, with their apparent motions on the celestial sphere reflection both their own independent motions around the sun and our motion as well.第26题：The ancient people believed that ________.[A] the earth was spinning on the axis of the sky[B] the sky was a hollow sphere spinning around the earth[C] the patterns of stars on the sky would never change[D] the stars around the sky were not stationary
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protective blanket 选择
Theatmosphereagainactsourprotectiveblanketon_____[A]stars[B]sun[C]earth[D]space
考题
It is not advisable to use nylon for alongside towing because it ______.A.is too expensive for everyday towing usageB.binds on the cleatsC.parts too readilyD.stretches too much
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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 planet that could support life might be a little bit smaller than the Earth.A:Right B:Wrong C:Not mentioned
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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 Kepler space telescope has been in service for 15 years.A:Right B:Wrong C:Not mentioned
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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 Earth is a planet orbiting in the Sun's habitable zone.A:Right B:Wrong C:Not mentioned
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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 new finding is based on a thorough study of 170,000 stars in the Milky Way.A:Right B:Wrong C:Not mentioned
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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 estimate of the number of planets that could support life is not very accurate.A:Right B:Wrong C:Not mentioned
考题
The long‐awaited Hubble Space Telescope,due（ ）orbit the Earth next March,will observe some of the oldest stars in the sky.
to
考题
It can be inferred that a car accident is often coupled with__________.A.a plastic surgeon
B.a companion
C.a risk
D.a fire
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第三篇Small but WiseOn December 14,NASA blasted a small but mighty telescope into space.The telescope is called WISE and is about as wide around as a trashcan.Don't let its small size fool you:WISE has a powerful digital camera,and it will be taking pictures of some of the wildest objects in the known universe,including asteroids,faint stars,blazing galaxies and giant clouds of dust where planets and stars are born."I'm very excited because we're going to be seeing parts of the universe that we haven't seen be- fore,"said Ned Wright,a scientist who directs the WISE project.Since arriving in space,the WISE telescope has been circling the Earth,held by gravity in a polar orbit (this means it crosses close to the north and south poles with each lap).Its camera is pointed outward,awayfrom the Earth,and WISE will snap a picture of a different part of the sky every 11 minutes.After six months it will have taken pictures across the entire sky.The pictures taken by WISE won't be like everyday digital photographs,however. WISE stands for "Wide-field Infrared Survey Explorer".As its name suggests,the WISE camera takes pictures of features that give off infrared radiation.Radiation is energy that travels as a wave.Visible light,including the familiar spectrum of light that be- comes visible in a rainbow,is an example of radiation.When an ordinary digital camera takes a picture of a tree,for example,it receives the waves of visible light that are reflected off the tree.When these waves enter the camera through the lens,they're processed by the camera,which then puts the image together.Waves of infrared radiation are longer than waves of visible light,so ordinary digital cameras don't see them,and neither do the eyes of human beings.Although invisible to the eye,longer infrared radiation can be detected as warmth by the skin.That's a key idea to why WISE will be able to see things other telescopes can't. Not everything in the universe shows up in visible light.Asteroids,for example, are giant rocks that float through space一but they absorb most of the light that reaches them.They don't reflect light,so they're difficult to see.But they do give off infrared radiation,so an infrared telescope like WISE will be able to produce images of them.During its mission WISE will take pictures of hundreds of thousands of asteroids.Brown dwarfs are another kind of deep-space objects that will show up in WISE's pictures.These ob- jects are "failed" stars一which means they are not massive enough to jump-start the same kind of reactions that power stars such as the sun.Instead,brown dwarfs simply shrink and cool down.They're so dim that they're almost impossible to see with visible light,but in the infrared spectrum they glow.Which of the following statements about asteroids is NOT true? A:The WISE telescope can catch and take pictures of them.B:They do not reflect light that reaches them.C:They float through space giving off visible light.D:They are invisible to ordinary cameras.
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第三篇Small but WiseOn December 14,NASA blasted a small but mighty telescope into space.The telescope is called WISE and is about as wide around as a trashcan.Don't let its small size fool you:WISE has a powerful digital camera,and it will be taking pictures of some of the wildest objects in the known universe,including asteroids,faint stars,blazing galaxies and giant clouds of dust where planets and stars are born."I'm very excited because we're going to be seeing parts of the universe that we haven't seen be- fore,"said Ned Wright,a scientist who directs the WISE project.Since arriving in space,the WISE telescope has been circling the Earth,held by gravity in a polar orbit (this means it crosses close to the north and south poles with each lap).Its camera is pointed outward,awayfrom the Earth,and WISE will snap a picture of a different part of the sky every 11 minutes.After six months it will have taken pictures across the entire sky.The pictures taken by WISE won't be like everyday digital photographs,however. WISE stands for "Wide-field Infrared Survey Explorer".As its name suggests,the WISE camera takes pictures of features that give off infrared radiation.Radiation is energy that travels as a wave.Visible light,including the familiar spectrum of light that be- comes visible in a rainbow,is an example of radiation.When an ordinary digital camera takes a picture of a tree,for example,it receives the waves of visible light that are reflected off the tree.When these waves enter the camera through the lens,they're processed by the camera,which then puts the image together.Waves of infrared radiation are longer than waves of visible light,so ordinary digital cameras don't see them,and neither do the eyes of human beings.Although invisible to the eye,longer infrared radiation can be detected as warmth by the skin.That's a key idea to why WISE will be able to see things other telescopes can't. Not everything in the universe shows up in visible light.Asteroids,for example, are giant rocks that float through space一but they absorb most of the light that reaches them.They don't reflect light,so they're difficult to see.But they do give off infrared radiation,so an infrared telescope like WISE will be able to produce images of them.During its mission WISE will take pictures of hundreds of thousands of asteroids.Brown dwarfs are another kind of deep-space objects that will show up in WISE's pictures.These ob- jects are "failed" stars一which means they are not massive enough to jump-start the same kind of reactions that power stars such as the sun.Instead,brown dwarfs simply shrink and cool down.They're so dim that they're almost impossible to see with visible light,but in the infrared spectrum they glow.It can be inferred from the last paragraph that brown dwarfs__________.A:give off infrared radiationB:are power stars like the sunC:become massive and activeD:are invisible to the WISE telescope
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第三篇Small but WiseOn December 14,NASA blasted a small but mighty telescope into space.The telescope is called WISE and is about as wide around as a trashcan.Don't let its small size fool you:WISE has a powerful digital camera,and it will be taking pictures of some of the wildest objects in the known universe,including asteroids,faint stars,blazing galaxies and giant clouds of dust where planets and stars are born."I'm very excited because we're going to be seeing parts of the universe that we haven't seen be- fore,"said Ned Wright,a scientist who directs the WISE project.Since arriving in space,the WISE telescope has been circling the Earth,held by gravity in a polar orbit (this means it crosses close to the north and south poles with each lap).Its camera is pointed outward,awayfrom the Earth,and WISE will snap a picture of a different part of the sky every 11 minutes.After six months it will have taken pictures across the entire sky.The pictures taken by WISE won't be like everyday digital photographs,however. WISE stands for "Wide-field Infrared Survey Explorer".As its name suggests,the WISE camera takes pictures of features that give off infrared radiation.Radiation is energy that travels as a wave.Visible light,including the familiar spectrum of light that be- comes visible in a rainbow,is an example of radiation.When an ordinary digital camera takes a picture of a tree,for example,it receives the waves of visible light that are reflected off the tree.When these waves enter the camera through the lens,they're processed by the camera,which then puts the image together.Waves of infrared radiation are longer than waves of visible light,so ordinary digital cameras don't see them,and neither do the eyes of human beings.Although invisible to the eye,longer infrared radiation can be detected as warmth by the skin.That's a key idea to why WISE will be able to see things other telescopes can't. Not everything in the universe shows up in visible light.Asteroids,for example, are giant rocks that float through space一but they absorb most of the light that reaches them.They don't reflect light,so they're difficult to see.But they do give off infrared radiation,so an infrared telescope like WISE will be able to produce images of them.During its mission WISE will take pictures of hundreds of thousands of asteroids.Brown dwarfs are another kind of deep-space objects that will show up in WISE's pictures.These ob- jects are "failed" stars一which means they are not massive enough to jump-start the same kind of reactions that power stars such as the sun.Instead,brown dwarfs simply shrink and cool down.They're so dim that they're almost impossible to see with visible light,but in the infrared spectrum they glow.It is true that infrared radiation_________.A:is not detectable to humansB:looks brighter than visible lightC:is visible light reflected off an objectD:has longer waves than those of visible light
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第三篇Small but WiseOn December 14,NASA blasted a small but mighty telescope into space.The telescope is called WISE and is about as wide around as a trashcan.Don't let its small size fool you:WISE has a powerful digital camera,and it will be taking pictures of some of the wildest objects in the known universe,including asteroids,faint stars,blazing galaxies and giant clouds of dust where planets and stars are born."I'm very excited because we're going to be seeing parts of the universe that we haven't seen be- fore,"said Ned Wright,a scientist who directs the WISE project.Since arriving in space,the WISE telescope has been circling the Earth,held by gravity in a polar orbit (this means it crosses close to the north and south poles with each lap).Its camera is pointed outward,awayfrom the Earth,and WISE will snap a picture of a different part of the sky every 11 minutes.After six months it will have taken pictures across the entire sky.The pictures taken by WISE won't be like everyday digital photographs,however. WISE stands for "Wide-field Infrared Survey Explorer".As its name suggests,the WISE camera takes pictures of features that give off infrared radiation.Radiation is energy that travels as a wave.Visible light,including the familiar spectrum of light that be- comes visible in a rainbow,is an example of radiation.When an ordinary digital camera takes a picture of a tree,for example,it receives the waves of visible light that are reflected off the tree.When these waves enter the camera through the lens,they're processed by the camera,which then puts the image together.Waves of infrared radiation are longer than waves of visible light,so ordinary digital cameras don't see them,and neither do the eyes of human beings.Although invisible to the eye,longer infrared radiation can be detected as warmth by the skin.That's a key idea to why WISE will be able to see things other telescopes can't. Not everything in the universe shows up in visible light.Asteroids,for example, are giant rocks that float through space一but they absorb most of the light that reaches them.They don't reflect light,so they're difficult to see.But they do give off infrared radiation,so an infrared telescope like WISE will be able to produce images of them.During its mission WISE will take pictures of hundreds of thousands of asteroids.Brown dwarfs are another kind of deep-space objects that will show up in WISE's pictures.These ob- jects are "failed" stars一which means they are not massive enough to jump-start the same kind of reactions that power stars such as the sun.Instead,brown dwarfs simply shrink and cool down.They're so dim that they're almost impossible to see with visible light,but in the infrared spectrum they glow.What is so special about WISE?A:It is as small as a trashcan.B:It is small in size but carries a large camera.C:Its digital camera can help astronomers to see the unknown space.D:Never before has a telescope carried a digital camera in space.
考题
Uncle Sam often wears tall hat，________and the stars and stripes of the American flag.A.dark hair
B.a bow tie
C.a box
D.a shirt
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Which two statements are true about MLP interleaving？ （）A、 It fragments and encapsulates all packets in a fragmentation header.B、 Packets smaller than the fragmentation size are interleaved between the fragments of thelarger packets.C、 Packets larger than the fragmentation size are always fragmented， and cannot be interleaved，even if the traffic is voice traffic.D、 It fragments and encapsulates packets that are longer than a configured size， but does not encapsulate smaller packets inside a fragmentation header.
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单选题The sentence “Our planet has shrunk” underlined in Paragraph 1 means that.A
the earth has become physically smallerB
the more advanced ways of traveling has made the distance between countries shorterC
the traditional concept of our planet has become out-of-dateD
modern means of communication has made it much easier for people to communicate with each other from different parts of the world
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单选题The sentence “Our planet has shrunk” underlined in Paragraph 1 means that __________.A
the earth has become physically smallerB
the more advanced ways of traveling has made the distance between countries shorterC
the traditional concept of our planet has become out-of-dateD
modern means of communication has made it much easier for people to communicate with each other from different parts of the world
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单选题Compared to manila line,size for size, nylon line（）.A
has less strength than manila lineB
has more strength than manila lineC
is equivalent to manila lineD
will rot quicker than manila line
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单选题From the last paragraph the author tells us that ______.A
economy is the only reason for small car’s popularity.B
the size of a car also does matter to people in their 20sC
Honda is better than Suburban in terms of quality.D
small car already has been popular for 10 years.
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单选题Which statement is TRUE about nylon line?（）A
Manila line will usually last longer than nylon lineB
Nylon line is excellent for use in alongside towingC
A normal safe working load will stretch nylon line 50%D
Nylon stoppers should be used with nylon line
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单选题Even most imaginative people have to admit that _____.A
human societies are as advanced as those on some other planetsB
planets other than Earth are not suitable for life like ours to stayC
it is difficult to distinguish between organic parts and inorganic parts of the human bodyD
organisms are more creative than machines
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单选题The max effluent of the oil content from a ship of 400 tons gross tonnage and above other than an oil tanker is（）.A
less than 100 parts per millionB
more than 100 parts per millionC
at least 100 parts per millionD
100 parts per million
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单选题Even most imaginative people have to admit that______.A
human societies are as advanced as those on some other planetsB
planets other than Earth are not suitable for life like ours to stayC
it is difficult to distinguish between organic parts and inorganic parts of the human bodyD
organisms are more creative than machines
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单选题The universe has more than 100 billion separate systems of stars and gas known as _____.A
galleriesB
gangstersC
galaxiesD
garments
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