题目内容

Vitamin B and C help to        your resistance. 
[      ]
A. set up      
B. give up      
C. build up    
D. stand up
C
练习册系列答案
相关题目

Joseph Goldberger was a doctor for the Unite States Public Health Service. In 1912, he began to study a disease that was killing thousands of people in the South. The disease was pellagra(烟酸缺乏病).
Doctor Goldberger traveled to the state of Mississippi where many people had pellagra. He studied the patients and their families. Most of the people were poor. The doctor came to believe that the disease was not passed from one person to another, but instead had something to do with food.
He received agreement from state officials to test this idea at a prison(监狱). Prisoners were offered pardons if they took part. One group of prisoners received their usual food, mostly corn. A second group ate meat, fresh vegetables and milk. Members of the first group developed pellagra. The second group did not.
But some experts refused to accept that poor food caused pellagra. They thought there were other causes.
So Doctor Goldberger put blood(血液) from a person with pellagra into his own body. He even took pills that had blood from pellagra patients. An assistant also took part in the experiments. So did Doctor Goldberger’s wife. None of them got sick. Later, the doctor discovered that a bit of dried brewer’s yeast(酿酒的酵母) each day could prevent pellagra.
Joseph Goldberger died of cancer in 1929. He was 55 years old. Several years later, researchers discovered the true cause of pellagra: having little of the vitamin B.
【小题1】 How old was Doctor Goldberger when he began to study pellagra?

A．22.B．30.C．38.D．55.
【小题2】The underlined part “this idea” (in Paragraph 3) refers to          .
A．the guessing that pellagra had something to do with food
B．a kind of yeast that prevented pellagra
C．pellagra that was easily passed from one person to another
D．a poor food that caused pellagra
【小题3】 Which is the right order about what Doctor Goldberger did?
a. He did a test on prisoners at a prison.
b. He did the experiments on himself.
c. He came to Mississippi to study the patients and their families.
d. He found poor food was easy to cause pellagra.
e. He discovered a little dried brewer’s yeast every day could prevent pellagra.
A．a, d, c, e, bB．c, a, d, b, eC．b, e, c, a, dD．c, b, e, a, d
【小题4】 This passage mainly tells us          .
A．Doctor Goldberger’s life
B．something about pellagra
C．Doctor Goldberger’s work experience
D．Doctor Goldberger’s study on pellagra

The vitamins (维生素) are named by letters of the alphabet (字母表). Vitamin A is needed by the eyes. There is Vitamin A in milk, butter, and green vegetables. It can be kept by the body.
Vitamin B cannot be kept. It must be supplied all the time by some of the food we eat.
Vitamin C is very important to the body. Without it men’s teeth become loose (松的) and their arms and legs get weak. Lemons (柠檬), oranges and tomatoes have Vitamin C in them.
Vitamin D is the sun vitamin. We get it in milk and eggs and from sunlight on our skin (皮). There are other Vitamins, but these A, B, C and D, are the most important.
【小题1】There are many kinds of vitamins, the most important of which are ______.

A．Vitamin AB．Vitamin B and C
C．Vitamin D and AD．Vitamin A ,B,Cand D
【小题2】There are both Vitamins A and D in ______.
A．green vegetableB．sunlightC．butter and eggsD．milk
【小题3】If somebody is near-eye sighted probably he needs ______. 
A．Vitamin AB．Vitamins A and CC．Vitamin DD．Vitamin B
【小题4】We can get Vitamin D when ______.
A．we have bread and butter for our breakfastB．we are eating fruits
C．we are working in the field in the sunD．we are having eggs

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（补品），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.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

2.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

3.For people who lack Vitamin B-twelve, they can eat more from _______.

A. sweet potatoes   B. pork products   C. green leafy vegetables  D. eggs

42. What would be the best title of the passage?

A. Getting enough vitamins through a balanced diet.

B. Vitamin supplements do harm to our health.

C. Vitamins are important to our health.

D. Lacking vitamins can cause many diseases.

 

The vitamins necessary for a healthy body are normally supplied by a good mixed diet, including a variety of fruits and green vegetables. It is only when people try to live on a very restricted diet, say that when trying to lose weight, that it is necessary to make special provisions to supply the missing vitamins.

    An example of the dangers of a restricted diet may be seen in the disease known as "beri-beri", which used to make large numbers of Eastern people who lived mainly on rice suffer. In the early years of last century, a Dutch scientist named Eijkman was trying to discover the cause of beri-beri. At first he thought it was transmitted by a germ (病菌) . He was working in a Japanese hospital, where the patients were fed on polished rice which had had the outer coverings removed from the grain, it was thought this would be easier for weak and sick people to digest.

    Eijkman thought his germ theory was proved when he noticed the chickens in the hospital yard, which were fed on remains from the patients' plates, were also showing signs of the disease. He then tried to separate the germ, which he thought was causing the disease, but his experiments were interrupted by a hospital official, who ordered that the rice without coverings, even though left over by the patients, was too good for chickens. It should be recooked for the patients, and the chickens should be fed on cheap, rough rice with the outer coverings still on the grain.

    Eijkman noticed that the chickens began to recover on the new diet. He began to consider the possibility that eating unmilled rice (糙米) somehow prevented or cured beri-beri--even that a lack of some ingredient (成分) in the coverings may be the cause of the disease. Indeed this was the case. The element needed to prevent beri-beri was shortly afterwards separated from rice coverings and is now known as vitamin B. The milled rice, though more expensive, was in fact causing the disease the hospital was trying to cure. Nowadays, this terrible disease is much less common thanks to our knowledge of vitamins.

1.What does the underlined word restricted mean?

   A. balanced        B. limited        C. diverse        D. complex

2.What do we know about the disease beri-beri?

  A. It killed large numbers of people.

  B. It resulted from lack of vitamins.

  C. It was transmitted by milled rice.

  D. It was caused by diseased chickens.

3.The ingredient missing from milled rice          .

  A. was vitamin B                   B. did not affect the chickens

  C. did not result in beri-beri           D. was named the Eijkman vitamin

4.What can be the best title of the passage?

   A. A Good Mixed Diet                  B. The New Discovery of Eijkman

   C. The Dangers of Beri-beri              D. The Importance of Vitamins

 

Joseph Goldberger was a doctor for the Unite States Public Health Service. In 1912, he began to study a disease that was killing thousands of people in the South. The disease was pellagra(烟酸缺乏病).

Doctor Goldberger traveled to the state of Mississippi where many people had pellagra. He studied the patients and their families. Most of the people were poor. The doctor came to believe that the disease was not passed from one person to another, but instead had something to do with food.

He received agreement from state officials to test this idea at a prison(监狱). Prisoners were offered pardons if they took part. One group of prisoners received their usual food, mostly corn. A second group ate meat, fresh vegetables and milk. Members of the first group developed pellagra. The second group did not.

But some experts refused to accept that poor food caused pellagra. They thought there were other causes.

So Doctor Goldberger put blood(血液) from a person with pellagra into his own body. He even took pills that had blood from pellagra patients. An assistant also took part in the experiments. So did Doctor Goldberger’s wife. None of them got sick. Later, the doctor discovered that a bit of dried brewer’s yeast(酿酒的酵母) each day could prevent pellagra.

Joseph Goldberger died of cancer in 1929. He was 55 years old. Several years later, researchers discovered the true cause of pellagra: having little of the vitamin B.

1. How old was Doctor Goldberger when he began to study pellagra?

A. 22.           B. 30.        C. 38.         D. 55.

2.The underlined part “this idea” (in Paragraph 3) refers to          .

A. the guessing that pellagra had something to do with food

B. a kind of yeast that prevented pellagra

C. pellagra that was easily passed from one person to another

D. a poor food that caused pellagra

3. Which is the right order about what Doctor Goldberger did?

a. He did a test on prisoners at a prison.

b. He did the experiments on himself.

c. He came to Mississippi to study the patients and their families.

d. He found poor food was easy to cause pellagra.

e. He discovered a little dried brewer’s yeast every day could prevent pellagra.

A. a, d, c, e, b          B. c, a, d, b, e        C. b, e, c, a, d        D. c, b, e, a, d

4. This passage mainly tells us          .

A. Doctor Goldberger’s life

B. something about pellagra

C. Doctor Goldberger’s work experience

D. Doctor Goldberger’s study on pellagra

 

违法和不良信息举报电话：027-86699610 举报邮箱：58377363@163.com

精英家教网