閱讀理解
     Now, we know that if we do not get enough vitamins, we are at risk of developing a number of
diseases. As a result, vitamin supplements(補品),though expensive, are popular with people who
worry that they are not getting enough vitamins from the foods they eat. But contrary to what many
people think, medical experts have found little evidence that most supplements do anything to improve
health or protect against disease.
     In fact, medical experts warn that taking too many of some vitamins can be harmful. For example,
too much vitamin E can cause bleeding. People should discuss what vitamins they take with their doctors,
as some vitamins can produce harmful side effects when mixed with medicines.
     Experts, however, do say that sometimes vitamins can help prevent disease. People who know they
lack a particular vitamin should take vitamin supplements. Some older adults, for example, may not have
enough vitamin B-twelve. This is because, as people get older, their body loses its ability to take it from
foods. Also, people who spend much time inside may need some extra vitamin D as the skin makes this
vitamin from sunlight.
     Different vitamins are found in different foods. Vitamin A is found in fish liver oil. It also is in the
yellow part of eggs. Sweet potatoes, carrots and other darkly colored fruits and vegetables contain
substances that the body can change into vitamin A. Vitamin B-twelve is found in green leafy vegetables
and other foods, like fruits. Vitamin K can be found in pork products.
     In fact, for most people, a balanced diet can ensure enough of the vitamins our bodies need. So, it is
important for us to eat a mixture of foods every day to ensure that we get enough vitamins our bodies
need.

1. What is probably talked about before this passage?
A. How many vitamins a person's body needs.  
B. How many vitamins some foods contain.
C. The benefits that vitamins bring to our health.
D. What people should do to stay healthy.

2. Vitamin supplements are popular with people because ________.  
A. people mistakenly think that they are good for their health
B. they contain more vitamins than the foods people eat
C. food does not provide enough vitamins people need
D. people fear that a lack of vitamins will lead to disease

3. From the passage, we can learn that medical experts advise people _________.
A. never to take any vitamin supplements  
B. to depend only on food for their vitamins
C. not to take any vitamins together with medicines
D. to consult doctors before taking vitamin supplements

4. For people who lack Vitamin B-twelve, they can eat more from _______.
A. sweet potatoes  
B. green leafy vegetables  
C. pork products  
D. eggs
練習(xí)冊系列答案
相關(guān)習(xí)題

科目:高中英語 來源: 題型:閱讀理解

閱讀理解(共14小題;每小題2分,滿分28分)

閱讀下列短文,從每題所給的(A、B、C和D)四個選項中,選出最佳選項,并在答題卡上將該選項標號涂黑。

A

I was in a terrible mood. Two of my friends had gone to the movies the night before and hadn’t invited me. I was in my room thinking of ways to make them sorry when my father came in. “Want to go for a ride, today, Beck? It’s a beautiful day.” ks5*u

“No! Leave me alone!” Those were the last words I said to him that morning.

    My friends called and invited me to go to the mall with them a few hours later. I forgot to be mad at them and when I came home to find a note on the table. My mother put it where I would be sure to see it. “Dad has had an accident. Please meet us at Highland Park Hospital”.

    When I reached the hospital, my mother came out and told me my father’s injuries were extensive. “Your father told the driver to leave him alone and just call 911, thank God! If he had moved Daddy, there’s no telling what might have happened. A broken rib(肋骨)might have pierced(穿透)a lung...”

My mother may have said more, but I didn’t hear. I didn’t hear anything except those terrible words: Leave me alone. My dad said them to save himself from being hurt more. How much had I hurt him when I hurled those words at him earlier in the day?

    It was several days later that he was finally able to have a conversation. I held his hand gently, afraid of hurting him.

    “Daddy… I am so sorry…”

“It’s okay, sweetheart. I’ll be okay. ”

    “No,” I said, “I mean about what I said to you that day. You know, that morning?”

    My father could no more tell a lie than he could fly. He looked at me and said. “Sweetheart, I don’t remember anything about that day, not before, during or after the accident. I remember kissing you goodnight the night before, though. ”He managed a weak smile.

    My English teacher once told me that words have immeasurable power. They can hurt or they can heal. And we all have the power to choose our words. I intend to do that very carefully from now on.

The author was in bad mood that morning because _______.

    A. his father had a terrible accident

    B. he couldn’t drive to the mall with his friends

    C. his friends hadn’t invited him to the cinema

    D. his father didn’t allow him to go out with his friends

Why did the author say sorry to his father in the hospital?

    A. Because he didn’t go along with his father.

    B. Because he was rude to his father that morning.

    C. Because he failed to come earlier after the accident.

    D. Because he couldn’t look after his father in the hospital.

The reason why the author’s father said he forgot everything about that day is that _______.

    A. he had a poor memory B. he didn’t hear what his son said

    C. he just wanted to comfort his son    D. he lost his memory after the accident

What lesson did Beck learn from the matter?

    A. Don’t treat your parents badly.

    B. Don’t hurt others with rude words.

    C. Don’t move the injured in an accident.

    D. Don’t be angry with friends at small things.

查看答案和解析>>

科目:高中英語 來源: 題型:閱讀理解

第三部分  閱讀理解(共20小題;每小題2分,滿分40分)

閱讀下列短文,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。?

More and more people are choosing to take their holidays in the UK rather than travel abroad.

In the late 1970s, air travel became affordable for the average family in the UK, and more and more British people started traveling abroad for their summer holidays. After all, the British weather wasn't very good, even in summer, so a lot of British people left the UK for a vacation. Particularly popular with families on a budget was the "package holiday", where the cost of flights and hotels were offered as one discounted price by travel agents.

In the 1980s and 1990s, young people in the UK became wealthier on average, or at least had more money left after they spent on the living cost. As a result, they started to go abroad in groups, to places such as Spain and Greece.

British holidaying habits have begun to change, however. Climate change means that the UK now has a hotter climate than before, so people do not need to go abroad to find good weather. Also, the credit problem has affected the international value of the British pound, so going abroad is more expensive than it used to be. As a result, more and more British people are choosing to spend their summer holidays in the UK.

This year, British hotels in areas such as the English Lake District have seen a 40 percent increase in booking compared with last year. That rise is mainly owing to the British staying in their own country for their holidays. In addition, however, foreign tourists are now finding the UK cheaper to visit than previously.

In the UK, the national tourism industry — when people go on holiday in their own country — is healthier than it has been in decades. The UK has always been famous for its international explorers. It is only just starting to discover itself, however.?

1. The underlined phrase "package holiday" in Paragraph 2 means a holiday________.

   A. offered by hotels                        B. with a package

   C. including flights                        D. with less expense

2. We can infer from the passage that________.

   A. the value of British pound has become a huge problem

   B. young people in the UK spend more than their parents

   C. British people think of a hot summer as good weather

   D. many Greek people leave for the UK for their business

3. Why do some British hotels have an increase in booking this year?

   A. Because many people have seen the Lake District.

   B. Because hotels in the Lake District are very cheap.

   C. Because more British spend their holiday home.

   D. Because foreign tourists have found these hotels.

4. What's the writer's attitude towards the British tourism industry?

   A. Optimistic.       B. Negative.         C. Doubtful.         D. Noble.

查看答案和解析>>

科目:高中英語 來源:天津四中2010屆高三下學(xué)期模擬考試英語試卷 題型:閱讀理解

 

第三部分  閱讀理解(共20小題:每小題2.5分,滿分50分)

閱讀下列短文,從每題所給的四個選項A、B、C、D四個選項中,選出最佳選項。

Today, as in every other day of the year, more than 3000 U.S. adolescents will smoke their first cigarette on their way to becoming regular smokers as adults. During their lifetime, it can be expected that of these 3000 about 23 will be murdered, 30 will die in traffic accidents, and nearly 750 will be killed by a smoking-related disease. The number of deaths attributed to cigarette smoking outweighs all other factors, whether voluntary or involuntary, as a cause of death.

Since the late 1970s, when daily smoking among high school seniors reached 30 percent, smoking rates among youth have declined. While the decline is impressive, several important issues must be raised.

First, in the past several years, smoking rates among youth have declined very little. Second, in the late 1970s, smoking among male high school seniors exceeded that among female by nearly 10 percent. The statistic is reversing. Third, several recent studies have indicated high school dropouts have excessively high smoking rates, as much as 75 percent.

Finally, though significant declines in adolescent smoking have occurred in the past decade, no definite reasons for the decline exist. Within this context, the National Cancer Institute (NCI) began its current effort to determine the most effective measures to reduce smoking levels among youth.

36. According to the author, the deaths among youth are mainly caused by __________.

A. traffic accidents                                   B. smoking-related disease

C. murder                                                 D. all of these

37. Every day there are over ______ high school students who will become regular smokers.

A. 750                         B. 23                    C. 30                    D. 3000

38. By “dropout” the author means __________.

A. students who failed the examination        B. students who left school

C. students who lost their way                    D. students who were driven out of school

39. The reason for declining adolescent smoking is that __________.

A. NCI has taken effective measures           

B. smoking is prevented among high school seniors

C. there are many smokers who have died of cancer          

D. none of these

40. What is implied but not stated by the author is that __________.

A. smoking rates among youth have declined very little     

B. there are now more female than male smokers among high school seniors

C. high smoking rates are due to the increase in wealth

D. smoking at high school is from low socio-economic backgrounds

 

查看答案和解析>>

科目:高中英語 來源:同步題 題型:閱讀理解

閱讀理解
      Now and again I have had horrible dreams, but not enough of them to make me lose my delight in
dreams. To begin with. I like the idea of dreaming, of going to bed and lying still and then, by some
queer magic, wandering into another kind of existence. As a child, I could never understand why
grown-ups took dreaming so calmly when they could make such a fuss about any holiday, This still
puzzles me. I am puzzled by people who say they never dream and appear to have no interest in the
subject. It is much more astonishing than it would be if they said they never went out for a walk. Most
people do not seem to accept dreaming as part of their lives. They appear to see it as an irritating little
habit, like sneezing or yawning I can never understand this. My dream life does not seem as important
as my waking life because there is far less of it, but to me it is important.

1. What is the author's attitude toward dreaming?

A. He thinks it puzzling            
B. He likes it                     
C. He is interested in it              
D. He doesn't accept it as part of his life

2. For the author of the passage, dreaming is________.    .

A. another kind of existence          
B. an irritating little habit            
C. a horrible but wonderful experience 
D. a true reflection of reality      
    
3. The author of the passage suggests that people who say they never go out for a walk are_____.

A. interesting    
B. unbelievable    
C. mysterious(難以理解的)      
D. lazy

4. The author of the passage enjoys dreaming most______.    .

A. only when he was a child          
B. only when he is a grown-up
C. both as a child and as a grown-up    
D. only in his old age

5. Why does the author of the passage complain? 

A. Because most people are overexcited about their dreams 
B. Because most people are not interested in talking about their dreams
C. Because most people have had dreams most of the time
D. Because most people consider their dreams of to much importance

查看答案和解析>>

同步練習(xí)冊答案