When nature is left alone, a balance is reached among the animals and plants living in one area. But when man starts his work in nature, the balance is likely to be destroyed. He grows a crop and takes it away to eat ;then there are no dead leaves to fall on the ground, holding water while it sinks into the surface, or decaying (腐烂) and adding humus (腐殖质) to the soil. Unless a farmer acts with knowledge and skill, he is therefore most likely to make the land poorer. To take the place of the useful matter in the crops that he removes, he uses some kind of fertilizer (肥料). Chemical fertilizers are of great help, but the waste products of animals and decaying remains of plants should also be put on the land. In some places, it is a habit to burn waste material lying about, but such burning destroys the useful matter in the dead plants. Although the ashes that are left are valuable when put on the land, a better practice is to bury the waste so that it decays and increases the humus in the soil.
In the past, when the world population was much lower than it is now, a man had little difficulty in ordinary times in growing the food that was needed. When a field had been used some years and had become tired, the farmer could move to another place. The tired land then slowly recovered. By and by grasses and other plants would appear on it and its productive power would slowly return to normal through their decay. But nature, left alone, would take a long time to bring back the land to its former state; the length of time required would depend on local conditions, but it might well be ten years.
It is a bad practice to grow the same crop in a field year after year. If the crop is changed, the land will suffer less because it is treated and used in a different way. Different plants have different effects on the soil. Therefore, a change of crop will do less harm than the growing of the same crop year after year and a regular change to grass will do good to the soil. Much will therefore be gained if different crops are grown one after another, a method known as the rotation (轮作) of crops.
1.According to the passage, the land will become poorer ( )
A. if all the dead leaves are cleared away B. if the humus is increased after the harvest
C. if dead leaves decay in the soil by themselves D. if waste plant material lying about is buried
2.We can learn from the passage that the tired land has slowly recovered ( )
A. when grasses and other plants appear again
B. when the treatment is given by nature alone
C. after new grasses and other plants have decayed again
D. after nature has been left alone for several months
3.A modern farmer can hardly move to another place as he did before because ( )
A. the productive power of a new field isn't higher than that of an old one
B. there are few free fields left for him to do farming
C. it takes a farmer more than ten years to start farming in a new field
D. there will be too many grasses in a new field to grow crops
4.It is most likely that the author will go on to ( ) in the paragraph following the passage above.
A. introduce other methods of planting crops B. deal with how to prevent land getting tired
C. start another topic of how to make use of land D. further explain what the rotation of crops is
高一英语阅读理解简单题
When nature is left alone, a balance is reached among the animals and plants living in one area. But when man starts his work in nature, the balance is likely to be destroyed. He grows a crop and takes it away to eat ;then there are no dead leaves to fall on the ground, holding water while it sinks into the surface, or decaying (腐烂) and adding humus (腐殖质) to the soil. Unless a farmer acts with knowledge and skill, he is therefore most likely to make the land poorer. To take the place of the useful matter in the crops that he removes, he uses some kind of fertilizer (肥料). Chemical fertilizers are of great help, but the waste products of animals and decaying remains of plants should also be put on the land. In some places, it is a habit to burn waste material lying about, but such burning destroys the useful matter in the dead plants. Although the ashes that are left are valuable when put on the land, a better practice is to bury the waste so that it decays and increases the humus in the soil.
In the past, when the world population was much lower than it is now, a man had little difficulty in ordinary times in growing the food that was needed. When a field had been used some years and had become tired, the farmer could move to another place. The tired land then slowly recovered. By and by grasses and other plants would appear on it and its productive power would slowly return to normal through their decay. But nature, left alone, would take a long time to bring back the land to its former state; the length of time required would depend on local conditions, but it might well be ten years.
It is a bad practice to grow the same crop in a field year after year. If the crop is changed, the land will suffer less because it is treated and used in a different way. Different plants have different effects on the soil. Therefore, a change of crop will do less harm than the growing of the same crop year after year and a regular change to grass will do good to the soil. Much will therefore be gained if different crops are grown one after another, a method known as the rotation (轮作) of crops.
1.According to the passage, the land will become poorer ( )
A. if all the dead leaves are cleared away B. if the humus is increased after the harvest
C. if dead leaves decay in the soil by themselves D. if waste plant material lying about is buried
2.We can learn from the passage that the tired land has slowly recovered ( )
A. when grasses and other plants appear again
B. when the treatment is given by nature alone
C. after new grasses and other plants have decayed again
D. after nature has been left alone for several months
3.A modern farmer can hardly move to another place as he did before because ( )
A. the productive power of a new field isn't higher than that of an old one
B. there are few free fields left for him to do farming
C. it takes a farmer more than ten years to start farming in a new field
D. there will be too many grasses in a new field to grow crops
4.It is most likely that the author will go on to ( ) in the paragraph following the passage above.
A. introduce other methods of planting crops B. deal with how to prevent land getting tired
C. start another topic of how to make use of land D. further explain what the rotation of crops is
高一英语阅读理解简单题查看答案及解析
At times the balance in nature is____, resulting in a number of possibly unforeseen effects.
A.confused | B.puzzled | C.disturbed | D.troubled |
高一英语单项填空中等难度题查看答案及解析
At times the balance in nature is ______,resulting in a number of possibly unforeseen effects.
A.troubled B.confused C.disturbed D.puzzled
高一英语单项填空中等难度题查看答案及解析
When I was 14, I left school. I was on the way to California to follow my dream.
When I reached downtown El Paso, I met a bum on the street corner. He stopped me and asked me if I was running away from home. I told him, “Not exactly, sir,” because my father had given me a ride to the train station and said, “It is important to follow your dream, son.”
After talking for a few minutes, the friendly bum told me to follow him. He took me to a public library.
The bum first took me to a table and asked me to sit down and wait for a moment. A few moments later, he returned with some old books and sat beside me. Then he said, “There are two things that I want to teach you, young man, and they are these: Number one is to never judge a book by its cover, for a cover can fool you.” He continued, “You think I’m a bum, don’t you, young man?” I said, “Well, uh, yes, sir.” “Well, young man, I’ve got a little surprise for you. I am one of the richest men in the world. But I realized there were certain things I had not yet experienced in life. So for the past year, I have been going from city to city living as a bum. So, you see, don’t ever judge a book by its cover.”
“Number two is to learn how to read, my boy. There is only one thing that people can't take away from you, and that is your wisdom.” At that moment, he showed me the old books.
The bum then took me back to the street where we first met. He asked me never to forget what he taught me when we left each other.
1.The word bum in the second paragraph means a person who is_____
A. homeless and poor B. polite and friendly
C. rich and generous D. old and knowledgeable
2.How did the writer arrive at the train station?
A. He rode to the station himself. B. His father gave him a ride to the station.
C. A bum took him to the station. D. He followed his dream to the station.
3.Which of the following statements is NOT TRUE according to the passage?
A. Wisdom is one thing that people can’t take away from you.
B. The bum asked the writer to read some old books in the library.
C. The bum’s hope was to have different kinds of experiences in life.
D. The writer’s father supported his choice of following his dream.
4.The best title of this passage probably is_______ .
A. Follow your Dream B. Never Judge a Book by Its Cover
C. An important Lesson D. Wisdom is Important
高一英语阅读理解中等难度题查看答案及解析
Among the crises that face humans ________ the lack of natural resources.
A.is B.are C.is there D.are there
高一英语单项填空中等难度题查看答案及解析
The study of natural history is not something to be left to biologists. In fact, their capacity _____ the time they can spend away from their offices is very limited.
A.in search of B.in face of C.in favour of D.in terms of
高一英语单项填空简单题查看答案及解析
_________they grow they make sure that what is left in the ground after harvesting_________a natural fertilizer for the next year’s crop.
A. Whatever; become B. Whichever; become
C. Whatever; becomes D. Whichever; becomes
高一英语单项填空中等难度题查看答案及解析
However, at times this balance in nature is ______, resulting in a number of unforeseen effects.
A. troubled B. disturbed C. confused D. Puzzled
高一英语单项填空中等难度题查看答案及解析
Unluckily, not everyone has realized the important role the balance of nature _______ in their daily life.
A.makes B.plays C.acts D.does
高一英语单项填空中等难度题查看答案及解析
To us it seems so natural to put up an umbrella to keep the water off when it rains, But actually the umbrella was not invented as protection against the rain, Its first use was as a shade against the sun! Nobody knows who first invented it, but the umbrella was used in very ancient times. Probably the first to use it were the Chinese in the eleventh century BC.
We know that the umbrella was used in ancient Egypt and Babylon as a sunshade. And there was a strange thing connected with its use: it became a symbol of honor. In the Far East in ancient times, the umbrella was allowed to be used only by those in high office.
In Europe, the Greeks were the first to use the umbrella as a sunshade. And the umbrella was in commonly used in ancient Greece. But it is believed that the first persons in Europe to use the umbrella as protection against the rain were the ancient Romans.
During the Middle Ages, the use of the umbrella practically disappeared. Then it appeared again in Italy in the late sixteenth century. And again it was considered as a symbol of power. By 1680, the umbrella appeared in France and later in England.
By the eighteenth century, the umbrella was used against rain throughout most of Europe. Umbrellas have not changed much in style during all this time, though they have become much lighter in weight. It wasn’t until the twentieth century that women’s umbrellas began to be made, in a whole variety of colors.
1.Which of the following statements is not true about the umbrella?
A. No one exactly knows who the inventor of the umbrella was
B. The umbrella was first invented to be used as protection against the sun.
C. The umbrella changed much in style in the eighteenth century
D. In Europe, the Greeks were the first to use the umbrella as a sunshade.
2.A strange feature of the umbrella’s use is that it was used as__________.
A. protection against rain
B. a shade against the sun
C. a symbol of honor and power
D. women’s decoration (装饰)
3.In Europe, the umbrella was first used against the rain_____________.
A. during the Middle Ages
B. by the eighteenth
C. in Rome
D. in Greece
4.This passage talks mainly about_______________.
A. when and how the umbrella was invented
B. why the umbrella was so popular in Europe
C. the development of the umbrella
D. The history and use of the umbrella
高一英语阅读理解中等难度题查看答案及解析