The beet (甜菜) is a tasty root vegetable that does not require much work to grow. People think of beets as being always dark red，but they can also be pink，yellow or white. Beets are high in nutrients，and both the root and the tops can be eaten. The leaves make good salads when the plants are young，and the greens can be cooked when the plants are older. Beets grow best in full sun and in loose soil that is not too wet.
Remove stones from the soil while preparing the ground，and test it before adding fertilizer Beet seeds can be planted as soon as the soil can be worked at the start of the growing season. Planting them every two or three weeks will provide a continuous harvest into the fall. A beet seed is a fruit containing several seeds. Overcrowding the plants will mean that the roots cannot spread out and grow，so thin the beets by removing the smaller ones and using them as greens.
A specialist named Cindy Haynes says little or no fertilizer is needed in rich soils. Once the seeds are planted，however，she suggests covering the soil to protect it from the rain and during dry periods. She also suggests putting a fence around the plants to keep away rabbits and deer. She says the only work beets need once they have been thinned is weeding and， when the weather is dry，a weekly watering. For best results，beets should be picked when the roots are two and one-half centimeters around. Larger beets can be tough，and have to be cooked for a long time. Beets can be eaten in many ways.
60.What is the second paragraph mainly about?
A. How to test the soil.           B. How to plant beets
C. When to harvest beets.          D. When to plant beets.
61.Smaller beets are often removed in order to       .
A. give other beets space to grow    B. add more fertilizer to the soil
C. plant new seeds                D. use the green，young leaves in salads
62.What may the next part of the last paragraph be about?
A. When to pick beets.             B. How to eat beets.
C. The uses of beets.              D. The taste of larger beets.
63.The passage is most probably from a(n)     .
A. gardening book   B. education magazine   C. science report   D. entertainment magazine
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：閱讀理解


For all the dinner table, a glass of milk seems to be a constant , at least it was when I was growing up．It was widely believed that milk was integral in building strong bones and teeth. There’s no doubt that dairy products(乳制品), and milk in particular, are high in protein and calcium, and most milk products are supplemented with Vitamin D and A．
While it’s well known that our bones need calcium, some studies suggest that high calcium intake doesn’t necessarily lower a person’s risk for fractures（骨折）． A Harvard study found that people who drank two or more glasses of milk had no greater protection from breaking a bone than those who drank a glass or less a week．
There’s no doubt that we need calcium, Some anti-dairy supporters claim that dairy can lead to heart disease． Much of this claim is based on high fat and high dairy products, like cheeses and creams, which may indeed contribute to cardiovascular problems． Some studies have linked high milk intakes with a risk of prostate cancer; this seems to be caused by high-fat dairy products, not dairy in general．
Although milk was always regarded as one of the most important thing we need for our bones, yet least promoted, factors involved in strengthening bones. Perhaps we should think of dairy as less like a nutrient and more like a food. If you like it, eat it．If not, find some others． Because some claims may not be completely true, when I eat a cream, I’m not thinking about calcium, protein, or any such thing. I’m thinking delicious．
61．Which of the following is TRUE on the milk?
A．The more milk you drink, the more risk for fractures you might be．
B．The more milk you drink, the less risk for fractures you might be．
C．The less milk you drink, the less risk for fractures you might be．
D．There is no link between them．
62．Some anti-dairy supporters claim that dairy can lead to except______．
A．cardiovascular problems                     B．heart disease
C．prostate cancer                             D．stomach cancer
63．The underlined words “some others” in the last paragraph refer to_____．
A．dairy products               B．milk               C．food               D．cream
64．What’s the author’s attitude towards milk?
A．He doesn’t like milk any more
B．He used to drink milk as a child．
C．He regards milk as a nutrient．
D．He always cares about calcium, protein when he eats something．
65．We can learn from the text that_____
A．All the claims are not completely true ．
B．High milk intakes can lead to cancer．
C．It’s necessary for you to reduce milk intakes．
D．Give up milk for your health．

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

There are new findings that not enough sleep may cause people to gain weight.Researchers say a lack of sleep can produce hormonal changes that increase feelings of hunger.
In one study,researchers in the United States examined information on more than 1000 people.The people had taken part in a long-term study of sleep disorders.
Some people slept less than five hours a night.They had 15 percent higher blood levels of a hormone called ghrelin than people who slept eight hours.And they had 15 percent less of the hormone leptin.Experts say ghrelin helps make people feel hungry;leptin makes you feel full.
The scientists say these hormonal changes may be a cause of obesity in Western societies.They note the combination that limitation is common and is widely available.
The results were not affected by how much people exercised.People who are awake longer have more time to burn energy.But the researchers say loss of sleep may increase hunger especially  for high-calorie foods,so people gain weight.It seems that,for survival,the body may be designed to store more fat during times with less sleep.
Researchers from Stanford University in California and the University of Wisconsin did the study.They found that the best amount of sleep for weight control is 7.7 hours a night.
The Public Library of Science published the findings in its journal Medicine.Internet users can read the full study,free of charge,at plos.org.
小題1:Which of the following shows the right way in which lack of sleep causes weight gain?
A．more ghrelin and less leptin→feeling hungry→eating more
B．feeling hungry→eating more→more ghrelin and less leptin
C．burning more energy→feeling hungry→eating more
D．more leptin and less ghrelin→feeling full→less exercise
小題2:The two words missing in the 4th paragraph should be “_________”and “_________”.
A．weight;sleepB．sleep;foodC．hunger;foodD．weight;work
小題3:When you sleep 7.7 hours a night,you will_________.
A．have your ghrelin level rise and leptin level drop
B．have your leptin level rise and ghrelin level drop
C．have your ghrelin and leptin levels properly balanced
D．feel neither hungry nor full
小題4:The writer wrote this passage to_________.
A．make a news reportB．offer a piece of medical advice
C．make an advertisementD．keep a record of the research findings

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


A woman wears a face mask to protect her from polluted air in Lanzhou, China, in December．
A new study showed air pollution might put people more at risk for heart disease than scientists had thought．Kristin Miller, a doctoral student at the University of Washington, said chances of getting the disease were related to not only which city a woman lived in, but also where in the city．The study found that the effects of air pollution were often larger within cities than between cities．
The new findings make experts suspect that current pollution limits may be inadequate．Scientists examined rates of heart attack, stroke （中風(fēng)） and other cardiovascular （心臟血管的） events in women with long-term exposure to air pollution．
The study involved women over the age of fifty who had no sign of cardiovascular disease at the start of the research．The study followed the women for as long as nine years to see how they would develop cardiovascular problems．
The researchers also examined levels of fine particles （粒子，微粒） in the air in 36 areas across the country．That information came from the Environmental Protection Agency．The extremely small particles came from industrial smoke and traffic, along with things like wood-burning fireplaces in houses．
In the study, every ten-microgram increase in pollution was linked to a twenty-four percent increase in the risk of a cardiovascular event．But it was related to a seventy-six percent increase in the risk of death from cardiovascular disease．
But just how do particles in the air damage the cardiovascular system? The particles may cause the lungs to swell and release chemicals from the pollutants into the blood．The chemicals then could damage the heart．
1．The passage mainly talks about______．
A．the effects of pollution on women
B．how to protect women from air pollution
C．how air pollution damages a person’s heart
D．the relationship between air pollution and heart diseases
2．The case of the woman wearing a face mask shows ______．
A．people are paying more and more attention to their health
B．the woman is afraid of getting heart disease
C．Lanzhou city is more heavily polluted than other cities
D．a(chǎn)ir pollution is becoming more and more serious
3．We can learn from the passage that _______．
A．a(chǎn)ir pollution is more serious than scientists thought
B．the control of air pollution is effective in some cities
C．people throughout a city have the same risk of getting heart diseases
D．a(chǎn)ir pollution affects women more than men
4．The study implies that ______．
A．a(chǎn)ir pollution has a bigger effect on older women than younger women
B．small particles in the air mainly come from industrial smoke
C．the rise in air pollution may lead to a higher death rate from cardiovascular disease
D．a(chǎn)ir pollution has been affecting people for as long as nine years in the city of Lanzhou

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 makes one person more intelligent than another? What makes one person a genius, like the brilliant Albert Einstein, and another person a fool? Are people born intelligent or stupid, or is intelligence the result of where and how you live? These are very old questions and the answers to them are still not clear.
We know, however, that just being born with a good mind is not enough. In some ways, the mind is like a leg or an arm muscle. It needs exercise. Mental (done with the mind) exercise is particularly important for young children. Many child psychologists (心理學(xué)家) think that parents should play with their children more often and give them problems to think about. The children are then more likely to grow up bright and intelligent. If, on the other hand, children are left alone a great deal with nothing to do, they are more likely to become dull and unintelligent.
Parents should also be careful with what they say to young children. According to some psychologists, if parents are always telling a child that he or she is a fool or an idiot, then the child is more likely to keep doing silly and foolish things. So it is probably better for parents to say very positive (helpful) things to their children, such as “That was a very clever thing you did.” or “You are such a smart child.”
36. The words “intelligent” and “brilliant” in the first paragraph probably mean _______ while “dull” in the second paragraph means ________.
A. bright and splendid; slow in thinking and understanding
B. pretty and handsome; ordinary-looking
great and important; common
D. hopeful and helpful; careless
37. According to the context we can guess that a genius is ________ while an idiot is ________.
A. a normal person; a funny person
B. a strong person; a weak person
a highly intelligent person; a foolish or weak-minded person
D. a famous person; an ordinary person
38. A person ________ is more likely to become a genius.
A. whose parents are clever
B. often thinking about difficult problems
often helped by his parents and teachers
D. born with a good brain and putting it into active use
39. It is better for parents ________.
A. to praise and encourage their children more often
B. to be hard on their children
to leave their children alone with nothing to do
D. to give their children as much help as possible
40. Which of the following is NOT true according to the article?
A. Parents play an important part in their children’s growth.
B. The less you use your mind the duller you may become.
C. Intelligence is obviously the result of where and how you live.
D. What makes a person bright or stupid is still under discussion.

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


D
To what degree can a computer achieve intelligence (智力)? The answer to this question may lie in a newly-developed US computer program called Smarter Child and the Internet．
If you ran into Smarter Child online , you would be surprised at this kid’s huge memory．It can recite many facts． For example , Smarter Child knows every baseball player in every team this season．
He knows every word in the dictionary and the weather in every major city areas across the US．However , if you ask Smarter Child other questions , you get stranger answers．A question about Smarter Child’s age returns． “One year, 11 days, 16 hours, 7 minutes, and 47 seconds!” Asking where he lives gets , “In a clean room in a high-tech building in California．”
Smarter Child uses the vast information on the World Wide Web as his memory bank．To answer questions about spelling , for instance , Smarter Child goes to American Heritage Dictionary online．For the weather , he visits www．intellicast．com．
Some scientists believe that by joining the many systems of the Internet , an artificial being with the combined knowledge of , say , Albert Einstein, Richard Nixon and Britney Spears could be born．However if Smarter Child wants to think and learn on his own like the boy-computer David in the movie A．I．, Artificial Intelligence , he must overcome two problems．
The first is that computers find it difficult to read web pages because the files are labeled in different ways．That’s why programmers need to tell Smarter Child where to look for the weather．It would be a much more difficult task to let him find it himself．
Another problem is that while Smarter Child can process (處理) information more exactly and faster than any human , he lacks common sense—a basic grounding of knowledge that is obvious to any young child．
67．From the text we can infer that www．intellicast．com is a website___________．
A．which is specially designed to help Smarter Child
B．where we people can find Smarter Child
C．where weather forecasts are made
D．which is about artificial intelligence
68．It is probably most difficult for Smarter Child to_______．
A．tell us how to spell a difficult word
B．tell us how the American government is run
C．provide us with a famous poem by Shakespeare
D．learn how to tell right behaviors from wrong ones。
69．Which of the following is TRUE according to the text?
A．Smart Child has his own memory bank big enough for all kinds of information．
B．A．I．Artificial Intelligence is probably the name of a film about a boy-computer．
C．Smart Child can recognize different files and find information needed on his own．
D．We have similar product now which has the knowledge of Einstein , Nixon and Spears．
70．Which of the following is the best title for the passage?
A．A New Web Child      B．Smarter Child
C．The Future of Internet    D．Intelligence Development

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


D
If you want to live longer and lower the risk of heart disease, a move to the mountains may help． Research by scientists in Greece shows that living in the mountains is good for the heart and longevity． People living at higher altitude have lower possibility of dying from heart disease than those closer to sea level, even if they have factors that could increase their risk．"Residence in mountainous areas seems to have a 'protective effect' from heart disease," said Dr Nikos Baibas of the University of Athens．He and his colleagues suspect that the increased exercise from walking up mountainous area gives the heart a good workout and enables it to cope with lower levels of oxygen．
Researchers studied the health records and death rates of 1,150 Greeks who lived in three villages near Athens over 15 years．One village was 1,000 metres above sea level and the other two were in low-lying areas．Although men and women living in the mountainous village had higher blood pressure rates and other risk factors than people in the other villages, they had a lower rate of death from heart disease and other causes after a fifteen year follow-up．"The contrast was more evident among men than among women," Baibas added in a report in the Journal of Epidemiology and Community Health．Heart disease is one of the world's top killers．Smoking, high blood pressure, raised cholesterol levels, being overweight or obese and a family history of the illness increase the odds of developing the disease．
68．The first sentence in the passage is used to __________．
A．tell readers what the passage focuses on      
B．give a very good guessing
C．warn people of the risk of heart disease      
D．name a new unknown illness
69．According to the passage, a person _________ may have less possibility of having heart attack.
A．with more money                        B．with a better living habit
C．from higher altitude                     D．in a happier mood
70．How long does the research of the Greeks last?
A．At most 10 years．                          B．About 15 years．
C．More than 20 years．                      D．Not mentioned．
71．Apart from altitude, how many factors raise the chance of developing heart disease?
A．three                B．Four                  C．Five                 D．Six

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

The reasons for a person’s becoming an alcoholic have often been debated by psychologists and other scientists. But recent studies suggest that the problem of alcoholism(酒精中毒) should also be the focus of investigation by biologists.
While such things as hard jobs, boredom, and unhappiness can lead to alcoholism, researchers at a prominent university have found that there may also be a genetic factor involved in alcoholism. In the study, children of alcoholic parents were surveyed. The result showed that the children of alcoholic parents were more likely to become alcoholics themselves than were children of non-drinking parents.
This evidence in itself is not conclusive（令人確信的）about anything. After all, it may be the constant exposure（接觸）and easy access to alcohol that cause the children of alcoholics to become alcoholics themselves. But there is more evidence. The study found that children born of alcoholic parents but raised by non-drinking foster（撫養(yǎng)的）parents also were susceptible to alcoholism. This group of offspring（后代）was more likely to take up drinking than youngsters who were born of and raised by non-drinking parents.
Other evidence found in the study suggests that environment does not play as important a role in the development of alcoholism as had been previously thought. The study found that the likelihood of alcoholism was better predicted from the characteristics of the parents than from such environmental characteristics as type of job or level of income.
63. What is the main point of the passage?
A. To describe the environment in the development of alcoholism.                                
B. To study the psychological factor in the development of alcoholism.
C. To describe how the children of alcoholic parents become alcoholics themselves.        
D. To describe the close link between genetic make-up and alcoholism.
64. According to the passage, what can bring about alcoholism?
A. Biologists’ investigation.                       B. Non-drinking parents.
C. Hard jobs, boredom and unhappiness.             D. Foster parents’ raising.
65. According to the findings of the study, who would be the most likely to become an alcoholic?  
A. A person who had a hard job.
B. A person who was born of alcoholic parents.
C. A person who was raised by drinking foster parents.
D. A person who was born of and raised by non-drinking parents.
66. According to the passage, what should the problem of alcoholism be treated as?
A. A psychological problem.
B. An environmental problem.
C. A biological problem.
D. An educational problem.

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


B.
My secret for staying young is simple. Put all attention to the part of you---your brain and keep it young and growing. Keep your mind awake and you’ll stay young all over. These are exciting time. Take an interest in the world around you, and stick to(堅(jiān)持) learning at least one new thing every day.
No matter how old you are, it’s not too late to make your life more interesting. I know a housewife with no knowledge before who made herself into a famous industrial engineer(工業(yè)工程師).I know a retired(退休) electrical engineer who has became a highly-paid ceramin (陶器的) artist.
Get over the idea that you are ever too old to go back to school. I know a man who entered a medical college at 70.He got his degree with honor and became a doctor. Another man went to law school at 71 and now is an active lawyer(律師).Staying young is easy for those, old or young, who live in the future. You can do it if you care enough to try. Keep you mind awake and active: that’s the only elixir(萬(wàn)驗(yàn)靈丹)
41.The statement that brain to people of all ages, remains young and growing is_____.
A.impossible                               B.a scientific fact(科學(xué)事實(shí))
Ｃ.supposed(或許) to be true        D.a wrong conclusion( 錯(cuò)誤結(jié)論)
42.It is wrong to______.
think oneself too old to go back to school  B.keep one’s mind awake
try to stay young                      D.get one’s degree with honors
43.The passage tells that the man who entered college at 70 became_____.
A.an active lawyer                       B.an electrical engineer
C.a famous doctor                       D.a highly-paid ceramic artist
44.The only youth elixir is______.
to go back to school                     B.not to think about one’s age
to live in the future                  D.to keep one’s mind awake and active
45.According to the writer,you should_____learning at least one new thing every day.
A.take care of        B.start            C.begin          D.keep on

查看答案和解析>>

同步練習(xí)冊(cè)答案