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[主观题]

One of these pioneer ecologists was Frederick Clements, who studied ecology extensively th

roughout the Midwest and other areas in North America. He held that within any given region of climate, ecological communities tended to slowly converge toward a single endpoint, which he called the "climatic climax." This "climax" community was, in Clementss mind, the most well-balanced, integrated grouping of species that could occur within that particular region. Clements even thought that the process of ecological succession—the replacement of some species by others over time—was somewhat akin to the development of an organism, from embryo to adult. Clements thought that succession represented discrete stages in the development of the community(rather like infancy, childhood, and adolescence), terminating in the climatic "adult" stage, when the community became self-reproducing and succession ceased. Clementss view of the ecological community reflected the notion of a precise balance of nature.

In paragraph 5, why does the author mention green ash trees and plains cottonwood trees？

A．To support the current view about how ecological communities develop

B．To provide an example of species that prefer to live on floodplains

C．To provide evidence that supports the theory of Clements

D．To show where one ecological community stops and the other begins

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发布时间：2019-08-03

更多“One of these pioneer ecologists was Frederick Clements, who studied ecology extensively th”相关的问题

第1题

I, ______ , do not believe that the era of the pioneer is at an end; I only believe that t

he area for pioneering has changed.

A．for one's part

B．for one's good

C．for one

D．for oneself

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第2题

I, ______, do not believe that the era of the pioneer is at an end; I only believe that th

e area for pioneering has changed.

A．for one's part

B．for one's good

C．for one

D．for oneself

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第3题

One of the most striking things about Americans is that they seem of expecting everyone to

like them【C1】______. they go. Americans aren't of course the only people in the world who take【C2】______that their cultural standards are generally admired — monoculturalism is typical【C3】______every society in the world. But it isn't【C4】______that Americans seem to expect — they seem to expect【C5】______This phenomenon, which the rest of the world finds both amusing and【C6】______, may be at least partly【C7】______to the American definition of friendliness. To Americans, friendliness means【C8】______informal and cheerful and open to other people, even before you know them【C9】______to be sure you like them. And it's important to note that【C10】______real friendship may certainly arise【C11】______acting friendly in this way, Americans don't mistake acting friendly【C12】______being friends. This can, of course, cause【C13】______when Americans meet people from more reserved cultures. But if you consider【C14】______American history, it's easier to see where this pattern of behavior. comes from. In the pioneer days, if you acted too reserved and formal, no one【C15】______any reason to help you if you got into trouble(【C16】______there was plenty of in the pioneer days). Having a wide circle of friendly acquaintances was a key【C17】______survival, so "friendliness" became a【C18】______pattern of behavior. that every generation of Americans is trained to【C19】______in a high degree. They're so good at being friendly — and it works at home — so Americans'【C20】______is that it will work everywhere.

【C1】

A．wherever

B．anywhere

C．where

D．whenever

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第4题

One of the most striking things about Americans is that they seem to expect everyone to li

ke them【C1】______they go. Americans aren't of course the only people in the world who take【C2】______that their cultural standards are generally admired--monoculturalism is typical【C3】______every society in the world. But it isn't【C4】______that Americans seem to expect- they seem to expect【C5】______. This phenomenon, which the rest of the world finds both amusing and【C6】______, may be at least partly【C7】______to the American definition of friendliness. To Americans, friendliness means【C8】______informal and cheerful and open to other people, even before you know them【C9】______to be sure you like them. And it's important to note that【C10】______real friendship may certainly arise【C11】______acting friendly in this way, Americans don't mistake acting friendly【C12】______being friends. This can, of course, cause【C13】______when Americans meet people from more reserved cultures. But if you consider【C14】______American history, it's easier to see where this pattern of behavior. comes from. In the pioneer days, if you acted too reserved and formal, no one【C15】______any reason to help you if you got into trouble(【C16】______there was plenty of in the pioneer days). Having a wide circle of friendly acquaintances was a key【C17】______survival, so "friendliness" became a【C18】______pattern of behavior. that every generation of Americans is trained to【C19】______in a high degree. They're so good at being friendly and it works at home--so Americans'【C20】______is that it will work everywhere.

【C1】

A．wherever

B．anywhere

C．where

D．whenever

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第5题

听力原文： After retiring from 30 years of teaching, Ethbell Pepper could easily have decid

ed to sit back and relax and enjoy a peaceful retirement. But that kind of life is not for Ethbell Pepper. "I just want to do something different. If you are going to participate in life, do it. Don't just sit down and look out of the window." She says. At 68, she decided to become one of the pioneer participation in a program in the University of California. The program offers campus housing and classes to people over sixty. She enrolled in a class called Human Relationships and Diverse Society. "I have taught my minority students in my English and drama classes in high school for 20 years. But in this course, I found out a lot about other cultures I didn't know then. One of the most important lessons that I'm learning is to perceive, not to judge." Older adults can add to the educational resources at the university by bringing with them a lot of valuable experience. Their presence on campus helps break some long believes of aging. Young students may have fears of growing older. But that kind of fear can be reduced as they see that older people can be active, healthy, and continue to contribute to society. The younger students can begin to see aging as a natural part of living.

What did Ethbell do when she was 68？

A．She sat back and relaxed.

B．She decided to retire.

C．She entered university.

D．She worked out a new English program.

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第6题

听力原文： After retiring from 30 years of teaching, I could easily have decided to sit bac

k and relax and enjoy a peaceful retirement. But that kind of life is not for me. I just wanted to do something different. If you are going to participate in life, do it. Don't just sit down and look out of the window. At 68, I decided to become one of the pioneer participants in a program at the University of California. The program offers campus housing and classes to people over sixty. I enrolled in a class called Human Relationships and Diverse Society. I taught my minority students in my English and drama classes in high school for 20 years. But in this course, I found out a lot about other cultures I didn't know then. One of the most important lessons that I'm learning is to perceive (感知,理解), not to judge. Older adults can add to the educational resources of the university by bringing with them a lot of valuable experience. Their presence on campus helps break some long held beliefs about aging. Young students may have fears of growing older. But that kind of fear can be reduced as they see that older people can be active, healthy, and continue to contribute to society. The younger students can begin to see aging as a natural part of living.

What did the speaker do when she was 68？

A．She sat back and relaxed.

B．She decided to retire.

C．She entered university.

D．She worked out a new English program.

点击查看答案

第7题

听力原文：After retiring from 30 years of teaching, Ethbell Pepper could easily have decide

听力原文： After retiring from 30 years of teaching, Ethbell Pepper could easily have decided to sit back and relax and enjoy a peaceful retirement. But that kind life is not for Ethbell Pepper. “I just wanted to do something different. If you are going to participate in life, do it. Don’t just sit down and look out the window.” She says. At 68, she decided to become one of the pioneer participants in a program at the University of California. The program offers campus housing and classes to people over sixty. She enrolled in a class called Human Relationships in a Diverse Society. “I taught minority students in my English and Drama classes in high school for 20 years. But in this course, I found out a lot about other cultures that I didn’t know then. One of the most important lessons that I’m learning is to perceive, not to judge.” Older adults can add to the educational resources of the university by bringing with them a lot of valuable experience. Their presence on campus helps break some working believes about aging. Young students may have fears of growing older. But that kind of fear can be reduced as they see that older people can be active, healthy, and continue to contribute to society. The younger students can begin to see aging as a natural part of living.

(33)

A．She sat back and relaxed.

B．She decided to retire.

C．She entered university.

D．She worked out a new English program.

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第8题

听力原文：After retiring from 30 years of teaching, Suzanne could easily have decided to si

听力原文： After retiring from 30 years of teaching, Suzanne could easily have decided to sit back and relax and enjoy a peaceful retirement. But that kind of life is not for Suzanne. "I just wanted to do something different. If you are going to participate in life, do it. Don't just sit down and look out of the window," she says. At 68, she decided to become one of the pioneer participants in a program at the University of California. The program offers campus housing and classes to people over sixty. She enrolled in a class called Human Relationships in a Diverse Society. "I taught minority students in my English and drama classes in high school for g0 years. But in this course, I found out a lot about other cultures and I didn't know then. One of the most important lessons that I'm learning is to perceive, not to judge." Older adults can add to the educational resources of the university by bringing with them a lot of valuable experience. Their presence on campus helps break some wrong beliefs about aging. Young students may have fears of growing older but that kind of fear can be reduced as they see that older people can be active, healthy, and continue to contribute to society. The younger students can begin to see aging as a natural part of living.

(23)

A．She sat back and relaxed.

B．She decided to retire.

C．She entered university.

D．She worked out a new English program.

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第9题

听力原文： We do not know when man first begin to use salt, but we do know that it has been

used in many different ways throughout history. Historical evidence shows that people who lived over 3 000 years ago ate salted fish. Thousands of years ago in Egypt, salt was used to embalm the dead.

Stealing salt was considered a major crime during some eras of history. In the 18th century, if a person were caught stealing salt, he could be put in jail. History records that about ten thousand people were put in jail during that century for stealing salt!

Salt was an important item on the table of royalty. It was traditionally placed in front of the king when he sat down to eat. Important guests at the king's table were seated near the salt. Less important guests were given seats farther away from it.

In the Roman Empire, one of the most important roads was the one that carried salt mines to Rome. Guards were stationed along the route to protect against salt thieves.The guards received their pay in salt, hence the English word, salary.

In the early days of the United States, salt was very scarce. So, the storekeeper of pioneer days was very careful with his salt. In the modern world salt has many uses beyond the dining table. For example, it is used in the making of glass, in the growing of crops, and so on. Salt even helps to relieve itching when it is rubbed on mosquito or other insect bites.

(33)

A．He could be fired.

B．He could be put to death.

C．He could be put in jail.

D．He could be driven out of his village.

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第10题

The Origin of the Air Mail At Blackpool Holt Thomas and Graham-White agreed to make a prac

The Origin of the Air Mail

At Blackpool Holt Thomas and Graham-White agreed to make a practical experiment in carrying mails by aeroplane. The idea, as it was first worked out, was for the aeroplane to fly from Blackpool airport across to Southport airport, and for the mails to be taken over by the Post Office there. But the programme had to be changed owing to a series of high winds. What happened in the end was that Graham-White took a mail-bag in his plane, and made a flight with it across country for a distance of about seven miles, returning to the airport. This experiment gave Graham-White the honour of being the first airman in England to carry a bag of mail across country in an aeroplane. Letters and postcards which were carried in this test, and which had a special stamp recording the fact, soon became much sought after by collectors.

The second and more important experiment in British air mail transport took place in September 1911, and was the first of its kind in this country to obtain the official permission of the Postmaster-general. It was indeed one of the historical events in our airmail development. In this case as many as 130,000 letter and postcards were carried by aeroplane between London and Windsor. One of the airmen engaged in this pioneer service was the famous Gustav Hamel, flying a monoplane. I remember going out one afternoon to see him start off with one of the bags of mail. It was an extremely bad day for flying, and just before the time due for the start, the wind was blowing at nearly 50 miles an hour. None of the other pilots would have thought of going up, but Hamel—one of the finest of all pilots of the British monoplane—was not to be stopped. He jumped into his machine and fairly shot off the ground. The monoplane, so long as it was near the earth, was thrown about like a small boat on an angry sea. But Hamel gave a splendid exhibition of airmanship; as soon as he reached a great height, conditions became much steadier ,and he finished his journey without accident.

This was an early demonstration that an airplane was more than a fine weather machine, and that it could fight its way successfully through violent winds. This fact impressed the postal authorities a good deal, and helped those who believed that the airplane had a great commercial future.

Holt Thomas and Graham-White were the first airmen to carry the airmail in England.

A．True

B．False

C．Not mentioned

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