People aren't walking any more—if they can figure out a way to avoid it.
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn't in any hurry, either. I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune(免疫的), for I was born in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day's walk and the ability to cover such a distance in ten hours as a sign of strength and skill. A wellknown British physician, Sir Adolphe Abrhams, pointed out recently that hearts and bodies need proper exercise. A person who avoids exercise is more likely to have illnesses than one who exercises regularly and walking is an ideal form of exercise---the most familiar and natural of all.
It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flowers, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world. He can’t learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don't dare to approach Nature any more. To them the world they were born to enjoy is all threat; to them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind's best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What is the national sickness?
A.Walking too much.
B.Travelling too much.
C.Driving cars too much.
D.Climbing stairs too much.
2.What was life like when the author was young?
A.People usually went around on foot.
B.People often walked 25 miles a day.
C.People used to walk ten hours every day.
D.People considered a tenhour walk as a hardship.
3.What is compared to “a steel river” in Paragraph 6?
A.A queue of cars.
B.A ray of traffic light.
C.A flash of lightning.
D.A stream of people.
4.What is the author's intention of writing this passage?
A.To tell people to reflect more on life.
B.To encourage people to return to walking.
C.To advise people to do outdoor activities.
D.To recommend people to give up driving.
高三英语阅读选择中等难度题
People aren’t walking any more---if they can figure out a way to avoid it..
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn’t in any hurry, either. I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune, for I was bred in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day’s walk and the ability to cover such a distance in ten hours as sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced –and beat—a teenage football player the 168 steps up the Stature of Liberty.
Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrahams, pointed out recently that hearts and bodies need proper exercise. A person who avoids exercise is more likely to have illnesses than one who exercises regularly. And walking is an ideal form of exercise--- the most familiar and natural of all.
It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world. He cannot learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don’t dare to approach Nature any more; to them the world they were born to enjoy is all threat. To them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind’s best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What is the national sickness?
A. Walking too much
B. Traveling too much
C. Driving cars too much
D. Climbing stairs too much.
2.What was life like when the author was young?
A. People usually went around on foot.
B. people often walked 25 miles a day
C. People used to climb the Statue of Liberty.
D. people considered a ten-hour walk as a hardship.
3.The author mentions Henry Thoreau to prove that________.
A. middle-aged people like getting back to nature
B. walking in nature helps enrich one’s mind
C. people need regular exercise to keep fit
D. going on foot prevents heart disease
4.What is compared to “a steel river” in Paragraph 6?
A. A queue of cars B. A ray of traffic light
C. A flash of lightning D. A stream of people
5.What is the author’s intention of writing this passage?
A. To tell people to reflect more on life.
B. To recommend people to give up driving
C. To advise people to do outdoor activities
D. To encourage people to return to walking
高三英语阅读理解中等难度题查看答案及解析
People aren’t walking any more---if they can figure out a way to avoid it.
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn’t in any hurry, either, I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune(免疫的), for I was bred in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day’s walk and the ability to cover such a distance in ten hours as sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced –and beat—a teenage football player the 168 steps up the Stature of Liberty.
Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrhams, pointed out recently that hearts and bodies need proper exercises. A person who avoids exercise is more likely to have illnesses than one who exercises regularly. And walking is an ideal form of exercise--- the most familiar and natural of all.
It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world, He cannot learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don’t dare to approach Nature any more; to them the world they were born to enjoy is all threat. To them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind’s best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What is the national sickness?
A. Walking too much B. Traveling too much
C. Driving cars too much D. Climbing stairs too much.
2.What was life like when the author was young?
A. People usually went around on foot.
B. people often walked 25 miles a day
C. People used to climb the Statue of Liberty.
D. people considered a ten-hour walk as a hardship.
3.The author mentions Henry Thoreau to prove that
A. middle-aged people like getting back to nature
B. walking in nature helps enrich one’s mind
C. people need regular exercise to keep fit
D. going on foot prevents heart disease
4.What is compared to “a steel river” in Paragraph6?
A. A queue of cars B. A ray of traffic light
C. A flash of lightning D. A stream of people
5.What is the author’s intention of writing this passage?
A. To tell people to reflect more on life.
B. To recommend people to give up driving
C. To advise people to do outdoor activities
D. To encourage people to return to walking
高三英语阅读理解中等难度题查看答案及解析
People aren’t walking any more---if they can figure out a way to avoid it.
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn’t in any hurry, either. I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune, for I was bred in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day’s walk and the ability to cover such a distance in ten hours as sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced –and beat—a teenage football player the 168 steps up the Stature of Liberty.
Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrahams, pointed out recently that hearts and bodies need proper exercise. A person who avoids exercise is more likely to have illnesses than one who exercises regularly. And walking is an ideal form of exercise--- the most familiar and natural of all.
It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world. He cannot learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don’t dare to approach nature any more; to them the world they were born to enjoy is all threat. To them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind’s best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What is the national sickness?
A. Walking too much
B. Traveling too much
C. Driving cars too much
D. Climbing stairs too much.
2.What was life like when the author was young?
A. People usually went around on foot.
B. people often walked 25 miles a day.
C. People used to climb the Statue of Liberty.
D. people considered a ten-hour walk as a hardship.
3.The author mentions Henry Thoreau to prove that________.
A. middle-aged people like getting back to nature
B. walking in nature helps enrich one’s mind
C. people need regular exercise to keep fit
D. going on foot prevents heart disease
4.What is compared to “a steel river” in Paragraph 6?
A. A queue of cars B. A ray of traffic light
C. A flash of lightning D. A stream of people
5.What is the author’s intention of writing this passage?
A. To tell people to reflect more on life.
B. To recommend people to give up driving
C. To advise people to do outdoor activities
D. To encourage people to return to walking
高三英语阅读理解中等难度题查看答案及解析
People aren’t walking any more---if they can figure out a way to avoid it.
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn’t in ay hurry, either, I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune(), for I was bred in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day’s walk and the ability to cover such a distance in ten hours as sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced –and beat—a teenage football player the 168 steps up the Stature of Liberty.
Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrhams, pointed out recently that hearts and bodies need proper…… is more likely to have illnesses than one who exercises regularly. And wlaking is an ideal form of exercise--- the most familiar and natural of all.
It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world, He cannot learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don’t dare to approach Nature any more; to them the world they were born to enjoy is all threat. To them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind’s best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What is the national sickness?
A. Walking too much
B. Traveling too much
C. Driving cars too much
D. Climbing stairs too much.
2.What was life like when the author was young?
A. People usually went around on foot.
B. people often walked 25 miles a day
C. People used to climb the Statue of Liberty.
D. people considered a ten-j\hour walk as a hardship.
3.The author mentions Henry Thoreau to prove that
A. middle-aged people like getting back to nature
B. walking in nature helps enrich one’s mind
C. people need regular exercise to keep fit
D. going on foot prevents heart disease
4.What is compared to “a steel river” in Paragraph6?
A. A queue of cars
B. A ray of traffic light
C. A flash of lightning
D. A stream of people
5.What is the author’s intention of writing this passage?
A. To tell people to reflect more non life.
B. To recommend people to give up driving
C. To advise people to do outdoor activities
D. To encourage people to return to walking
高三英语阅读理解中等难度题查看答案及解析
People aren’t walking any more---if they can figure out a way to avoid it．
I felt superior about this matter until the other day I took my car to mail a small parcel．The journey is a matter of 281 steps．But I used the car．And I wasn’t in any hurry, either, I had merely become one more victim of a national sickness: motorosis．
It is an illness to which I had thought myself immune（免疫的）, for I was bred in the tradition of going to places on my own two legs．At that time, we regarded 25 miles as good day’s walk and the ability to cover such a distance in ten hours as sign of strength and skill．It did not occur to us that walking was a hardship．And the effect was lasting．When I was 45 years old I raced –and beat—a teenage football player the 168 steps up the Stature of Liberty．
Such enterprises today are regarded by many middle-aged persons as bad for the heart．But a well-known British physician, Sir Adolphe Abrhams, pointed out recently that hearts and bodies need proper exercises．A person who avoids exercise is more likely to have illnesses than one who exercises regularly．And walking is an ideal form of exercise--- the most familiar and natural of all．
It was Henry Thoreau who showed mankind the richness of going on foot．The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world, He cannot learn in a car．
The car is a convenient means of transport, but we have made it our way of life．Many people don’t dare to approach nature any more; to them the world they were born to enjoy is all threat．To them security is a steel river thundering on a concrete road．And much of their thinking takes place while waiting for the traffic light to turn green．
I say that the green of forests is the mind’s best light．And none but the man on foot can evaluate what is basic and everlasting．
1.What is the national sickness?
A．Walking too much B．Traveling too much
C．Driving cars too much D．Climbing stairs too much．
2.What was life like when the author was young?
A．People usually went around on foot．
B．people often walked 25 miles a day
C．People used to climb the Statue of Liberty．
D．people considered a ten-hour walk as a hardship．
3.The author mentions Henry Thoreau to prove that
A．middle-aged people like getting back to nature
B．walking in nature helps enrich one’s mind
C．people need regular exercise to keep fit
D．going on foot prevents heart disease
4.What is compared to “a steel river” in Paragraph6?
A．A queue of cars B．A ray of traffic light
C．A flash of lightning D．A stream of people
5.What is the author’s intention of writing this passage?
A．To tell people to reflect more on life．
B．To recommend people to give up driving
C．To advise people to do outdoor activities
D．To encourage people to return to walking
高三英语阅读理解中等难度题查看答案及解析
People aren’t walking any more--- if they can figure out a way to avoid it.
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn’t in any hurry, either, I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune, for I was bred in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day’s walk and the ability to cover such a distance in ten hours as a sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced –and beat—a teenage football player the 168 steps up the Stature of Liberty.
Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrhams, pointed out recently that hearts and bodies need proper exercise. A person who avoids exercise is more likely to have illnesses than one who exercises regularly. And walking is an ideal form of exercise--- the most familiar and natural of all. It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world. He cannot learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don’t dare to approach Nature any more; to them the world they were born to enjoy is all threat. To them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind’s best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What was life like when the author was young?
A. people often walked 25 miles a day
B. People usually went around on foot.
C. People used to climb the Statue of Liberty.
D. people considered a ten-hour walk as a hardship.
2.The author mentions Henry Thoreau to prove that ________.
A. middle-aged people like getting back to nature
B. people need regular exercise to keep fit
C. walking in nature helps enrich one’s mind
D. going on foot prevents heart disease
3.What is compared to “a steel river” in Paragraph6?
A. A ray of traffic light B. A queue of cars
C. A flash of lightning D. A stream of people
4.What is the author’s intention of writing this passage?
A. To encourage people to return to walking.
B. To recommend people to give up driving
C. To advise people to do outdoor activities.
D. To tell people to reflect more on life.
高三英语阅读理解中等难度题查看答案及解析
People aren’t walking any more—if they can figure out a way to avoid it.
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn’t in any hurry, either. I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune, for I was born in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day's walk and the ability to cover such a distance in ten hours as sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced ——and beat——a teenage football player the 168 steps up the Stature of Liberty.
Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrahams, pointed out recently that hearts and bodies need proper exercise. A person who avoids exercise is more likely to have illnesses than one who exercises regularly. And walking is an ideal form of exercise—the most familiar and natural of all.
It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world. He cannot learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don’t dare to approach Nature any more; to them the world they were born to enjoy is all threat. To them security is a steel-river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind's best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What is the national sickness?
A．Walking too much.
B．Traveling too much.
C．Driving cars too much.
D．Climbing stairs too much.
2.What was life like when the author was young?
A．People usually went around on foot.
B．People often walked 25 miles a day.
C．People used to climb the Statue of Liberty.
D．People considered a ten-hour walk as a hardship.
3.The author mentions Henry Thoreau to prove that ________.
A．middle-aged people like getting back to nature
B．walking in nature helps enrich one’s mind
C．people need regular exercise to keep fit
D．going on foot prevents heart disease
4.What is compared to “a steel river” in Paragraph 6?
A．A queue of cars.
B．A ray of traffic light.
C．A flash of lightning.
D．A stream of people.
高三英语阅读理解中等难度题查看答案及解析
People aren’t walking any more—if they can figure out a way to avoid it.
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn’t in a hurry, either, I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune(免疫的), for I was bred in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day’s walk and the ability to cover such a distance in ten hours as sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced— and beat—a teenage football player the 168 steps up the Stature of Liberty.
Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrhams, pointed out recently that hearts and bodies need proper…… is more likely to have illnesses than one who exercises regularly. And walking is an ideal form of exercise — the most familiar and natural of all.
It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world, He cannot learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don’t dare to approach Nature any more; to them the world they were born to enjoy is all threat. To them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind’s best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What is the national sickness?
A. Walking too much.
B. Traveling too much.
C. Driving cars too much.
D. Climbing stairs too much.
2.What was life like when the author was young?
A. People usually went around on foot.
B. people often walked 25 miles a day
C. People used to climb the Statue of Liberty.
D. people considered a ten-hour walk as a hardship.
3.The author mentions Henry Thoreau to prove that ________.
A. middle-aged people like getting back to nature
B. walking in nature helps enrich one’s mind
C. people need regular exercise to keep fit
D. going on foot prevents heart disease
4.What is compared to “a steel river” in Paragraph 6?
A. A queue of cars.
B. A ray of traffic light.
C. A flash of lightning.
D. A stream of people.
5.What is the author’s intention of writing this passage?
A. To tell people to reflect more on life.
B. To recommend people to give up driving.
C. To advise people to do outdoor activities.
D. To encourage people to return to walking.
高三英语阅读理解中等难度题查看答案及解析
B
People aren’t walking any more--- if they can figure out a way to avoid it.
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn’t in any hurry, either, I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune(免疫的), for I was bred in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day’s walk and the ability to cover such a distance in ten hours as a sign of strength and skill. It did not occur to us that walking was a hardship. And the effect was lasting. When I was 45 years old I raced –and beat—a teenage football player the 168 steps up the Stature of Liberty.
Such enterprises today are regarded by many middle-aged persons as bad for the heart. But a well-known British physician, Sir Adolphe Abrhams, pointed out recently that hearts and bodies need proper exercise. A person who avoids exercise is more likely to have illnesses than one who exercises regularly. And walking is an ideal form of exercise--- the most familiar and natural of all.
It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flower, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world. He cannot learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don’t dare to approach Nature any more; to them the world they were born to enjoy is all threat. To them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind’s best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What was life like when the author was young?
A. People usually went around on foot.
B. people often walked 25 miles a day
C. People used to climb the Statue of Liberty.
D. people considered a ten-hour walk as a hardship.
2.The author mentions Henry Thoreau to prove that
A. middle-aged people like getting back to nature
B. walking in nature helps enrich one’s mind
C. people need regular exercise to keep fit
D. going on foot prevents heart disease
3.What is compared to “a steel river” in Paragraph6?
A. A queue of cars
B. A ray of traffic light
C. A flash of lightning
D. A stream of people
4.What is the author’s intention of writing this passage?
A. To tell people to reflect more on life.
B. To recommend people to give up driving
C. To advise people to do outdoor activities
D. To encourage people to return to walking
高三英语阅读理解中等难度题查看答案及解析
People aren't walking any more—if they can figure out a way to avoid it.
I felt superior about this matter until the other day I took my car to mail a small parcel. The journey is a matter of 281 steps. But I used the car. And I wasn't in any hurry, either. I had merely become one more victim of a national sickness: motorosis.
It is an illness to which I had thought myself immune(免疫的), for I was born in the tradition of going to places on my own two legs. At that time, we regarded 25 miles as good day's walk and the ability to cover such a distance in ten hours as a sign of strength and skill. A wellknown British physician, Sir Adolphe Abrhams, pointed out recently that hearts and bodies need proper exercise. A person who avoids exercise is more likely to have illnesses than one who exercises regularly and walking is an ideal form of exercise---the most familiar and natural of all.
It was Henry Thoreau who showed mankind the richness of going on foot. The man walking can learn the trees, flowers, insects, birds and animals, the significance of seasons, the very feel of himself as a living creature in a living world. He can’t learn in a car.
The car is a convenient means of transport, but we have made it our way of life. Many people don't dare to approach Nature any more. To them the world they were born to enjoy is all threat; to them security is a steel river thundering on a concrete road. And much of their thinking takes place while waiting for the traffic light to turn green.
I say that the green of forests is the mind's best light. And none but the man on foot can evaluate what is basic and everlasting.
1.What is the national sickness?
A.Walking too much.
B.Travelling too much.
C.Driving cars too much.
D.Climbing stairs too much.
2.What was life like when the author was young?
A.People usually went around on foot.
B.People often walked 25 miles a day.
C.People used to walk ten hours every day.
D.People considered a tenhour walk as a hardship.
3.What is compared to “a steel river” in Paragraph 6?
A.A queue of cars.
B.A ray of traffic light.
C.A flash of lightning.
D.A stream of people.
4.What is the author's intention of writing this passage?
A.To tell people to reflect more on life.
B.To encourage people to return to walking.
C.To advise people to do outdoor activities.
D.To recommend people to give up driving.
高三英语阅读选择中等难度题查看答案及解析