共用题干第三篇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
共用题干
第三篇
Small but Wise
On 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,away
from 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.
第三篇
Small but Wise
On 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,away
from 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 radiation
B:are power stars like the sun
C:become massive and active
D:are invisible to the WISE telescope
A:give off infrared radiation
B:are power stars like the sun
C:become massive and active
D:are invisible to the WISE telescope
参考解析
解析：由文章前两段内容可知，这个太空望远镜携带的数码相机可以拍到我们未知的宇宙里 的众多物体，它将使人类看到宇宙中的未知部分，故选C。
这个太空望远镜其实是个广视场红外线探测器（Wide-field Infrared Survey Explorer)，它 能拍到产生红外线辐射的物体，故选B。
由文章第六段内容可知，红外线辐射波比可见光的波长更长，因此普通的相机和肉眼 都是看不到它们的，但是红外线波可由皮肤感知，故本题选D。
由文章第七段第二、三句“Not everything in the universe shows up in visible light.Asteroids , for example...”可知，不是所有的物体都是以可见光的形式被发现的，小行星就是一 例，它们发出红外线，太空望远镜WISE可以感测到，故选C。
由最后一段内容可知，棕矮星能够被WISE探测到，说明它们发射的光不是可见光，而 是红外线波，故选A。
这个太空望远镜其实是个广视场红外线探测器（Wide-field Infrared Survey Explorer)，它 能拍到产生红外线辐射的物体，故选B。
由文章第六段内容可知，红外线辐射波比可见光的波长更长，因此普通的相机和肉眼 都是看不到它们的，但是红外线波可由皮肤感知，故本题选D。
由文章第七段第二、三句“Not everything in the universe shows up in visible light.Asteroids , for example...”可知，不是所有的物体都是以可见光的形式被发现的，小行星就是一 例，它们发出红外线，太空望远镜WISE可以感测到，故选C。
由最后一段内容可知，棕矮星能够被WISE探测到，说明它们发射的光不是可见光，而 是红外线波，故选A。
相关考题：
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共用题干Black HolesMost scientists agree that black holes exist but are nearly impossible to locate.A black hole in the universe is not a solid object,like a planet,but it is shaped like a sphere（球体）. Astronomers（天文学家）think that at the center of a black hole there is a single point in space with infinite（无限的）density（稠密）.This single point is called a singularity（奇点）. If the singularity theory is correct,it means that when a massive star collapses,all the material in it disappears into the singularity.The center of a black hole would not really be a hole at all,but an infinitely dense point.Anything that crosses the black hole is pulled in by its great gravity.Although black holes do exist,they are difficult to observe.These are the reasons.No light or anything else comes out of black holes.As a result,they are invisible to a telescope.In astronomical terms,black holes are truly tiny.For example,a black hole formed by the collapse of a giant star would have an event horizon（视界）only 18 miles across.The nearest black holes would be dozens of light years away from Earth.One light year is about 6 trillion（万亿）miles. Even the most powerlul telescopes could not pick out an object so small at such a great distance.In 1994 the Hubble Space Telescope provided evidence that black holes exist.There are still answers to be found,however,so black holes remain one of the mysteries of the universe.The Hubble Space Telescope helps scientists to understand the nature of the universe.A:Right B:Wrong C:Not mentioned
根据下面资料，回答"Hi there. How′ s it going?" "Oh, fine. Fine. How about this weather, huh?" "Well, I guess we can always use the rain." What is that? This story? Oh, just a little look at small talk. You know, those seemingly meaningless conversations you have dozens of times a day. Maybe you′re waiting for the elevator, or in a line at the bank. It all seems pretty trivial. Idle chatter about traffic doesn′t do much more than fill the air with empty words that are quickly forgotten. But you should know that small talk actually has a big place in our lives. Pat Oliver, assistant professor on arts, says that, "Left unchecked, small talk can be an invasion. It′ s so powerful. It does something to you." "Every morning after spending an hour and a half on the freeway I start the day with small talk with my secretary," Oliver says, "If I don′t make small connection with another person, I can′ t work." What causes it? As a rule, you′re either trying to force something into your life, or you′re using conversation as an invisible force field to keep them out. You can be wanting to connect with another person, and small talk is your introduction to more meaning conversation. The way people use small talk is usually determined by where they happen to beat the time. Take the elevator, for instance. Now there′ s prime territory. Nobody knows anyone and there′ s no reason to start a conversation, but invariably, someone does. "Making conversation in such peaceful social settings," according to Oliver, "can confirm your territory. It′s a way of feeling liked and accepted." The topics of small talk don′t matter. In fact, you don′t want anything more taxing than the weather or the traffic. It′ s non-threatening talk in a threatening situation. However, the rules change quickly when you′re with lots of people doing lots of talking. Let′ s say you′ re at a party. Now it′ s time to use small talk as a way of making others feel more comfortable around you, so don′ t look silly standing by the food table alone all night. According to the author, small talk is often used _____________.A.to invade other' s private affairsB.to share a secret between intimate friendsC.to open and maintain channels of communicationD.to protect one' s own privacy
根据下面资料，回答"Hi there. How′ s it going?" "Oh, fine. Fine. How about this weather, huh?" "Well, I guess we can always use the rain." What is that? This story? Oh, just a little look at small talk. You know, those seemingly meaningless conversations you have dozens of times a day. Maybe you′re waiting for the elevator, or in a line at the bank. It all seems pretty trivial. Idle chatter about traffic doesn′t do much more than fill the air with empty words that are quickly forgotten. But you should know that small talk actually has a big place in our lives. Pat Oliver, assistant professor on arts, says that, "Left unchecked, small talk can be an invasion. It′ s so powerful. It does something to you." "Every morning after spending an hour and a half on the freeway I start the day with small talk with my secretary," Oliver says, "If I don′t make small connection with another person, I can′ t work." What causes it? As a rule, you′re either trying to force something into your life, or you′re using conversation as an invisible force field to keep them out. You can be wanting to connect with another person, and small talk is your introduction to more meaning conversation. The way people use small talk is usually determined by where they happen to beat the time. Take the elevator, for instance. Now there′ s prime territory. Nobody knows anyone and there′ s no reason to start a conversation, but invariably, someone does. "Making conversation in such peaceful social settings," according to Oliver, "can confirm your territory. It′s a way of feeling liked and accepted." The topics of small talk don′t matter. In fact, you don′t want anything more taxing than the weather or the traffic. It′ s non-threatening talk in a threatening situation. However, the rules change quickly when you′re with lots of people doing lots of talking. Let′ s say you′ re at a party. Now it′ s time to use small talk as a way of making others feel more comfortable around you, so don′ t look silly standing by the food table alone all night. According to the author, at a big party, small talk is used with the purpose of_____________.A.making both others and yourself feel at easeB.excluding those you don't like from joining youC.keeping your voice low so only your friends can hear youD.comforting those who feel lonely
根据下面资料，回答"Hi there. How′ s it going?" "Oh, fine. Fine. How about this weather, huh?" "Well, I guess we can always use the rain." What is that? This story? Oh, just a little look at small talk. You know, those seemingly meaningless conversations you have dozens of times a day. Maybe you′re waiting for the elevator, or in a line at the bank. It all seems pretty trivial. Idle chatter about traffic doesn′t do much more than fill the air with empty words that are quickly forgotten. But you should know that small talk actually has a big place in our lives. Pat Oliver, assistant professor on arts, says that, "Left unchecked, small talk can be an invasion. It′ s so powerful. It does something to you." "Every morning after spending an hour and a half on the freeway I start the day with small talk with my secretary," Oliver says, "If I don′t make small connection with another person, I can′ t work." What causes it? As a rule, you′re either trying to force something into your life, or you′re using conversation as an invisible force field to keep them out. You can be wanting to connect with another person, and small talk is your introduction to more meaning conversation. The way people use small talk is usually determined by where they happen to beat the time. Take the elevator, for instance. Now there′ s prime territory. Nobody knows anyone and there′ s no reason to start a conversation, but invariably, someone does. "Making conversation in such peaceful social settings," according to Oliver, "can confirm your territory. It′s a way of feeling liked and accepted." The topics of small talk don′t matter. In fact, you don′t want anything more taxing than the weather or the traffic. It′ s non-threatening talk in a threatening situation. However, the rules change quickly when you′re with lots of people doing lots of talking. Let′ s say you′ re at a party. Now it′ s time to use small talk as a way of making others feel more comfortable around you, so don′ t look silly standing by the food table alone all night. "Small talk", as interpreted by the author,_____________.A.has no real function in communication at allB.is usually meaningless and therefore uselessC.is not as idle as it may seem to beD.is restricted to certain topics only
根据下列内容，回答211-215题。"Hi there. How's it going? ""Oh, fine. Fine. How about this weather, huh? ""Well, I guess we can alway use the rain."What is that?This story?Oh, just a little look at small talk. You know, those seeminglymeaningless conversations you have dozens of times a day. Maybe you're waiting for the elevator,or in a line at the bank. It all seems pretty trivial. Idle chatter about traffic doesn't do much morethan fill the air with empty words that are quickly forgotten. But you should know that small talkactually has a big place in our lives.Pat Oliver, assistant professor on arts, says that, "Left unchecked, small talk can be aninvasion. It's so powerful. It does something to you."" Every morning after spending an hour and ahalf on the freeway I start the day with small talk with my secretary, "Oliver says, "If I don't makesmall connection with another person, I can't work."What causes it?As a rule, you're either trying to force something into your life, or you'reusing conversation as an invisible force field to keep them out. You can be wanting to connect withanother person, and small talk is your introduction to more meaning conversation. The way peopleuse small talk is usually determined by where they happen to be at the time.Take the elevator, for instance. Now there's prime territory. Nobody knows anyone and there'sno reason to start a conversation, but invariably, someone does."Making conversation in suchpeaceful social settings," according to Oliver,"can confirm your territory. It's a way of feelingliked and accepted."The topics of small talk don't matter. In fact, you don't want anything more taxing than theweather or the traffic. It's non-threatening talk in a threatening situation. However, the ruleschange quickly when you're with lots of people doing lots of talking.Let's say you're at a party. Now it's time to use small talk as a way of making others feelmore comfortable around you, so don't look silly standing by the food table alone all night."Small talk", as interpreted by the author,__________.A.has no real function in communication at allB.is usually meaningless and therefore uselessC.is not as idle as it may seem to beD.is restricted to certain topics only
共用题干第二篇Explorer of the Extreme DeepOceans cover more than two-thirds of our planet.Yet,just a small fraction of the underwater world has been explored.Now,Scientists at the Woods Hole Oceanographic Institution(WHOI)in Massachusetts are building an underwater vehicle that will carry explorers as deep as 6,500 meters (21,325.5 feet).The new machine,known as a manned submersible or human-operated vehicle (HOV),will replace another one named Alvin which has an amazing record of discovery,playing a key role in various important and famous undersea expeditions.Alvin has been operating for 40 years but can go down only 4,500 meters(14,763.8 feet).It's about time for an upgrade,WHOI researchers say.Alvin was launched in 1964.Since then,Alvin has worked between 200 and 250 days a year, says Daniel Fornari,a marine geologist and director of the Deep Ocean Exploration Institute at WHOI.During its lifetime,Alvin has carried some 12,000 people on a total of more than 3,000 dives.A newer,better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries,Fornari says.It might also make the job of exploration a little easier."We take so much for granted on land."Fornari says."We can walk around and see with our eyes how big things are.We can see colors,special arrangements."Size-wise,the new HOV will be similar to Alvin.It'll be about 37 feet long. The setting area inside will be a small sphere,about 8 feet wide,like Alvin.It'll carry a pilot and two passengers.It will be just as maneuverable.In most other ways,it will give passengers more opportunities to enjoy the view,for one thing. Alvin has only three windows,the new vehicle will have five,with more overlap so that the passengers and the pilot can see the same thing.Alvin can go up and down at a rate of 30 meters every second,and its maximum speed is 2 knots(about 2.3 miles per hour),while the new vehicle will be able to ascend and descend at 44 meters per second.It'll reach speeds of 3 knots,or 3.5 miles per hour.“…a world that is still full of mysteries"refers to_______. A:the earthB:out spaceC:the oceanD:Mars
共用题干第三篇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.
共用题干第二篇Explorer of the Extreme DeepOceans cover more than two-thirds of our planet.Yet,just a small fraction of the underwater world has been explored.Now,Scientists at the Woods Hole Oceanographic Institution(WHOI)in Massachusetts are building an underwater vehicle that will carry explorers as deep as 6,500 meters (21,325.5 feet).The new machine,known as a manned submersible or human-operated vehicle (HOV),will replace another one named Alvin which has an amazing record of discovery,playing a key role in various important and famous undersea expeditions.Alvin has been operating for 40 years but can go down only 4,500 meters(14,763.8 feet).It's about time for an upgrade,WHOI researchers say.Alvin was launched in 1964.Since then,Alvin has worked between 200 and 250 days a year, says Daniel Fornari,a marine geologist and director of the Deep Ocean Exploration Institute at WHOI.During its lifetime,Alvin has carried some 12,000 people on a total of more than 3,000 dives.A newer,better versions of Alvin is bound to reveal even more surprises about a world that is still full of mysteries,Fornari says.It might also make the job of exploration a little easier."We take so much for granted on land."Fornari says."We can walk around and see with our eyes how big things are.We can see colors,special arrangements."Size-wise,the new HOV will be similar to Alvin.It'll be about 37 feet long. The setting area inside will be a small sphere,about 8 feet wide,like Alvin.It'll carry a pilot and two passengers.It will be just as maneuverable.In most other ways,it will give passengers more opportunities to enjoy the view,for one thing. Alvin has only three windows,the new vehicle will have five,with more overlap so that the passengers and the pilot can see the same thing.Alvin can go up and down at a rate of 30 meters every second,and its maximum speed is 2 knots(about 2.3 miles per hour),while the new vehicle will be able to ascend and descend at 44 meters per second.It'll reach speeds of 3 knots,or 3.5 miles per hour.In what aspects are the new HOV and Alvin different?A:Offering better views.B:Speed.C:Size.D:Both A and B.
共用题干第三篇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
共用题干Batteries Built by VirusesWhat do chicken pox,the common cold,the flu,and AIDS have in common?They're all diseases caused by viruses,tiny microorganisms that can pass from person to person. It's no wonder that when most people think about viruses,finding ways to steer clear of viruses is what's on people's minds.Not everyone runs from the tiny disease carriers,though. In Cambridge,Massachu- setts,scientists have discovered that some viruses can be helpful in an unusual way. They are putting viruses to work,teaching them to build some of the world's smallest rechargeable batteries.Viruses and batteries may seem like an unusual pair,but they're not so strange for engi-neer Angela Beicher,who first came up with the idea. At the Massachusetts Institute ofTechnology(MIT)in Cambridge,she and her collaborators bring together different areas of science in new ways.In the case of the virus-built batteries,the scientists combine what they know about biology,technology and production techniques.Beicher's team includes Paula Hammond,who helps put together the tiny batteries,andYet-Ming Chiang,an expert on how to store energy in the form of a battery.“We're working on things we traditionally don't associate with nature，”says Hammond.Many batteries are already pretty small. You can hold A,C and D batteries in your hand. The coin-like batteries that power watches are often smaller than a penny. However, every year,new electronic devices like personal music players or cell phones get smaller than the year before. As these devices shrink,ordinary batteries won't be small enough to fit in-side.The ideal battery will store a lot of energy in a small package. Right now,Belcher's model battery,a metallic disk completely built by viruses,looks like a regular watch battery. But inside,its components are very small一so tiny you can only see them with a powerful microscope.How small are these battery parts?To get some idea of the size,pluck one hair from your head. Place your hair on a piece of white paper and try to see how wide your hair is一 pretty thin,right?Although the width of each person's hair is a bit different,you could probably fit about 10 of these virus-built battery parts,side to side,across one hair. These micro-batteries may change the way we look at viruses.How tiny is one battery part?A: Its width is one tenth of a hair. B: It equals the width of a hair.C: It is as thin as a piece of paper. D: Its width is too tiny to measure.
共用题干第三篇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.The camera on WISE_________.A:is equipped with expensive computersB:produces images of objects giving off infrared radiationC:reflects light visible to the human eyesD:is similar to an ordinary digital camera
共用题干第三篇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.
共用题干Black HolesMost scientists agree that black holes exist but are nearly impossible to locate.A black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere（球体）. Astronomers（天文学家）think that at the center of a black hole there is a single point in space with infinite（无限的）density（稠密）.This single point is called a singularity（奇点）.If the singularity theory is correct,it means that when a massive star collapses,all the material in it disappears into the singularity.The center of a black hole would not really be a hole at all,but an infinitely dense point.Anything that crosses the black hole is pulled in by its great gravity.Although black holes do exist,they are difficult to observe.These are the reasons.No light or anything else comes out of black holes.As a result,they are invisible to a telescope.In astronomical terms,black holes are truly tiny.For example,a black hole formed by the collapse of a giant star would have an event horizon（视界）only 18 miles across.The nearest black holes would be dozens of light years away from Earth.One light year is about 6 trillion（万亿）miles. Even the most powerful telescopes could not pick out an object so small at such a great distance.In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are still answers to be found,however,so black holes remain one of the mysteries of the universe.Black holes are part of space.A:Right B:Wrong C:Not mentioned
共用题干Black HolesMost scientists agree that black holes exist but are nearly impossible to locate.A black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere（球体）. Astronomers（天文学家）think that at the center of a black hole there is a single point in space with infinite（无限的）density（稠密）.This single point is called a singularity（奇点）.If the singularity theory is correct,it means that when a massive star collapses,all the material in it disappears into the singularity.The center of a black hole would not really be a hole at all,but an infinitely dense point.Anything that crosses the black hole is pulled in by its great gravity.Although black holes do exist,they are difficult to observe.These are the reasons.No light or anything else comes out of black holes.As a result,they are invisible to a telescope.In astronomical terms,black holes are truly tiny.For example,a black hole formed by the collapse of a giant star would have an event horizon（视界）only 18 miles across.The nearest black holes would be dozens of light years away from Earth.One light year is about 6 trillion（万亿）miles. Even the most powerful telescopes could not pick out an object so small at such a great distance.In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are still answers to be found,however,so black holes remain one of the mysteries of the universe.The Hubble Space Telescope helps scientists to understand the nature of the universe.A:Right B:Wrong C:Not mentioned
共用题干A Star Is Born1 The VLT (Very Large Telescope) is the world's largest telescope（望远镜）and is taking astronomers（天文学家） further back to the Big Bang than they ever thoughtpossible.Located 2,600 metres up in the Chilean Andes,it has four huge mirrors,each about the size of a London bus.The VLT is so powerful it can spot a burning match 10,000 kilometres away.2 This astonishing power will allow astronomers to see events in space from the birth of stars to the collision（碰撞）of galaxies（星系）on the edge of the cosmos（宇宙）.The VLT is giving astronomers their best-ever view of the cosmos.The power of the VLT to see the smallest detail at the furthest distances makes its designers amazed.3 Take the case of Eta Carinae,one of the most explosive stars in the universe.This star produces ultraviolet laser rays（紫外线）and it will destroy itself in a few million years' time. It is five times brighter than the sun and when it explodes it is going to be a sight worth waiting for!4 But it is at distances of millions,even billions,of light years that the VLT really shows its power. The VLT can detect light that set out on its journey before the earth even existed. This gives astronomers their first-ever detailed views of events that took place in the earliest days of the cosmos.5 In other words,the VLT is a kind of a time machine.It takes astronomers back to a time when complete galaxies crashed into each other. The effects of these past collisionscan now be seen by scientists,and astronomers believe the telescope will reveal more about these exciting' events in the years to come.One day,we might be able to say we have traveled back to the beginning of time,and we will have a much clearer picture of how our planet was born.Scientists believe the VLT will tell us more about_________.A:its detecting powerB:millions of light years away in spaceC:the location of the VLTD:as an exampleE:the birth of the earthF:the rotation of the earth
If A small business customer has more sophisticated needs, which Cisco router portfolio would be the best choice?（）A、integrated services routersB、small business routersC、7000 series routersD、small business pro routers
A System p customer is planning to implement virtualization and is concerned about how to respond to an increased workload and what limitations there are for very small workloads. Which of the following describes the minimum size for an LPAR and the minimum amount that can be transferred from on LPAR to another（）A、Smallest partition 10% of all available processors， as small as 1% of all available processors may be transferred.B、Smallest partition 10% of a processor， as small 1% of a processor may be transferred.C、Smallest partition one processor， as small 1% of a processor may be transferred.D、Smallest partition one core， as small 10% of a processor may be transferred.
A customer’s small heterogeneous enterprise has grown over time to more than 500 client systems， and the administrator cannot add new servers to the management database. Which of the following is the most likely source of the problem？（）A、The management server has reached its size limitation.B、Additional agent licenses must be purchased.C、The CPU and Memory requirements need to be upgraded.D、The default JET database has reached its size limitation.
单选题According to this passage, _____.Athe game plan for keeping brain cells sparking doesn’t work for everyoneBDr. Small’s memory tests can show you what to do about brain agingCDr. Small’s advice can help us fight brain aging effectivelyDour brains can reconstruct memories themselves
单选题A small light tackle with blocks of steel or wood that is used for miscellaneous small jobs is called a（）.Asnatch blockBthreefold purchaseChandy-billyDchockablock