7.Which of the following might be the best title of the passage? A.Advantages and Disadvantages of Private Classes B.Who is to Blame.Parents or Schools? C.which is Better, School Study or Home Study D.The Relationship between Teachers and Children 查看更多

 

题目列表(包括答案和解析)

DNA is one of the most important discoveries in science. DNA is the plan for the human being, as a blueprint is the plan for a building. DNA makes a person look the way he does. A person’s DNA comes from a mixing of his parents’ DNA. That’s why a child looks like his parents. But, besides controlling things such as height and hair color, DNA can also give people diseases. Scientists are now studying DNA to cure diseases.
In the seventies, scientists developed a process called recombinant or RDNA. Although it sounds difficult to understand, RDNA simply means taking DNA from one animal or plant and putting it into another. By doing so, scientists can create new beings. In doing so, scientists can better understand DNA, especially what parts of DNA do what. After they understand DNA, scientists can begin to cure diseases. Often, the new being created will itself be the cure.   Besides curing diseases, RDNA research can also do other things. For example, scientists in Japan have already created “super-trees”. Trees help humans, because they take CO2, which poisons humans, from the air and turns it into oxygen, which lets humans breathe. “Super-trees” do this too, but do it much faster. As things such as cars and factories have already put much CO2 in the area, “super-trees” are badly needed.
Unfortunately, there is a serious danger in RDNA research. Scientists want to create animals to cure old diseases, but these new animals may also create new diseases. It will be a serious problem if the animals escape from the science laboratory and into nature. As these animals are not natural, they may let loose many new powerful diseases.
As a result, RDNA research will create many solutions, but it will also create many problems.
【小题1】 From the passage, we can know that a boy looks like his parents because______.

A.he is son of his parents.
B.his parents’ DNA decides his appearance.
C.he has received DNA from his father or his mother.
D.scientists have put some of his parents’ DNA into him.
【小题2】What does the underlined expression “let loose” probably mean?
A.let … go freeB.get rid of
C.absorbD.survive
【小题3】 What is the best title for the passage?
A.The DNA Research in Japan
B.A New Way of DNA Research in Japan.
C.The Causes and Effects of DNA Research
D.The Advantages And Disadvantages of RDNA
【小题4】 The following statements are true about RDNA research EXCEPT ______.
A.the research has been stopped because the created animals carry viruses
B.“super-trees” might be widely planted around the world
C.scientists have not completely understood DNA
D.RDNA research will benefit human beings a lot
【小题5】You might find this passage in / on a ________.
 
A.fashion magazineB.novelC.scientific newspaperD.sports newspaper

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Due to the increasing number of violence acts produced in schools all over the world,more and more parents prefer to have their children educated at home rather than at school. This way they can assure their safety and well-being,although teachers and school representatives are trying to improve the situation in schools by increasing the number of the persons in charge with the safety of the students.

The main reason for violence acts are the films and cartoons that fill the children’s time.They want to do everything.they watch on TV and never think at the consequences,and they may hurt a classmate or a teacher.

On the other hand, parents are not fully satisfied with the children’s results obtained in classes and they consider private classes would have better results.

When a teacher has to watch 30 students in class he can’t probably see what each of them is doing,how he is writing,or if he understands the explanations.At home the teacher can explain in details everything the child doesn’t understand as many times as he considers proper.

And many times.the child grows fond of the teacher at home,who becomes his best friend,and who helps him whenever he needs someone to talk to.    

However, the best solution would be a mixture between the education received at school and that at home,because school makes children communicate and socialize.Keeping a child at home for fear there might happen something bad to him.only makes the child’s character weak and prevents him from knowing what real life is.Staying in a crystal ball only does harm to the child.

All in all.schools have been created to help children,not to harm them,so it’s best to keep children in these special places,where they learn,laugh,have fun and make new friends.

1.The writer’s purpose in writing the text is to          

A.teach parents the ways to keep theft children safe

B.show solutions to developing children’s character

C.explain the main reason for violence acts in schools

D.analyze an education problem and give opinions

2.Parents prefer to have their children educated at home because the following EXCEPT that______.

A.More and more violence acts occur in schools

B.Parents want to improve their Children's grades

C.Parents are concerned about their children’s safety

D.The education system is far from satisfactory

3.What does“a crystal ball”in the passage refer to?

A.A toy that can be used for entertainment.

B.A safe and comfortable environment.

C.An object that is made of crystal.

D.A setback that is hard to overcome.

4.We call infer from the passage that          

A.violence TV programs have bad effects on children’s behavior

B.The teacher at home is more patient than the teacher at school

C.Children today are weak from lack of sense of right and wrong

D.There are too many students in class for a teacher to teach

5.Which of the following might be the best title of the passage?

A.Advantages and Disadvantages of Private Classes

B.Who is to Blame, Parents or Schools?

C.Which is Better, School Study or Home Study

D.The Relationship between Teachers and Children

 

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In summer, millions of people will head for the beach. And while the ocean can be a great place to swim and play, it may also be useful in another way. Some scientists think that waves could help make electricity.

“Have you ever been on a surfboard or boat and felt yourself being lifted up by a wave? Or have you jumped in the water and felt the energy as waves crashed over you?” asked Jamie Taylor of the Wave Energy Group at the University of Edinburgh in Scotland.“There is certainly a lot of energy in waves.”

Scientists are working on using that energy to make electricity.

Most waves are created when winds blow across the ocean.“The winds start out by making little ripples (波纹) in the water, but if they keep on blowing , those ripples get bigger and bigger and turn into waves, ”Taylor said.“Waves are one of nature’s ways of picking up energy and then sending it off on a journey.”

When waves come towards the shore, people can set up dams or other barricades to block the water and send it through a large wheel called a turbine (涡轮) .The turbine can then power an electrical generator (发电机) .

The United States and a few other countries have started doing research on wave energy , and it is already being used in Scotland.

The resource is huge.We will never run out of wave power, besides, wave energy does not create the same pollution as other energy sources, such as oil and coal.

Oceans cover three quarters of the earth’s surface.That would make wave power seem perfect for creating energy around the world.There are some drawbacks, however.

Jamie Taylor said that wave power still cost too much money.He said that its effects on animals in the sea were still unknown.Plus, wave power would get in the way of fishing and boat traffic.

With more research, however, “many of these problems might be overcome,” Taylor said.“Demand for energy to power our TVs and computers, drive our cars, and heat and cool our homes is growing quickly throughout the world.Finding more energy sources is very important, for traditional sources of energy like oil and gas may run out some day.”

In the future, when you turn on a light switch, an ocean wave could be providing the electricity!

68.Which of the following is NOT true?

A.Wave power costs too much money.

B.Wave energy creates the same amount of pollution as other energy sources.

C.Wave power affects fishing and boat traffic.

D.Wave power may affect marine animals.

69.We can infer from the passage that ______.

A.finding more new energy sources is not necessary because of wave energy

B.wave energy is a resource that will never run out and is used all over the world

C.wave power is perfect for creating energy around the world

D.wave power doesn’t create any pollution

70.The underlined word “drawbacks” probably means ______.

A.regrets      B.adventures       C.disadvantages          D.difficulties

71.What can be the best title for the passage? 

A.How to Get Electricity by Waves.       B.The Advantages of Wave Energy.

C.Can Waves Make Electricity?  D.The Disadvantages of Wave Energy.

 

查看答案和解析>>

In summer, millions of people will head for the beach. And while the ocean can be a great place to swim and play, it may also be useful in another way. Some scientists think that waves could help make electricity.

“Have you ever been on a surfboard or boat and felt yourself being lifted up by a wave? Or have you jumped in the water and felt the energy as waves crashed over you?” asked Jamie Taylor of the Wave Energy Group at the University of Edinburgh in Scotland.“There is certainly a lot of energy in waves.”

Scientists are working on using that energy to make electricity.

Most waves are created when winds blow across the ocean.“The winds start out by making little ripples (波纹) in the water, but if they keep on blowing , those ripples get bigger and bigger and turn into waves, ”Taylor said.“Waves are one of nature’s ways of picking up energy and then sending it off on a journey.”

When waves come towards the shore, people can set up dams or other barricades to block the water and send it through a large wheel called a turbine (涡轮) .The turbine can then power an electrical generator (发电机) .

The United States and a few other countries have started doing research on wave energy , and it is already being used in Scotland.

The resource is huge.We will never run out of wave power, besides, wave energy does not create the same pollution as other energy sources, such as oil and coal.

Oceans cover three quarters of the earth’s surface.That would make wave power seem perfect for creating energy around the world.There are some drawbacks, however.

Jamie Taylor said that wave power still cost too much money.He said that its effects on animals in the sea were still unknown.Plus, wave power would get in the way of fishing and boat traffic.

With more research, however, “many of these problems might be overcome,” Taylor said.“Demand for energy to power our TVs and computers, drive our cars, and heat and cool our homes is growing quickly throughout the world.Finding more energy sources is very important, for traditional sources of energy like oil and gas may run out some day.”

In the future, when you turn on a light switch, an ocean wave could be providing the electricity!

68.Which of the following is NOT true?

A.Wave power costs too much money.

B.Wave energy creates the same amount of pollution as other energy sources.

C.Wave power affects fishing and boat traffic.

D.Wave power may affect marine animals.

69.We can infer from the passage that ______.

A.finding more new energy sources is not necessary because of wave energy

B.wave energy is a resource that will never run out and is used all over the world

C.wave power is perfect for creating energy around the world

D.wave power doesn’t create any pollution

70.The underlined word “drawbacks” probably means ______.

A.regrets      B.adventures       C.disadvantages          D.difficulties

71.What can be the best title for the passage? 

A.How to Get Electricity by Waves.       B.The Advantages of Wave Energy.

C.Can Waves Make Electricity?  D.The Disadvantages of Wave Energy.

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Due to the increasing number of violence acts produced in schools all over the world, more and more parents prefer to have their children educated at home rather than at school.This way they can assure their safety and well-being.Teachers and school representatives are trying to improve the situation in schools by increasing the number of the persons in charge of the safety of the students.

    The main reason for violence acts are the films and cartoons that fill the children’s time.They want to do everything they watch on TV and never think of the consequences, they may hurt a classmate or a teacher.On the other hand, parents are not fully satisfied with the children’s results obtained in classes and they consider private classes would have better results.When a teacher is obliged to watch 30 students in class he can’t probably see what each of them is doing, how he is writing, or if he understood the explanations.At home the teacher can explain in details everything the child doesn’t understand as many times as he considers proper.

    Many times, the child grows fond of the teacher at home, who becomes his best friend, and who helps him whenever he needs someone to talk to.However, the best solution would be a mixture between the education received at school and that at home.School makes children communicate and socialize.Keeping a child at home for fear something bad might happen to him, only makes the child’s character weak and prevents him from knowing what real life is.Staying in a crystal ball only does harm to the child.

   All in all, schools have been created to help children, not to harm them, so it’s best to keep children in these special places, where they learn, laugh, have fun and make new friends.

1.The writer’s purpose in writing the text is to            

A.teach parents the ways to keep the children safe

show solutions to developing children’s character

C.explain the main reason for violence acts in schools

D.analyze an education problem and give opinions

2.Which of the following might be the best title of the passage?

A.Advantages and Disadvantages of Private Classes

Who is to Blame, Parents or Schools?

C.which is Better, School Study or Home Study?

D.The Relationship between Teachers and Children

3.What does “a crystal ball” in the passage refer to?

A.A toy that can be used for entertainment.

A safe and comfortable environment.

C.An object that is made of crystal.

D.A setback that is hard to overcome.

4.We call infer from the passage that            

A.violence TV programs have bad effects on children’s behavior

the teacher at home is more patient than the teacher at school

C.children today are weak from lack of sense of right and wrong

D.there are too many students in class for a teacher to teach

 

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