题目内容

Land animals are believed to have ________ sea animals.

[　　]

A．been developed from
B．been developed
C．developed from
D．developed into
答案：C
练习册系列答案
相关题目

Could a grizzly bear move to your neighborhood? If you live in the U.S. West, the answer may be yes. People and grizzly bears are living closer together now.

The grizzly bear is one of the largest meat-eating land animals in North America. In the early 1800s, about 50,000 grizzly bears lived there. Today there’re far fewer bears. Settlers built cities and roads where bears lived. Many bears were hunted and killed. Now only 1,200 to 1,400 grizzly bears have remained.

In and around Yellowstone National Park, grizzly bears have been making a comeback because of people’s efforts to protect them. Some bears are moving to areas where people live. People are also moving into grizzly countries.

People there have to learn how to live with their new, furry (毛皮的) neighbors peacefully. If someone leaves their barbecue grill（烤肉架）out overnight, or leaves their pet food or rubbish where a bear can get it, the bear will learn to come to their house for food. Grizzly bears that learn to eat people’s food can become dangerous, and they often have to be killed or moved. Also, it’s important not to surprise a grizzly. Besides, if you are hiking in a grizzly country, you should go with others and make a noise to make bears hear your coming and get out of the way. You may not want to invite grizzly bears to your next neighborhood party, but with a little effort, grizzly bears and people can live together peacefully.

Why does the number of grizzly bears get smaller, according to the text?

A. Settlers’ buildings break the balance of their living environment.  

B. Land for them to live on is limited and they are hunted in large numbers.

C. Yellowstone National Park wants to control the number of them.

D. Living closer to humans makes them die from serious diseases.

How many suggestions are made for people to live with bears peacefully？

A. One.          B. Two.       C. Three.          D. Four.

Compared with the early 1800s, the number of grizzly bears has got smaller by ______.

A. exactly 26﹪          B. over 36﹪   C. nearly 64﹪   D. about 96﹪

Which of the following statements is TRUE according to the passage?

A. Grizzly bears are always friendly to the people living in grizzly countries.

B. It is certain that grizzly bears and people can live together peacefully.

C. Grizzly bears are protected only in and around Yellowstone National Park.

D. The grizzly bear is one of the largest meat-eating animals in North America.

What does the last paragraph mainly tell us?

A. How to protect yourself from grizzly bears.

B. How to get grizzly bears out of your way.

C. How to invite grizzly bears to your party.

D. How to live with grizzly bears peacefully.

Weather changes when the temperature and the amount of water in the atmosphere change. We can see and feel water coming from the atmosphere when we have rain. But the water must somehow get back to the atmosphere. Meteorologists call this the water cycle.

   There are many stages in the water cycle. Rain falls when water vapour in clouds condenses(凝结). Drops of water form and fall to the ground. The water soaks into the ground and feeds streams and rivers. A lot of rain falls into the sea. The heat of the sun evaporates some of the water in the ground and in the rivers, lakes, and the sea. It changes the liquid water into water vapour. The vapour rises onto the air. Water vapour is normally invisible. On a very damp or humid day, however, you can sometimes see water vapour rising from a puddle(水坑) or pond in a mist(薄雾) above the water. Water vapour also gets into the air from living things. Trees and other plants take in water through their roots and give off water vapour from their leaves. People and land animals drink water and breathe out water vapour. In all these ways the water returns to the air. There it gathers to form clouds and condenses to form rain. The rain falls to earth, and the cycle starts again. It continues even if snow or hail(冰雹) fall instead because both eventually melt to form water. The amount of water vapour in the air depends on the temperature. The air is more moist(潮湿) in the tropics(热带) than in the cold polar regions.

1. What is the main idea of the passage?

A. Water cycle.                                 B. Water vapour.

C. How rain forms.                      D. Water, vapour, rain.

2. How many ways of the water returning to the air are discussed in the text?

A. Two.                  B. Three.        C. Four.        D. Five.

3. Whether water vapour can be seen or not depends on _______.

A. how much water is evaporated         B. how good your eyes are

C. in which way water is evaporated           D. climate or weather

4. From the passage we get to know _______.

A. there is more water vapour in the air in the tropics than in cold polar regions

B. there is more water vapour in the air in cold polar region than in the tropics

C. it gets more rain in the tropics than in cold polar regions because there is less vapour

D. the amount of water vapour in the air depends on how often it rains

Most people regard zoos as safe places for animals, where struggles such as difficulty finding food and avoiding predators（捕食性动物） don't exist. Without such problems, animals in zoos should live to a ripe old age. But that may not be true for the largest land animals on Earth. Scientists have known that elephants in zoos often develop diseases, joint problems and behavior changes. Sometimes, they even become unable to have babies.
To learn more about how captivity(监禁) affects elephants, a team of international scientists led by Mason, a biologist, compared the life spans of female elephants born in zoos with female elephants living outdoors in the wild. Zoos keep detailed records of all the animals in their care, documenting factors such as birth dates, illnesses, weight and death. These records made it possible for the researchers to analyze 40 years of data on 800 elephants in zoos.
The team found that female elephants born in zoos lived an average of 16.9 years. Their wild counterparts（同类事物） who died of natural causes lived an average of 56 years——more than three times as long.
Scientists don't yet know for sure why wild elephants seem to live so much better than their zoo-raised counterparts. Mason thinks stress and obesity(肥胖) may be to blame. Zoo elephants don't get the same kind of exercise as they do in the wild, and most are very fat. Elephant social lives are also much different in zoos than in the wild, where they live in large groups.
Another finding from the study showed that elephants born in zoos were more likely to die earlier than elephants captured in the wild and brought to zoos. Mason suggests stress in the mothers in zoos might cause them to have babies that are less likely to survive.
The study raises some questions about acquiring more elephants to keep in zoos. While some threatened and endangered species living in zoos reproduce successfully and keep healthy populations, that doesn't appear to be the case with elephants.
【小题1】The text tells us that zoo elephants are different from other zoo animals because they________

A．develop health problems.
B．1ive to a ripe old age.
C．are not afraid of predators.
D．have difficulty eating food.
【小题2】What do the scientists find in their research?
A．Female elephants live longer than male elephants.
B．Female zoo elephants die earlier than their wild counterparts.
C．Female zoo elephants live longer than their wild counterparts.
D．Both elephants in zoos and those in the wild live in large herds.
【小题3】Which of the following does the author suggest in the last paragraph?
A．Zoo-born elephants should be attended more carefully
B．Elephants are no longer an endangered species.
C．It may not be a wise policy to keep elephants in the zoo.
D．Zoos should keep more animals except elephants.
【小题4】Which of the following can be the best title?
A．Comparison between two species of elephants
B．Longer lives for wild elephants
C．Female elephants suffer from poor health.
D．Longer lives for zoo animals.

Could a grizzly bear move to your neighborhood? If you live in the U.S. West, the answer may be yes. People and grizzly bears are living closer together now.
The grizzly bear is one of the largest meat-eating land animals in North America. In the early 1800s, about 50,000 grizzly bears lived there. Today there’re far fewer bears. Settlers built cities and roads where bears lived. Many bears were hunted and killed. Now only 1,200 to 1,400 grizzly bears have remained.
In and around Yellowstone National Park, grizzly bears have been making a comeback because of people’s efforts to protect them. Some bears are moving to areas where people live. People are also moving into grizzly countries.
People there have to learn how to live with their new, furry (毛皮的) neighbors peacefully. If someone leaves their barbecue grill（烤肉架）out overnight, or leaves their pet food or rubbish where a bear can get it, the bear will learn to come to their house for food. Grizzly bears that learn to eat people’s food can become dangerous, and they often have to be killed or moved. Also, it’s important not to surprise a grizzly. Besides, if you are hiking in a grizzly country, you should go with others and make a noise to make bears hear your coming and get out of the way. You may not want to invite grizzly bears to your next neighborhood party, but with a little effort, grizzly bears and people can live together peacefully.
【小题1】Why does the number of grizzly bears get smaller, according to the text?

A．Settlers’ buildings break the balance of their living environment.
B．Land for them to live on is limited and they are hunted in large numbers.
C．Yellowstone National Park wants to control the number of them.
D．Living closer to humans makes them die from serious diseases.
【小题2】 How many suggestions are made for people to live with bears peacefully？
A．One. B．Two. C．Three.D．Four.
【小题3】 Compared with the early 1800s, the number of grizzly bears has got smaller by ______.
A．exactly 26﹪B．over 36﹪C．nearly 64﹪D．about 96﹪
【小题4】 Which of the following statements is TRUE according to the passage?
A．Grizzly bears are always friendly to the people living in grizzly countries.
B．It is certain that grizzly bears and people can live together peacefully.
C．Grizzly bears are protected only in and around Yellowstone National Park.
D．The grizzly bear is one of the largest meat-eating animals in North America.
【小题5】 What does the last paragraph mainly tell us?
A．How to protect yourself from grizzly bears.
B．How to get grizzly bears out of your way.
C．How to invite grizzly bears to your party.
D．How to live with grizzly bears peacefully.

Elephants have four distinct personalities that help their herd survive in the African bush, scientists have found. 

With their grey skin, mournful eyes and slow heavy pace, you could be forgiven for thinking elephants are uniformly melancholy(忧郁的) creatures. But scientists have now discovered the largest living land animals have personalities to match their size.

In a new study of African elephants, researchers have identified four distinct characters that are common in a herd – the leaders, the gentle giants, the playful rogues(小淘气) and the reliable plodders (辛勤工作的人).

Each of the types has developed to help the giant mammals survive in their harsh environment and is almost unique in the animal kingdom, according to the scientists.

Professor Phyllis Lee and her colleague Cynthia Moss studied a herd of elephants in the Amboseli National Park in Kenya known as the EB family — famous for their matriarch Echo before she died in 2009.

Using data collected over 38 years of watching this group, the researchers analyzed them for 26 types of behavior and found four personality features tended to emerge.

The strongest personality to emerge was that of the leader. Unlike other animals, where leadership tends to be won by the most dominant and aggressive individual, the elephants instead respected intelligence and problem solving in their leader. Echo, the matriarch and oldest in the group, her daughter Enid, and Ella, the second oldest female, all emerged as leaders.

The playful elephants tended to be younger but were more curious and active. Eudora, a 40-year-old female in the herd, seemed to be the most playful, consistently showing this feature throughout her life while playfulness in some of the other elephants declined with age.

Gentle elephants, which included two 27-year-old females Eleanor and Eliot, touched and rubbed against others more than the others.

Those that were reliable tended to be those that were most consistent at making good decisions, helped to care for infants in the herd and were calm when faced with threats. Echo and her youngest daughter Ebony seemed to be the most reliable.

Professor Lee said that elephants with these features tended to be the most socially integrated in the group while those who tended to be less reliable and pushy were more likely to split from the herd.

1.From the passage we get to know that ________.

A．the researchers reached their conclusion by analyzing the data

B．the research centered on the 26 types of behavior of the matriarch

C．the scientists conducted the research by comparing elephants with other animals

D．professor Phyllis Lee and her colleague spent nearly 38 years tracking the herd

2.According to the new findings of the scientists, ________.

A．playfulness of an elephant will always decline with age

B．those elephants which are caring and wise are most reliable

C．each elephant can be matched with only one of the four personalities

D．once becoming a member of a herd, an elephant will never split from it

3.In the EB family Echo and Eudora are ________.

A．mother and daughter                    B．two oldest females

C．the gentlest ones                       D．leader and member

 

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网