暑假作業(yè)海燕出版社系列答案科目：高中英語 來源： 題型：閱讀理解
How do you feel after you've stayed up late to finish schoolwork? Or the day after a slumber party? Scientists now say that your answers to these questions may depend on your genes.
Genes are stretches of DNA that work like an instruction manual for our cells. Genes tell our bodies and brains what to do. People have about 40,000 genes, and each gene can have different forms. So, for example, certain forms of some genes make your eyes blue. Other versions of those genes make your eyes brown.
In a similar way, new research suggests that a gene called period3 affects how well you function without sleep. The discovery adds to older evidence that period3 helps determine whether you like to stay up late or get up early.
The period3 gene comes in two forms: short and long. Everyone has two copies of the gene. So, you may have two longs, two shorts, or one of each. Your particular combination depends on what your parents passed on to you.
Scientists from the University of Surrey in England studied 24 people who had either two short or two long copies of period3. Study participants had to stay awake for 40 hours straight. Then, they took tests that measured how quickly they pushed a button when numbers flashed on a screen and how well they could remember lists of numbers.
Results showed that the people with the short form of period3 performed much better on these tests than the people with the long form did. In both groups, people performed worst in the early morning. That's the time when truck drivers and other night-shift workers say they have the most trouble concentrating.
After the first round of experiments, participants were finally allowed to sleep. People in the group that performed well on the tests took about 18 minutes to nod off.
People with the long period3 gene, by contrast, fell asleep in just 8 minutes. They also spent more time in deep sleep. That suggests that people with the long form of the gene need more and deeper sleep to keep their brains working at top form.
We can know from the passage that genes can not ________.
A. tell our bodies and brains what to do
B. make our eyes blue or brown
C. decide how well you work without sleep
D. ensure whether you’re good at driving
Which of the following statements about the period3 is wrong?
A. It affects whether you like to stay up late or get up early.
B. It comes in two forms: short and long.
C. One has either two longs or two shorts of it.
D. Your parents determine what particular combination you have.
People with the short form of period3__________.
A. need to go to bed early and get up early
B. can work better than the people with long form of period3 without sleep
C. take less time to fall asleep after they stay up late
D. need more and deeper sleep to keep their brains working at top form
What’s the best title of the passage?
A. The Period3 Gene B. The Function of Genes
C. Wake up, Sleepy Gene D. Stay up Late or Get up Early?
查看答案和解析>>
科目：高中英語 來源：2013屆四川省成都市高二5月月考英語試卷（解析版） 題型：完型填空
As I understand, if scientists produced a human clone, there would be a great risk of it having a disease. Nobody seems to understand the ageing process of a clone. It would be terrible if a baby was the age of its parent at 31 . Its cells would grow old fast and it would die young. 32 until the technique is perfectly safe, it should be 33 .
I'd love to have a clone of 34 . I often wish I had a twin sister, someone who 35 me in everything. So why not a clone? Well, the idea 36 be fun but I'm not sure if it would be 37 . I think we would be playing with fire if we let scientists go ahead with 38 cloning. There are so many 39
involved that all research in this area should be strictly controlled.
There are so many arguments 40 cloning that it is difficult to get anyone to consider the possible benefits. I am 41 that it is a technique which could be beneficial. The most obvious use would be for childless 42 . They would be able to have babies with their own genetic material. I don't see what's wrong with that.
Imagine a child 43 up knowing that his or her mother is really a sister or a brother. The emotional 44 on the child would be 45 . Or a child who was cloned from a dead brother or sister. What kind of emotional pressure would they feel, knowing they were made as a replacement for another? The whole idea
46 me!
It's all very good to ban human cloning but scientists should be allowed to 47
research. If they don't, we may 48 important benefits for our society, such as producing body organs. A clone is an 49 copy of a person with the same gene. Therefore, it is the 50 donor for an organ(器官) transplant.
|
1. |
|
|
2. |
|
|
3. |
|
|
4. |
|
|
5. |
|
|
6. |
|
|
7. |
|
|
8. |
|
|
9. |
|
|
10. |
|
|
11. |
|
|
12. |
|
|
13. |
|
|
14. |
|
|
15. |
|
|
16. |
|
|
17. |
|
|
18. |
|
|
19. |
|
|
20. |
|
查看答案和解析>>
科目：高中英語 來源：廣東省2010屆高三考前熱身英語試題 題型：閱讀理解
Ⅲ 閱讀(共兩節(jié)，滿分40分)
第一節(jié) 閱讀理解(共15小題；每小題2分，滿分30分)
閱讀下列短文，從每題所給的A、B、C和D項中，選出最佳選項，并在答題卡上將該項涂黑。
Is a mouse that can speak acceptable? How about a dog with human hands or feet? Scientists, the people with the know-how to make such things happen, are now thinking about whether such experiments are morally right or not.
On Nov. 10, Britain’s Academy of Medical Sciences launched a study on the use of animals with human materials in scientific research. The work is expected to take at least a year, but its leaders hope it will lead to guidelines for scientists in Britain and around the world on how far they can go mixing human genes into animals in search of ways to fight human diseases.
“Do these constructs (構(gòu)想) challenge our idea of what it is to be human?” asked Martin Bobrow, a professor of medical genetics at Cambridge University and chair of a 14-member group looking into the issue. “It is important that we consider these questions now so that appropriate boundaries are recognized.”
Using human material in animals is not new. Scientists have already created monkeys that have a human form of the Huntingdon’s gene so they can study how the disease develops; and mice with livers (肝) made from human cells are being used to study the effects of new drugs.
However, scientists say the technology to put ever greater amounts of human genetic material into animals is spreading quickly around the world --- raising the possibility that some scientists in some places may want to go further than is morally acceptable.
Last year in Britain there was a lively debate over new laws allowing the creation of human-animal embryos (胚胎) for experiments. On one side of the debate were religious groups, who claimed that such science interferes with nature. Opposing them were scientists who pointed out that such experiments were vital to research cures for diseases.
The experts will publish reports after the end of the study, in which they will give definitions (定義) for animal embryos with human genes or cells, look at safety and animal welfare issues, and consider the right legal framework to work within.
1. What does the underlined word “they” in Paragraph 2 refer to?
A. Scientists in Britain and around the world. B. Leaders of the research.
C. Guidelines for scientists. D. Scientific experiments.
2. Scientists do research of mixing human genes into animals in order to ____.
A. test new drugs on animals B. to find ways to fight human diseases
C. prove the research is morally acceptable
D. create monkeys and mice with livers made from human cells
3. We can infer from the passage that ____.
A. the experts will release reports after the study
B. scientists have never doubted the use of animals with human materials
C. the creation of human-animal embryos for experiments is legal in Britain
D. religious groups hold that cures for diseases have to be done through experiments
4. What would be the best title of the passage?
A. Morally right or not? B. A debate about new laws
C. Cures for diseases D. Animal embryos with human genes
5. Where is the passage from?
A. A science textbook B. A science booklet
C. the science column of a newspaper D. A science magazine for teenagers
查看答案和解析>>
科目：高中英語 來源：廣東省普寧市20092010學(xué)年高一上學(xué)期必修三水平測試試卷（英語） 題型：語法填空
第二節(jié)： 語法填空：（共10小題；每小題1.5分，滿分15分）
仔細閱讀下面的短文，短文中有10個空格。請按照每小題括號內(nèi)的具體要求完成語法填空和詞形變化。
Among all the fast growing science and technology, the research of human genes, __31_ biological engineering as people call it, is drawing more and more attention now. Sometimes it is a hot topic __32__ (discuss) by people.
The greatest thing that gene technology can do is to cure serious diseases that doctors at present can almost do nothing with, such as cancer and heart disease. Every year, millions of people are murdered by these two __33__ (kill). And to date, doctors have not found __34_ effective way to cure them. But if the gene technology __35__ (apply) , not only these two diseases can be cured completely, __36__ (bring) happiness and more living days to the patients, but also the great amount of money people spent on curing their diseases can be saved, so __37__ benefits the economy as well. In addition, human life span(壽命) can be prolonged.
Gene technology can help people to give birth to more healthy and clever children. Some families, with the English imperial(皇室) family being a good example, have hereditary diseases. This means their children will for sure have the family disease, __38__ is a great trouble for these families. In the past, doctors could do nothing about hereditary diseases, __39__ gene technology can solve this problem __40__ (perfect). The scientist just needs to find the wrong gene and correct it, and a healthy child will be born.
查看答案和解析>>
科目：高中英語 來源：四川省2010屆高三第一次模擬考試試題（英語） 題型：閱讀理解
第二部分 閱讀理解（共25小題，第一節(jié)每小題2分，第二節(jié)每小題1分；滿分45分）
第一節(jié)，閱讀下面短文，從每題所給的四個選項（A、B、C和D）中，選出最佳選項，并在答題卡上將該項涂黑。
Bollworms are a traditional threat to cotton crops．Young ones feed on the boll，the part of the cotton plant that contains the seeds．
A bacterium known as Bt is able to kill bollworms and some other pests．Bt is the short form for Bacillus thuringiensis．It was discovered in the early twentieth century．Farmers began using Bt as a natural pesticide(殺蟲劑)．
Then，in the 1990s，researchers found a way to grow cotton plants that contain a Bt gene．The genetically improved cotton plant produces liquid that kills bollworms．Farmers around the world are now growing an estimated fourteen million hectares of Bt cotton．
Cotton bollworms also attack other crops．But scientists in China recently reported that Bt cotton may help prevent bollworm in other crops growing nearby．
The study involved crops grown in six provinces of northern China between 1992 and 2008．The study area contained three million hectares of cotton and twenty-two million hectares of corn，peanuts，soybeans and vegetables．
The researchers say the study suggested that Bt cotton not only controls bollworm on the transgenic cotton，but also may reduce its existence on other crops．And that reduction，they say，may decrease the need for insecticide use in general．
But the researchers also pointed out concerns．They say bollworms could develop resistance to the cotton plants designed to resist them．And they noted that insects called mirids have become “key pests” of cotton in China．They said this is because of a decrease in pesticide use made possible by Bt cotton．
The researchers say they do not believe that Bt cotton alone can solve all insect problems．Instead，they say farmers in China should consider it just one part of pest management systems．
1．What is Bt in this passage?
A．It's a kind of hi-tech invention． B．It's a natural bacterium．
C．It's a kind of pest． D．It's a man-made pesticide．
2．Bt cotton has all the advantages EXCEPT that ________．
A．it resists bollworms
B．it does good to other crops growing around
C．it reduces the use of insecticide
D．it helps to develop new insects
3．The underlined word “ones” in the first paragraph refers to ________．
A．bollworms B．cotton crops C．cotton seeds D．pests
4．From the passage，we can infer ________．
A．farmers around the world are now growing a large area of Bt cotton
B．researchers are probably now searching for new ways to solve other cotton problems C．bollworms could not exist in Bt cotton any longer
D．Chinese scientists found the way to grow Bt cotton
查看答案和解析>>
湖北省互聯(lián)網(wǎng)違法和不良信息舉報平臺 | 網(wǎng)上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權(quán)舉報專區(qū)
違法和不良信息舉報電話：027-86699610 舉報郵箱：58377363@163.com
