Critics of cloning often repeat the question related to the controversial(有爭(zhēng)議的) science “Just because we can, does it mean we should?”  The closer we come to being able to clone a human, the hotter the debate over it grows. For all the good things cloning may achieve, opponents say that it will do just as much harm. Another question is how to governing cloning process.
There is federal official law banning cloning in the United States, but several states have passed their own laws to ban the practice. The US Food and Drugs Administration(FDA), has also said that anyone in the United States attempting human cloning must first get its permission. In Japan, human cloning is a crime that is punished by up to 10 years in prison.
While laws are to ban cloning at this time, some scientists believe that the technology is not ready to be tested on humans. Ian Wilmut, one of the co-creators of Dolly, has even said that human cloning projects would be an irresponsible crime. Cloning technology is still in its early stages, and nearly 98% percent of cloning efforts end in failure. The embryos are either not suitable for implanting into the uterus(子宮) or they die shortly after birth.
The clones that do survive end up suffering from deadly or problematic genetic abnormalities(畸形). Some clones have been born with faulty heart, lung problems and blood vessel problems. One of the most famous cases was a cloned sheep that was born with but malformed arteries(畸形動(dòng)脈) leading to the lungs.
Opponents of cloning will point out that we can enthanize(安樂(lè)死) these faulty clones of other animals, but they ask what if a human clone is born with these same problems. Advocates of cloning respond that it is now easier to pick out faulty embryos even before they are implanted into the mother. The debate over human cloning is just beginning, but as science advances, it could be the biggest moral dilemma of the 21st century.
68. Which word in the text is the opposite of the underlined word “opponents”?
A. critics        B. advocates          C. scientists           D. co-creators
69. The writer writes this passage mainly to ________________.
A. support passing laws to ban human cloning
B. list problems with human cloning
C. introduce critics’ ideas about human cloning
D. state the debate over human cloning
70. Which of the following will Ian Wilmut probably NOT agree with?
A. Cloning technology is in its early stages.
B. Human cloning should be made illegal.
C. Very few cloning efforts are successful.
D. Cloning technology is ready to be tested on humans
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目:高中英語(yǔ) 來(lái)源:不詳 題型:完形填空


People wear hats for three main reasons: protection, communication, and decoration.
Protection. People first began to wear hats to ___1___ themselves from the climate. In hot, sunny climates, wide-edged hats provide ___2___ from the sun. In cold climates, people often wear wool hats. In some regions, people wear a variety of protective hats, ___3___ the season. They may wear a wool hat in winter, a rain hat in spring or fall, and a wide-edged hat in summer. Hats also provide protection in certain ___4___. Construction workers, football players, military personnel, and people in many other fields wear metal or plastic helmets(頭盔)for protection from ___5___.
Communication. Hats can communicate various things about the people who wear them. The hats of coal miners, cowboys and firemen indicate the wearer's ___6___. Students may wear a mortarboard (學(xué)位帽) to show they are graduating from high school or college.
Decoration. Most people wear a hat that they believe makes them look attractive, ___7___ the hat's main purpose may be protection or communication. Many protective hats are attractive and stylish. Even the caps of police officers and military personnel are designed to ___8___ the wearer's appearance. Certain decorative hats are worn as a (n) ___9___. In Scotland, for example, people wear a cap called a tam-o'-shanter that is part of their national costume (服裝). Many people change their style of hat from time to time because they feel more ___10___ when keeping up with the latest fashion.
1. A. defend     B. protect    C. prevent   D. hide
2. A. shade    B. shadow      C. security    D. cover
3. A. resulting from  B. basing upon  
C. relating to  D. depending on
4. A. seasons      B. climates     C. activities    D. communities
5. A. injury     B. destruction   C. harm   D. pollution
6. A. experience     B. occupation  C. personality  D. education
7. A. as   B. unless   C. though  D. because
8. A. change    B. increase   C. display   D. improve
9. A. tradition  B. label    C. honour     D. fashion
10. A. sociable    B. informal    C. attractive    D. noble

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:完形填空

完形填空(共20小題;每小題1分,滿(mǎn)分20分)
When someone has deeply hurt you, it can be extremely difficult to let go of your anger. But forgiveness is possible—and it can be surprisingly    16    to your physical and    17    health.
“People who always forgive others   18    less depression, anger and stress and more hopefulness,” says Frederic Luskin, Ph.D., the    19    of Forgive for Good. “So it can help    20    on the wear and tear on our organs, reduce the wearing out of the immune(免疫的) system and    21    people to feel more vital.”
So how do you start the forgiveness? Try    22    these steps:
Calm yourself. To defuse your    23   , try a simple stress-management technique. “Take a couple of breaths and think of    24    that gives you pleasure: a   25    scene in nature, someone you love,” Luskin says.
Don’t    26    an apology. “Many times the person who hurt you has no    27    of apologizing,” Luskin says. “They may have wanted to hurt you or they just don’t see things the same    28   . So if you wait for people to apologize you could be waiting a(n)   29    long time.” Keep in mind that forgiveness does not necessarily mean    30    to the person who upsets you.
Take the control away from your offender. Mentally replaying(重播) your    31    gives power to the person who caused you pain. “   32    focusing on your hurt feelings, learn to look for the love, beauty and kindness   33    you,” Luskin says.
Try to see things from the other person’s view. If you empathize(把感情移入) with that person, you may    34    that he or she was acting out of ignorance, fear—even love.
Recognize the benefits of forgiveness. Research has shown that people who always forgive others will get more energy, better    35    and better sleep.
Don’t forget to forgive yourself.“For some people, forgiving themselves is the biggest challenge,” Luskin says. But it can rob you of your self-confidence if you don’t do it.”
16. A. beneficial                 B. harmful                  C. helpless                 D. suitable
17. A. chemical                  B. wealthy                 C. technical               D. mental
18. A. own                           B. show                     C. direct                     D. prove 
19. A. author                      B. owner                    C. professor             D. publisher
20. A. protect                     B. save                      C. wait                        D. depend
21. A. have                          B. wish                        C. make                      D. allow
22. A. coping                      B. turning                   C. following              D. accepting
23. A. sadness                   B. anger                             C. hunger                   D. energy
24. A. something               B. anything                C. nothing                  D. everything
25. A. thoughtful               B. dull                          C. beautiful              D. still
26. A. call for                      B. hunt for                 C. long for                  D. wait for
27. A. invention                 B. invitation               C. intention              D. attention
28. A. way                          B. means                    C. method                     D. approach
29. A. helpfully                   B. carefully                 C. patiently                D. awfully 
30. A. giving in                  B. giving away C. giving up                D. giving out
31. A. wound                      B. hurt                       C. cut                          D. damage
32. A. Because of              B. Despite of             C. Instead of             D. In search of
33. A. around                     B. above                     C. beneath               D. below
34. A. tell                   B. realize                  C. see                            D. recognize
35. A. housing           B. appearance          C. figure                     D. appetite

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Games originally are entertainment. Contemporary games are very realistic and for this reason they are a source of great experience for the player and develop the imagination. Games are entertainment and even more than that. The statistics (統(tǒng)計(jì)) of the New York University led by Green claim that the player preferring active games get improvement of some types of brain activity. In particular, game players deal with problems of simultaneously (同時(shí)地) tracking several moving objects at the average level of 30% better than people who do not play active computer video games. The “gaming” violent experience may not be the cause of violent behavior in reality. None of the playing experience will become the priority in making important decisions concerning problems in real life. A game is an abstraction (虛擬物). A player gets abstract tasks and acts according to abstract rules.
Games are also the possibility to be however a person wants to he and to rest from the outside world for some time. But what if a person gets so much excited with the game scenes that he becomes violent in reality? Then, it proves that the games cause people to become violent in reality. But a psychologically healthy person will never confuse these two different worlds. A game is virtual world with visual images very similar to human. These images represent by themselves nothing but playing obstacles (障礙). A game may potentially give the opportunity to “destroy the obstacles” that may not be destroyed according to the rules but it is more about personal choice whether to do it or not. This leads us to the conclusion that violence is not a consequence but the cause. People who are originally trended to violence may get into a temper by games and perform violence in the “real world”. But in this case violence in games is a simple justification 理由) of the violent nature of the player.
49.The passage is          .
A.a(chǎn) story                                            B.a(chǎn) descriptive writing
C.a(chǎn)n argumentative writing          D.a(chǎn) scientific essay
50.In the first paragraph the author used the statistics to prove that         .
A.games can provide experience for the players
B.games can help develop player’s imagination
C.games can cause violent behavior
D.game are more than entertainment
51.What is the author’s attitude towards the “computer games”?[
A.“Violent games” can lead to the performance of violence in the real world.
B.Violence is not a consequence of the “computer games” but the cause.
C.Games are just entertainment and nothing more.
D.The virtual world and the real world are just the same.
52.The best title for this passage is         .
A.Violent games cause violence   B.Games: good or bad?
C.The cause of violence         D.The consequence of games

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解


We need to make better use of our resources. In developing countries we have more than enough, if we are less wasteful in our ways. Fortunately, we can improve. The challenge lies not so much with ‘technical fixes’ but with our approach to our world around us. In the recent past we were in a “Wild West” economy, supposing that there would always be enough resources. Now we know there are no new Earth to explore and exploit; one image to illustrate this is to think of Earth as a spaceship, where most materials have to be recycled. For us, “moving on” will be a case of leaving behind the throwaway society and advancing to a conserver society.
To qualify as citizens of a conserver society, we must change traditional attitudes and thinking. We need to recognize that there is not very often such a thing as “waste”, rather, there are materials which sometimes end up in the wrong place. The change has already begun. The European steel industry reuses scrap(廢棄的)metal, resulting in an energy saving of up to 50% . Recycling a glass container saves only 18%; but, in parts of the United States, a citizen buying a bottle of soda or beer now pays a deposit against return of the empty bottle.
If all drink containers in the USA were to be reused, the annual saving would be 0.5 million tons glass, plus about 50 million barrels of oil used in production processes. In Japan, OPEC promoted an increase in recycling of raw materials from 16% to 48% in just five years. In Norway, the price of a new car includes a disposal cost element of about 100 dollars, redeemable(可換成現(xiàn)款的)when the junked car is turned in at an approved receiving center.
Major new businesses are trying to exploit waste chemicals and oil. The Chinese claim to reuse 2.5 million tons of scrap iron and at least one million tons of waste paper each year. In the main, the conserver society depends on the commitment of individuals. But they can be encouraged by government incentive(鼓勵(lì)) and punishment, which should apply at least as strongly to industry and other commercial interests.
73  Which of the following best expresses the meaning of “a conserver society” in the second paragraph?
A. A wasteful society.
B. A society which thinks of  ways of recycling waste materials.
C. A society which keeps everything.
D. A society which saves electricity.
74  In the last paragraph, the author suggests governments _______.
A. depends on individuals to find ways of conserving energy.
B. find ways of encouraging those industries and individuals who conserve energy and of punishing those who don’t.
C. depend on companies to find ways of saving energy and rewarding workers
D. help establish businesses that will exploit waste materials
75  In this passage the author _______.
A. explains that meaning of the “Wild West” economy
B. tells us what recycled materials are.
C. teaches us how to recycle materials.
D. recommend a change in our use of resources strongly

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

People like to look in the mirror often when they have a young and beautiful face. However, when one grows old, nobody wants to see their wrinkled old face in the mirror any more. So, many old people seldom look at their faces in the mirror. This is completely wrong.
According to Wu Zhenyun, a professor from the Psychological Research Institute under the Chinese Academy of Sciences, a person’s willingness to look in the mirror can reflect his or her mentality. When people don’t care too much about their age, they will try to carry themselves with ease and natural poise (姿態(tài)). They don’t mind looking in the mirror to see their own faces. Some people even love to look in the mirror from time to time to see whether they keep a good appearance. In this way, mirror becomes their best friend that help them to look confident.
On the other hand, some people are afraid of being old. They don’t want to see the wrinkles on their face and their hair turning grey. So they don’t want to look in the mirror. This actually reflects a negative attitude they hold towards life. In the long term, they might suffer from psychological pressure or some sort of depression, which is actually not a wise act.
“ Everyone can make themselves look charming at every age stage. If one is confident, one will always look beautiful, it shows that they accept themselves.” professor Wu said.
Mirror cannot only give confidence to one. By looking in the mirror, one can even find the traces of some diseases from one’s own face.
67.Why does the mirror become the best friend for some people?
A. Because it brings much confidence to them.
B. Because it makes them more beautiful.
C. Because it tells whether they are clean or not.
D. Because it helps them find their own faults.
68.The fact that some people are afraid of looking in the mirror reflects that______.
A. they suffer from metal disease  B. they treat life in a negative way      
C. they are too ugly              D. they can’t bear the pressure of being old
69. The text tells us that______.
A. if you are willing to look in the mirror you are getting old
B. everyone can become attractive at any age
C. confidence can make a person look beautiful
D. old people will accept the reality when they are old
70. The writer wrote this passage to______.
A. advise people to look in the mirror constantly
B. reflect different attitude towards looking into a mirror
C. introduce a way of finding signs of disease from one’s face
D. analyze why people like and dislike to look in the mirror

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

What’s that smell? Do you hear that noise? Taste this! Look at me! Feel this, isn’t it soft? When you hear, or even use these phrases, you probably don’t stop to think about why we use them. Well, it’s because of our senses. Without us even knowing, our sense organs (nose, eyes, ears, tongue, and skin) are taking in information and sending it to the brain for processing. If we didn’t have them, we would not be able to smell, see, hear, taste, or touch anything!
Senses are the physical means by which all living things see, hear, smell, taste, and touch. Each sense collects information about the world and detects changes within the body. Both people and animals get all of their knowledge from their senses, and that is why senses are so important.
All senses depend on the working nerve system. Our sense organs start to work when something stimulates(刺激) special nerve cells, called receptors, in a sense organ. Once stimulated, the receptors send nerve impulses along sensory nerves to the brain. Your brain then tells you what to do. For example, your sound receptors are often attacked by billions of sound waves. When these signals reach the part of the brain called the cerebral cortex(大腦皮層), we become conscious of the sounds.
Our group really learned a lot about the senses while creating this website. We hope that you are able to get just as much out of it. Please feel free to comment about anything on the site by e-mailing us. Also, don’t forget to sign the guest book! Thanks for visiting our site. Come back soon!
60. This article is most probably taken from a _____.
A. newspaper                B. magazine                      C. website                      D. novel
61. Senses are very important because _____.
A. both people and animals get all of their knowledge from them
B. they are used to communicate with others
C. they can prevent the organs from being attacked
D. they can tell you what the stimulus is
62. Which of the following tells you what stimulate you?
A. The nerve cell.         B. The receptor.             C. The nerve impulse.   D. The brain.
63. According to this article, the following are all functions of the senses, EXCEPT _____.
A. collecting information about the world  
B. detecting changes within the body
C. sending nerve impulses to the brain 
D. serving the brain when needed

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Professional adventurer Mike Horn never met a challenge he didn’t welcome. In fact according to Horn, “The impossible exists only until we find a way to make it possible.”
As a child in Johannesburg, South Africa, Horn excelled at sports and loved adventure. But it wasn’t until he moved to Switzerland in 1990 that his life of adventure really began.
Horn had always loved sports and taking risks, and he was known for his crazy feats. He traveled in the South American Andes Mountains in the early 90s and then in 1997 crossed the entire continent on foot. He finished by floating 7,000 km down the Amazon River!
In 1999, H      orn began a solo trip around the world following the equator,without the use of any motor-powered transportation. When he finished successfully 17 months later, he became the first person to accomplish the feat.
Horn’biggest challenge to date came in 2006. He and a fellow adventurer walked from Russia to the North Pole in the sunless winter. Traveling through the winter darkness, he encountered polar bears and many other dangers.
In 2008, Horn began another unique adventure –one that will take four years to complete. Instead of trying to achieve more personal goals, Horn is now dedicated to sharing his knowledge and experience with others.
He calls his latest expedition the “Pangaea Expedition.”with “Pangaea” standing for “a Pan Global Adventure for Environmental Action.”By the end of this expedition, Horn will have traveled 100,000 km and crossed all of the continents and oceans. But this time he won’t be going alone: He’s choosing young people from around the world, aged 13 to 20, to accompany him. Twelve young men at a time will participate in one of 12 different projects, ranging from studying glaciers to treating water sources.
The journey will take place onboard Horn’s 35-meter saiboat , the Pangaea which will become a floating science class . Along with a team of scientists, Horn plans to teach the young explorers about protecting and preserving the earth.
In perhaps his most important expedition, Horn will pass down his passion for Earth’s wonders to the next generation.
64.Which of the following is NOT ture?
A. He met with polar bears and many dangers in 2006 when Horn walked to the North Pole with another adventurer.
B. He loved sports, Earth’s wonders and taking risks.
C. It took Horn 17 months to complete his solo trip around the world without any Motor-powered transportation.
D. He really began his life of adventure in te 1990s.
65. The underlined sentence probably means____________.
A. He was afraid of challengers                          B. He never met challengers
C.He didn’t welcome challengers                       D. He was willing to meet challengers
66. In his latest “Pangaea Expedition”, Horn__________.
A. will have covered 100,000km and crossed only all the continents
B. will choose young men to take part in the 12 different projects
C. will be going around the world by himself
D. intends to teach the young men how to make expeditions
67. What is the best title for the passage?
A. Mike Horn-an adventurer with a cause           B. The Pangaea Expedition
C. How Mike Horn makes expeditions.               D. How to make expeditions.

查看答案和解析>>

科目:高中英語(yǔ) 來(lái)源:不詳 題型:閱讀理解

Plants are very important living things. Life could not go on if there were no plants. This is because plants can make food from air,water and sunlight. Animals and man cannot make food from air,water and sunlight. Animals get their food by eating plants and other animals.Therefore animals and man need plants in order to live.This is why we find that there are so many plants around us.
If you look carefully at the plants around you,you will find that there are two kinds of plants:flowering plants and non-flowering plants.
Flowering plants can make seeds(種子). The seeds are protected by the fruits. Some fruits have one seed, some have two, three or four, and some have many seeds. But a few fruits have no seeds at all. An example of a fruit without seeds is the banana fruit. Most non-flowering plants do not grow from seeds. They grow from spores(胚芽). Spores are very small. Some spores are so small and light that they can float in the air. We may say that spores are quite the same as seeds. When these spores are all on wet and shady places, they usually grow into new plants.
72. The main idea of the first paragraph is that ______.
A. plants are important for life             B. plants cannot grow without air
C. there are many plants in the world      D. we can not live without water
73. Plants can make food from______.
A. flower, water and air                                        B. water, sunlight and air
C. air, water and soil                                                       D. air, sun and light
74. What can we infer from the passage ?
A. Of all living things animals are most important 
B.Spores are seeds
C. All fruits of flowering plants have seeds  
D.Without plants, man will die out
75. This passage may be taken from______.
A. a medicine book                      B. a novel
C. a science magazine                   D. an experiment report

查看答案和解析>>

同步練習(xí)冊(cè)答案