1
When we look at the sky and see a bright light moving quickly across it or coming towards the earth, we talk about seeing a “shooting star” or a “falling star”. These moving lights are not, in fact, stars at all. They are small pieces of matter from outer space, which burn up as they enter the Earth’s atmosphere. The correct name of them is meteoroids. Any pieces that make it to the Earth’s surface without completely burning up are known as meteorites. A meteor is actually the name given to the light we see when a meteoroid is burning up.
When a meteorite hits the Earth at speeds between 11 and 72 kilometers a second, it can do amazing damage. A very large meteorite could knock the earth out of its orbit. If this happened, all life on Earth would probably become extinct(灭绝). The path we follow around the Sun would change and as a result the Earth would become either much hotter or much colder. This change in temperature would affect sea levels and the amount of water in rivers. There would either be huge floods, which would cover most of the land with water, or the oceans would dry up and there would be a drought, which means a long period of time without rain. Either way, nothing could survive. If a large meteorite landed in the sea it would almost certainly cause tsunamis, which would race towards the land, destroying everything in their paths.
Although it is unlikely the Earth will be struck by a meteorite large enough to do that kind of damage, there is evidence of fairly large meteorites hitting the Earth in the past. In 1908 a large area of forest in Tunguska, Siberia was destroyed by a meteorite that came apart just before it hit the ground. The moon, however, has about three billion craters陨石坑caused by meteorites impacting影响 its surface. The reason more meteorites have reached the surface of the moon than the surface of the Earth is that the moon does not have enough atmosphere for the meteorites to burn up in. some of the meteorites that have reached the Earth’s surface have done considerable damage. Some scientists believe it was a change of climate caused by meteorites hitting the Earth that resulted in the extinction of the dinosaurs and other large prehistoric animals.
Scientists are especially interested in meteorites because they contain information about the solar system. It is widely believed by scientists that most meteorites are produced by collisions(碰撞) between asteroids (small planets). These collisions probably happened many billions of years ago. This means the physical and chemical structure of a meteorite can give scientists information about the early days of the universe.
【小题1】 The story is about ___.
A. floods caused by meteors
B. matter from outer space
C. life on Earth millions of years ago
D. meteorites that have damaged the moon
【小题2】 The Earth has ___.
A. three billion craters
B. fewer craters than the moon
C. more craters than the moon
D. a thinner atmosphere than the moon
【小题3】 Some scientists believe the dinosaurs became extinct because ___.
A. they were hit by meteors
B. meteorites landed on their nests
C. meteorites landed and changed the climate
D. they could no longer breathe the atmosphere
【小题4】 Meteors are ___.
A. small planets
B. the same as asteroids
C. from broken parts of asteroids
D. the light we see when meteoroids hit our atmosphere
高三英语简单题
1
When we look at the sky and see a bright light moving quickly across it or coming towards the earth, we talk about seeing a “shooting star” or a “falling star”. These moving lights are not, in fact, stars at all. They are small pieces of matter from outer space, which burn up as they enter the Earth’s atmosphere. The correct name of them is meteoroids. Any pieces that make it to the Earth’s surface without completely burning up are known as meteorites. A meteor is actually the name given to the light we see when a meteoroid is burning up.
When a meteorite hits the Earth at speeds between 11 and 72 kilometers a second, it can do amazing damage. A very large meteorite could knock the earth out of its orbit. If this happened, all life on Earth would probably become extinct(灭绝). The path we follow around the Sun would change and as a result the Earth would become either much hotter or much colder. This change in temperature would affect sea levels and the amount of water in rivers. There would either be huge floods, which would cover most of the land with water, or the oceans would dry up and there would be a drought, which means a long period of time without rain. Either way, nothing could survive. If a large meteorite landed in the sea it would almost certainly cause tsunamis, which would race towards the land, destroying everything in their paths.
Although it is unlikely the Earth will be struck by a meteorite large enough to do that kind of damage, there is evidence of fairly large meteorites hitting the Earth in the past. In 1908 a large area of forest in Tunguska, Siberia was destroyed by a meteorite that came apart just before it hit the ground. The moon, however, has about three billion craters陨石坑caused by meteorites impacting影响 its surface. The reason more meteorites have reached the surface of the moon than the surface of the Earth is that the moon does not have enough atmosphere for the meteorites to burn up in. some of the meteorites that have reached the Earth’s surface have done considerable damage. Some scientists believe it was a change of climate caused by meteorites hitting the Earth that resulted in the extinction of the dinosaurs and other large prehistoric animals.
Scientists are especially interested in meteorites because they contain information about the solar system. It is widely believed by scientists that most meteorites are produced by collisions(碰撞) between asteroids (small planets). These collisions probably happened many billions of years ago. This means the physical and chemical structure of a meteorite can give scientists information about the early days of the universe.
【小题1】 The story is about ___.
A. floods caused by meteors
B. matter from outer space
C. life on Earth millions of years ago
D. meteorites that have damaged the moon
【小题2】 The Earth has ___.
A. three billion craters
B. fewer craters than the moon
C. more craters than the moon
D. a thinner atmosphere than the moon
【小题3】 Some scientists believe the dinosaurs became extinct because ___.
A. they were hit by meteors
B. meteorites landed on their nests
C. meteorites landed and changed the climate
D. they could no longer breathe the atmosphere
【小题4】 Meteors are ___.
A. small planets
B. the same as asteroids
C. from broken parts of asteroids
D. the light we see when meteoroids hit our atmosphere
高三英语简单题查看答案及解析
If you look at the night sky, you’ll often see stars moving very quickly. In fact, they move much more quickly than they should according to their size and the laws of physics.
Scientists do not completely understand why the speed of these stars is so high. But many believe the reason is that much of the universe is made of something called “dark matter”. Groups of stars called galaxies, such as the Milky Way, might even be made up of 90 percent dark matter.
How much something weighs depends on where it is. The same object weighs only half as much on Mars as it does on Earth and almost three times as much on Jupiter. So scientists prefer to talk about the mass (质量) of something rather than how much it weighs, because mass does not change. They can work out the mass of galaxies by measuring the distance between them and the speed they move at.
Recently, Jorge Peñarrubia, a senior academic at Edinburgh University, UK, and his team discovered something interesting: The mass of the Milky Way is only half as much as the mass of another nearby galaxy, Andromeda. This seems strange, and dark matter may explain why.
Finding out more about dark matter could help us understand how the universe began, but this is not easy. Lots of scientists with different types of expert knowledge are working on the problem.
We can’t see dark matter, it’s very difficult to measure and we can’t find out its mass. Unlike stars, dark matter doesn’t produce or reflect light. But we can make a good guess that it is there because of the way things move and the way light bends. Experts now think dark matter may be very different from the matter that we find on Earth. There may also be five times as much dark matter in the universe as ordinary matter.
1.Something that weighs 15kg on Earth weighs about ________ on Mars and ________ on Jupiter.
A. 7.5 kg, 45 kg B. 30 kg, 45 kg C. 45 kg, 7.5 kg D. 5 kg, 30 kg
2.The author mentions the masses of the Milky Way and Andromeda mainly to ________.
A. explain why the same object has a different weight on different stars
B. compare the distance between the Milky Way and Andromeda
C. show that studying dark matter could help to answer some scientific questions
D. support the idea that scientists prefer to talk about mass instead of weight
3.Dark matter is difficult to investigate because ________.
A. it travels at a very fast speed
B. we can’t see where it is or measure its mass
C. it’s hard to measure the light it produces and reflects
D. it is much bigger than ordinary matter in size
4.According to the text, dark matter ________.
A. could accelerate the speed of stars
B. could lessen the mass of objects in galaxies
C. makes up the entire universe and its stars
D. may help us identify the origins of the universe
高三英语阅读理解中等难度题查看答案及解析
— The movie starts at 8:30, and we can have a quick bite before we go.
— . See you at 8:10.
A. So long B. Sounds great C. Up to you D. Have a good time
高三英语单项填空中等难度题查看答案及解析
—The movie starts at 8:30,and we can have a quick bite before we go.
—_________.See you at 8:10.
A. So long B. Sounds great
C. Good luck D.Have a good time
高三英语其他题中等难度题查看答案及解析
—The movie starts at 8:30,and we can have a quick bite before we go_________
--.See you at 8:10
A. So long B. Sounds great
C. Good luck D. Have a good time
高三英语单项填空中等难度题查看答案及解析
Most of us have looked up at the stars that fill the night sky and wondered whether we’re alone in the universe. Indeed, the question of whether there’ s life out there has been something humankind ’s been asking itself for countless years. But thanks to China’s Five-hundred-meter Aperture Spherical Telescope (FAST), the answer to this question may come a lot sooner than we expected.
The telescope has a huge round reflector, which measures 500 meters across and has a perimeter(周长)of 1.6 kilometers. Because of its great size, it would have been both difficult and inefficient to get FAST to move like a regular telescope. Instead, FAST’s designers came up with a great solution: its surface is made up of 4450 panels which can be individually adjusted. This clever design feature allows scientists to detect radio signals from any angle with a great degree of accuracy. “Panels can change their positions through connected wires and parallel (关联的) robots. We can control their position with an accuracy of 1 mm,” Zheng Yuanpeng, chief engineer of the telescope’s panel project, told Xinhua News Agency.
FAST’s engineers also had the task of finding a suitable location. As any interference would affect its ability to detect distant radio waves, it needed to be built in a remote area. Luckily, the perfect spot was found in the beautiful mountains of Guizhou Province. “There are three hills about 500 meters away from one another, creating a valley that is perfect to support the telescope," Sun Caihong, chief engineer of FAST’ s construction, told Xinhua.
And although it wasn’t yet fully operated, FAST had already made great discoveries by October 2017. Since 1967, only around 2000 pulsars (脉冲星) have been discovered, yet FAST had detected six more by October 2017. Once FAST is fully up and running, we may finally have the answer to one of the biggest questions in history.
1.What is the purpose of mentioning the question in Paragraph 1?
A.To introduce the new giant telescope.
B.To explain why there is life in universe.
C.To remind readers to think about the life in space.
D.To emphasize the question that should be answered.
2.What can we know from Paragraph 2?
A.The telescope is made up of many panels.
B.The area of FAST is about 800 square kilometers.
C.The engineer can handle FAST’s position accurately.
D.The individual panel helps scientists catch radio signals.
3.Why was FAST built in Guizhou?
A.Because Guizhou is a remote province.
B.Because Guizhou has an ideal valley.
C.Because Guizhou has beautiful mountains.
D.Because Guizhou has the ability to build it.
4.What does the last paragraph mainly talk about?
A.FAST’s timeline. B.FAST’s future.
C.FAST’s operation. D.FAST’s discoveries.
高三英语阅读理解中等难度题查看答案及解析
—The movie starta at 8:30,and we can have a quick bite before wo go
--.See you at 8:10
A. So long B. Sounds great
C. Good luck D. Have a good time
高三英语单项填空简单题查看答案及解析
The stage lights dimmed, and I took a quick look from behind the heavy black curtains into the audience. Blinded by the lights, I quickly______. It seems that a great number of eyes were looking at me. I took a deep ______as the music of my dance began to play. I entered the stage and began my______, the graduation test of the classical Indian dance.
After a decade of learning this art form, I had______been considered ready to take on the most difficult act. The test is the most important event in a dancer's life, as it pays______to all the factors in one's life that______the dance form: one's culture and family.
The performance is undertaken only by the most______and determined students. It is a difficult process that requires much______. For more than six months, I spent two to three hours every day______these dances. Many times, I______myself to my physical and mental breaking point, but still I would not stop. I could not give up. There was always so much more to do and so much more to______.
I______a lot about myself in those tiring hours. I learned that I was far too______to give up, and I was too proud to prove myself______after I had set an unrealistic goal. Even with physical pain and mental______, I forced myself to meet my______. Even when I was at the end of my______, there was always something driving me on, forcing me not to give up.
Fortunately, I made it. What I had done______the success. It was in those hours that I learned what a dancer______is. Those time was evidence that I could______something I set out to do.
1.A.reached out B.set off C.pulled back D.broke away
2.A.sleep B.breath C.thought D.sorrow
3.A.career B.attempt C.response D.performance
4.A.eventually B.easily C.absolutely D.desperately
5.A.debt B.respect C.interest D.visit
6.A.develop B.rescue C.introduce D.promote
7.A.beautiful B.focused C.intelligent D.considerate
8.A.talent B.strength C.comprehension D.commitment
9.A.recording B.discussing C.practicing D.designing
10.A.pushed B.addicted C.treated D.applied
11.A.forget B.design C.learn D.research
12.A.discovered B.abandoned C.controlled D.undertook
13.A.brilliant B.brave C.stubborn D.discouraged
14.A.careless B.nervous C.frightened D.wrong
15.A.function B.stress C.level D.action
16.A.budget B.deadline C.expense D.expectation
17.A.limit B.purpose C.preparation D.destination
18.A.increased B.deserved C.expanded D.exposed
19.A.completely B.chiefly C.originally D.truly
20.A.change B.supply C.accomplish D.explain
高三英语完形填空中等难度题查看答案及解析
The stage lights dimmed, and I took a quick look from behind the heavy black curtains into the audience. Blinded by the lights, I quickly _____. It seems that a great number of eyes were looking at me. I took a deep _____ as the music of my dance began to play. I entered the stage and began my _____, the graduation test of the classical Indian dance.
After a decade of learning this art form, I had _____ been considered ready to take on the most difficult act. The test is the most important event in a dancer’s life as it pays _____ to all the factors in one’s life that _____ the dance form: one’s culture and family.
The performance is undertaken only by the most ______ and determined students. It is a difficult process that requires much ______. For more than six months, I spent two to three hours every day______ these dances. Many times, I ______ myself to my physical and mental breaking point, but still I would not stop. I could not give up. There was always so much more to do and so much more to _____.
I ______ a lot about myself in those tiring hours. I learned that I was far too ______ to give up, and I was too proud to prove myself ______ after I had set an unrealistic goal. Even with physical pain and mental ______, I forced myself to meet my ______. Even when I was at the end of my ______, there was always something driving me on, forcing me not to give up.
Fortunately, I made it. What I had done ______ the success. It was in those hours that I learned what a dancer _____ is. Those time was evidence that I could ______ something I set out to do.
1.A. pulled back B. set off C. reached out D. broke away
2.A. sleep B. thought C. breath D. sorrow
3.A. career B. attempt C. response D. performance
4.A. easily B. eventually C. absolutely D. desperately
5.A. debt B. visit C. interest D. respect
6.A. develop B. rescue C. introduce D. promote
7.A. focused B. beautiful C. intelligent D. considerate
8.A. talent B. strength C. commitment D. comprehension
9.A. recording B. practicing C. discussing D. designing
10.A. applied B. addicted C. treated D. pushed
11.A. forget B. design C. learn D. research
12.A. abandoned B. discovered C. controlled D. undertook
13.A. brilliant B. brave C. stubborn D. discourage
14.A. wrong B. nervous C. frightened D. careless
15.A. function B. action C. level D. stress
16.A. budget B. expectation C. expense D. deadline
17.A. limit B. purpose C. preparation D. destination
18.A. increased B. deserved C. expanded D. exposed
19.A. completely B. chiefly C. truly D. originally
20.A. change B. supply C. explain D. accomplish
高三英语完形填空中等难度题查看答案及解析
The stage lights dimmed, and I took a quick look from behind the heavy black curtains into the audience. Blinded by the lights, I quickly ______. It seems that a great number of eyes were looking at me. I took a deep ______ as the music of my dance began to play. I entered the stage and began my ______, the graduation test of the classical Indian dance.
After a decade of learning this art form, I had ______ been considered ready to take on the most difficult act. The test is the most important event in a dancer’s life as it pays ______ to all the factors in one’s life that ______ the dance form: one’s culture and family.
The performance is undertaken only by the most ______ and determined students. It is a difficult process that requires much ______. For more than six months, I spent two to three hours every day ______ these dances. Many times, I ______ myself to my physical and mental breaking point, but still I would not stop. I could not give up. There was always so much more to do and so much more to ______.
I ______ a lot about myself in those tiring hours. I learned that I was far too ______ to give up, and I was too proud to prove myself ______ after I had set an unrealistic goal. Even with physical pain and mental ______, I forced myself to meet my ______. Even when I was at the end of my ______, there was always something driving me on, forcing me not to give up.
Fortunately, I made it. What I had done ______ the success. It was in those hours that I learned what a dancer ______ is. Those time was evidence that I could ______ something I set out to do.
1.A. reached out B. set off C. pulled back D. broke away
2.A. sleep B. breath C. thought D. sorrow
3.A. career B. attempt C. response D. performance
4.A. eventually B. easily C. absolutely D. desperately
5.A. debt B. respect C. interest D. visit
6.A. develop B. rescue C. introduce D. promote
7.A. beautiful B. focused C. intelligent D. considerate
8.A. talent B. strength C. comprehension D. commitment
9.A. recording B. discussing C. practicing D. designing
10.A. pushed B. addicted C. treated D. applied
11.A. forget B. design C. learn D. research
12.A. discovered B. abandoned C. controlled D. undertook
13.A. brilliant B. brave C. stubborn D. discourage
14.A. careless B. nervous C. frightened D. wrong
15.A. function B. stress C. level D. action
16.A. budget B. deadline C. expense D. expectation
17.A. limit B. purpose C. preparation D. destination
18.A. increased B. deserved C. expanded D. exposed
19.A. completely B. chiefly C. originally D. truly
20.A. change B. supply C. accomplish D. explain
高三英语完形填空中等难度题查看答案及解析