The scientific world continues to be amazed by the speed of the development of cloning. Some scientists now suggest that the cloning of humans could occur in the near future. Despite the benefits of cloning, however, certain ethical (道德的) questions concerning the possible abuse (滥用) of cloning have been raised. At the heart of these questions is the idea of humans influencing life in a way that could harm society, either morally or in a real physical sense. Some people object to cloning because it allows scientists to "act like God" in the handling of living organisms.
The cloning of Dolly raised the debate over this practice to a whole new level. It has become obvious that the technology for cloning Dolly could also be used to clone humans. A person could choose to make two or ten or a hundred copies of himself or herself by the same techniques used with Dolly. An active debate about the morality of cloning humans arises. Some people see benefits from the practice, such as providing a way for parents to produce a new child to replace one dying of a fatal disease. Other people worry about humans taking into their own hands the future of the human race.
At the beginning of the twenty-first century, many scientists say the controversy over the ethics of cloning humans is overstressed because of the unpredictability (不可预测性) of cloning in general. While scientists have cloned animals such as sheep, mice, cows, pigs, and goats, fewer than 3 percent of all those cloning efforts have succeeded. The animal clones that have been produced often have health problems. Scientists believe the rapid reprogramming in cloning can introduce random (任意的) errors into a clone’s DNA. Those errors have altered individual genes in minor ways, and the genetic defects (缺陷) have led to the development of major medical problems. Some scientists say this should make human cloning out of the question, but others argue that cloning humans may actually be easier and safer than cloning animals. Whatever, I agree that further research in the field of cloning is needed.
1.Some people are against cloning of humans because they think _________.
A.the practice takes too much time and money B.the cloning technology is still not mature C.humans control the future of the human race D.the population in the world will be too large
2.Some scientists think the debate over ethics of cloning humans is overstressed because ____.
A.cloning of human beings is completely impossible B.the result of cloning can’t be predicted in general C.cloning of animals is a failure D.there are big errors in a clone’s DNA
3.We can learn from the text that _______.
A.cloning of humans is a very controversial issue B.the cloning of Dolly begins to raise the debate over cloning of humans C.there are medical problems in cloning animals D.cloning humans is easier and safer than cloning animals
4.The text is mainly about _______.
A.the benefits of cloning B.the ethics of cloning C.the history of cloning D.the defects of cloning
高二英语阅读理解中等难度题
The scientific world continues to be amazed by the speed of the development of cloning. Some scientists now suggest that the cloning of humans could occur in the near future. Despite the benefits of cloning, however, certain ethical (道德的) questions concerning the possible abuse (滥用) of cloning have been raised. At the heart of these questions is the idea of humans influencing life in a way that could harm society, either morally or in a real physical sense. Some people object to cloning because it allows scientists to "act like God" in the handling of living organisms.
The cloning of Dolly raised the debate over this practice to a whole new level. It has become obvious that the technology for cloning Dolly could also be used to clone humans. A person could choose to make two or ten or a hundred copies of himself or herself by the same techniques used with Dolly. An active debate about the morality of cloning humans arises. Some people see benefits from the practice, such as providing a way for parents to produce a new child to replace one dying of a fatal disease. Other people worry about humans taking into their own hands the future of the human race.
At the beginning of the twenty-first century, many scientists say the controversy over the ethics of cloning humans is overstressed because of the unpredictability (不可预测性) of cloning in general. While scientists have cloned animals such as sheep, mice, cows, pigs, and goats, fewer than 3 percent of all those cloning efforts have succeeded. The animal clones that have been produced often have health problems. Scientists believe the rapid reprogramming in cloning can introduce random (任意的) errors into a clone’s DNA. Those errors have altered individual genes in minor ways, and the genetic defects (缺陷) have led to the development of major medical problems. Some scientists say this should make human cloning out of the question, but others argue that cloning humans may actually be easier and safer than cloning animals. Whatever, I agree that further research in the field of cloning is needed.
1.Some people are against cloning of humans because they think _________.
A.the practice takes too much time and money B.the cloning technology is still not mature C.humans control the future of the human race D.the population in the world will be too large
2.Some scientists think the debate over ethics of cloning humans is overstressed because ____.
A.cloning of human beings is completely impossible B.the result of cloning can’t be predicted in general C.cloning of animals is a failure D.there are big errors in a clone’s DNA
3.We can learn from the text that _______.
A.cloning of humans is a very controversial issue B.the cloning of Dolly begins to raise the debate over cloning of humans C.there are medical problems in cloning animals D.cloning humans is easier and safer than cloning animals
4.The text is mainly about _______.
A.the benefits of cloning B.the ethics of cloning C.the history of cloning D.the defects of cloning
高二英语阅读理解中等难度题查看答案及解析
Abralda, one of the largest coral reefs in the world, is truly an amazing place for scientific research. 1.
However, when we arrived there, things didn’t go as smoothly as expected. It was raining so hard that we couldn’t dive into the sea for reseach. What’s worse, we didn’t know how long we had to wait. 2. We did hope it would stop raining soon.
Since we couldn’t dive, we stayed on our boat that was meant to keep track of us when we were diving. 3. We dived quickly down in depth into a warm and colourful place. Meanwhile, the boat was following us all the way.
There were various sea creatures swimming around us. Interestingly, I was joined by a turtle which stayed on ray mask for a while. And it followed me during the rest period of my dive. 4. I was amazed and even shocked! Beautiful living coral covered nearly 100 percent of the bottom! Besides the turtle, many more sea animals passed by me closely. It was so fun. All stress, noise and troubles of life were left at the surface of the sea.
5. I dived for as long as I could that day. This was how I felt about Abralda—I loved it and never wanted to leave. In fact, we are already planning another diving research in Abralda.
A. It made us disappointed and upset.
B. We were dissatisfied and decided to leave there.
C. However, we had to do research on wildlife there.
D. I looked around to explore the fantastic underwater world.
E. Exploring so well underwater, I was unwilling to leave the sea.
F. Luckily, the rain stopped on the fourth day,and we went diving.
G. Therefore, we went to study and record the wildlife there months ago.
高二英语七选五简单题查看答案及解析
By speeding up reforms the UN is trying to live up to the wishes of people around the world and __________ more to building world peace.
A. contribute B. link C. expose D. attend
高二英语单项填空中等难度题查看答案及解析
Thanks to the advice _______ by the experts, we finished our task at an amazing speed.
A.preserved | B.equipped | C.provided | D.directed |
高二英语单项填空中等难度题查看答案及解析
Get a taste of the amazing world of engineering
Do you want to help shape the future of everything from entertainment and transport to sport and the environment? Then you might want to think about the fascinating world of engineering. Tomorrow's Engineers Week is running 4-8 February 2020, and is the perfect time to get an idea of what engineering is all about.
Engineers are the people who use scientific knowledge, ranging from long-established scientific laws to cutting-edge discoveries, to solve problems and improve life for all of us. Tomorrow's Engineers Week aims to get young people interested in this exciting career. It also wants to change the way we think about engineers.
One place to find out more about engineers is the website thisisengineering.org.uk, where you can meet 16 young engineers with amazing and different jobs. There's Halvard, who builds farm robots; and Olivia, who uses her chemical engineering skills to create soaps and shampoos kind to the skin and the environment. Alice digs train tunnels deep underground. Michelle builds rides. As a child, she loved these thrilling rides. At the age of 14, she attended a lecture on roller coaster design, and then she realized that engineering was a great way to turn her passion into her career.
If you want to meet some inspirational engineers, ask if your school has signed up to take part in the Big Assembly (大型集会) on 6 February. Don't worry if not, though, you can check it out yourself afterwards on the tomorrowsengineers.org.uk website.
1.The goal of Tomorrow's Engineers Week is to________.
A.introduce young engineers
B.announce the latest discoveries
C.show the future work of engineers
D.attract the youth' s interest in engineering
2.Which of the engineers fancies building roller coasters?
A.Halvard. B.Olivia.
C.Alice. D.Michelle.
3.What is the main purpose of the passage?
A.To explain what engineering is all about.
B.To advertise Tomorrow's Engineers Week.
C.To encourage schools to sign up for an assembly.
D.To introduce the website thisisengineering.org.uk.
高二英语阅读理解简单题查看答案及解析
We all know that the cost of heating our homes will continue to be a significant burden on the family budget. Now millions of people are saving on their heating bills with the EP Portable Heater. With over one million satisfied customers around the world, the new EP heats better and faster, saves more on heating bills, and runs almost silently.
The EP has no exposed heating parts that can cause a fire. The outside of the EP only gets warm to the touch so that it will not burn children or pets.
The EP will not reduce oxygen in the room. With other heaters, you’ll notice that you get sleepy when the heat comes on because they are burning up oxygen.
The advanced EP also heats the room evenly, wall to wall and floor to ceiling. It comfortably covers an area of up to 350 square feet. Other heaters heat rooms unevenly with most of the heat concentrated to the center of the room. They only heat an area a few feet around the heater. With the EP, the temperature will not vary in any part of the room.
The EP comes with a 3-year warranty (保修) and a 60-day unconditional refund.
Now, we have a special offer for 10 days, during which you can enjoy a half price discount and a free delivery. If you order after that, we reserve the right to either accept or reject order requests at the discounted price.
Take action right now!
1.What is mainly discussed in Paragraph 2?
A. the heat of the EP
B. the safety of the EP
C. the appearance of the EP
D. the material of the EP
2.From the passage, we can learn that the EP _________.
A. doesn’t burn up oxygen
B. runs without any noise
C. makes people get sleepy
D. is unsuitable for children and pets
3.The underlined word “evenly” in Paragraph 4 probably means _________.
A. continuously B. separately
C. quickly D. equally
4.The main purpose of the passage is to _________.
A. persuade people to buy the product
B. advise people to save on heating bills
C. report the new development of portable heaters
D. compare the functions of different heater brands
高二英语阅读理解中等难度题查看答案及解析
EP Portable Heater
We all know that the cost of heating our homes will continue to be a significant burden on the family budget. Now millions of people are saving on their heating bills with the EP Portable Heater. With over one million satisfied customers around the world, the new EP heats better and faster, saves more on heating bills, and runs almost silent.
The EP has no exposed heating parts that can cause a fire. The outside of EP only gets warm to the touch so that it will not burn children or pets.
The EP will not reduce oxygen in the room. With other heaters, you'll notice that you get sleepy when the heat comes on because they are burning up oxygen.
The advanced EP also heats the room evenly, wall to wall and floor to ceiling. It comfortably covers an area up to 350 square feet. Other heaters heat rooms unevenly with most of the heat concentrated to the center of the room. And they only heat an area a few feet around the heater. With the EP, the temperature will not vary in any part of the room.
The EP comes with a 3-year warranty (保修) and a 60-day, no questions asked, satisfaction guarantee. If you are not totally satisfied, return it at our expense and your money will be given back to you.
Now, we have a special offer for 10 days, during which you can enjoy a half price discount and a free delivery. If you order after that, we reserve the right to either accept or reject order requests at the discounted price.
Take action right now!
1.What is mainly discussed in paragraph 2?
A. The heat of the EP. B. The safety of the EP.
C. The appearance of the EP. D. The material of the EP.
2.From the passage, we can learn that the EP ________.
A. doesn't burn up oxygen B. runs without any noise
C. makes people get sleepy D. is unsuitable for children and pets
3.The underlined word "evenly" in paragraph 4 probably means ________.
A. equally B. separately
C. quickly D. continuously
4.The main purpose of the passage is to ________.
A. persuade people to buy the product
B. advise people to save on heating bills
C. report the new development of portable heaters
D. compare the difference of different heater brands
高二英语阅读理解中等难度题查看答案及解析
It’s true that quite a few most respected scientific authorities have confirmed that the world is becoming hotter and hotter. There’s also strong evidence that humans are contributing to the warming. Countless recent reports have proved the same thing. For instance, a 2010 summary about the climate science by the Royal Society noted that: “The global warming over the last half-century has been caused mainly by human activity.”
You may not believe that humans could change the planet’s climate, but the basic science is well understood. Each year, billions of tons of greenhouse gases are released into the atmosphere because of human activity. As has been known for years, these gases hold heat that would otherwise escape to space, wrapping the planet in an invisible (看不见的) blanket.
Of course, the earth’s climate has always been changing due to “natural” factors such as volcanic eruption or changes in solar, or cycles concerning the Earth’s going around the sun. According to the scientific research, however, the warming observed by now matches the pattern of warming we would expect from a build-up of greenhouse gas in the atmosphere – not the warming we would expect from other possible causes.
Even if scientists did discover another reasonable explanation for the warming recorded so far, that would give birth to a difficult question. As Robert Henson puts it: “If some newly discovered factor is to blame for the climate change, then why aren’t carbon dioxide and the other greenhouse gases producing the warming that basic physics tells us they should be?”
The only way to prove with 100% certainty that humans are responsible for global warming would be to run an experiment with two identical Earths – one with human influence and one without. That obviously isn’t possible, and so most scientists are careful not to state human influence as an absolute certainty.
1.In most scientists’ opinion, the global warming is mainly caused by ________.
A.solar activity B.volcanic activity
C.natural factors D.human factors
2.The text is developed by ________.
A.giving typical examples
B.following the order of space
C.analyzing a theory and arguing it
D.comparing and finding differences
3.The underline word “identical” in the last paragraph probably means ________.
A.totally different B.exactly the same
C.extremely important D.partly independent
4.Which of the following is not the cause of climate change?
A.volcanic eruption
B.cycles concerning the Earth’s going around the sun
C.changes in solar
D.floods and droughts
5.Which of the following can be the best title?
A.Are All the Scientists Really Scientific?
B.Where Is Global Warming Leading Us to?
C.Are Humans Definitely Causing Global Warming?
D.What’s the Relation of Global Warming and Greenhouse Gases?
高二英语阅读理解中等难度题查看答案及解析
As the world's resources become rarer because of continuing land development and the growing human population, the natural habitats of wild animals have continued to decrease. As a result, the survival of some species of wildlife is threatened. To help protect wildlife, a lot of practices should be carried out by environmentalist as well as the general public.
Create homes for species that are endangered because of losing their own natural habitats. Wildlife shelters should be developed, and habitats should be created in existing(现存的) national parks. Efforts(努力) should also be made to protect existing habits, such as providing food and water sources and limiting hunting. Breed(培育) endangered species in places such as zoos. Once the young animals grow up, they can be set free into the wild where they can continue to increase the population.
The general public may not realize that a species is endangered until it's too late. Educational programs making use of TV advertising and instructional meetings at national parks can be used to make the public know the situation.
The general public can help protect the wildlife by not hunting wild animals for sport or for a source of food. They should also stop supporting those who earn money from the illegal hunting of wild animals, such as hunters who kill animals for the only purpose of harvesting their body parts and selling them for money.
The public should avoid(避免) keeping wild animals as pets. This will limit the number of animals being tracked, trapped, sold and removed from their natural habitat.
1.Which of the following is not the measure of protecting animal habitats?
A.Developing wildlife shelters.
B.Creating new habitats.
C.Setting young animals free in the wild.
D.Protecting the existing habitats.
2.The underlined words "the situation" in Paragraph3 probably refer to the fact that ______.
A.the general public may not know species are endangered.
B.many endangered species are facing the danger of extinction.
C.people can do much to protect the endangered species.
D.human activities can affect the existence of species.
3.We can learn from the passage that _______.
A.some people hunt animals and sell them as pets
B.hunters get little money from hunting animals
C.general public do nothing about protecting the wildlife now
D.animal population becomes larger in the zoo
4.In which column(栏) of a newspaper can we read the passage?
A.Environment. B.Sports.
C.Technology. D.Education.
高二英语阅读理解简单题查看答案及解析
Half of the world’s population is affected by Asian monsoons(季风), but monsoons are difficult to predict. American researchers have put together a 700-year record of the rainy seasons, which is expected to provide guidance for experts making weather predictions.
Every year, moist (潮湿的)air masses,known as monsoon,produce large amounts of rainfall in India, East Asia, Northern Australia and East Africa. All this wet air is pulled in by a high pressure area over the Indian Ocean and a low pressure area to the south.
According to Edward Cook , a weather expert at Columbia University in New York., the complex nature of the climate systems across Asia makes monsoons hard to predict. In addition, climate records for the area are too recent and not detailed enough to be of much use. Therefore, he and a team of researchers spent more than fifteen years traveling across Asia, looking for trees old enough to provide long-term records. They measured the rings, or circles, inside thousands of ancient trees in more than 300 places.
Rainfall has a direct link to the growth and width of rings on some kinds of trees. The researchers developed a document they are calling a Monsoon Asia Drought Atlas. It shows the effect of monsoons over seven centuries, beginning in the 1300s.
Professor Cook says the tree-ring records show periods of wet and dry weather. “If the monsoon basically fails or is a very weak one, the trees affected by monsoons at that location might put on a very narrow ring. But if the monsoon is very strong, the trees affected by that monsoon might put on a wide ring for that year. So, the wide and narrow ring widths of the chronology that we developed in Asia provide us with a measure of monsoon variability.” With all this information, researchers say they can begin to improve computer climate models for predicting the behavior of monsoons.
“There has been widespread famine and starvation and human dying in the past in large droughts. And on the other hand, if the monsoon is particularly heavy, it can cause extensive flooding.” said Eugene Wahl, a scientist with America’s National Oceanic and Atmospheric Administration. “So, to get a sense of what the regional moisture patterns have been, dryness and wetness over such a long period of time in great detail, I would call it a kind of victory for climate science.”
1.What’sthe passage mainly about?
A. The effects of Asian monsoons.
B. A breakthrough in monsoon prediction.
C. The achievements of Edward cook.
D. The necessity of weather forecast.
2. It is difficult for experts to predict Asian monsoons because_________
A. it is hard to keep long-term climate records.
B. they are formed under complex climate systems.
C. they influence many nations.
D. there is heavy rainfall in Asia.
3.What can be inferred from the passage?
A. Long and details climate records can offer useful information for monsoon research.
B. The Monsoon Asia Drought Atlas has a monsoon record for about 1,300 years.
C. The trees affected by monsoon grow fast if the monsoon is weak.
D. The rainfall might be low although the monsoon is strong in monsoon-affected areas.
4.What do we know about the research according to Eugene Wahl?
A. It will help people prevent droughts and floods.
B. It should include information about human life in the past.
C. It has analyzed moisture models world wide,
D. It is a great achievement in climate science.
5.Which of the following best describes the tone of this passage?
A. Humorous B. Pessimistic
C. Matter-of –fact D. Friendly.
高二英语阅读理解中等难度题查看答案及解析