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（传播）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.

According to the passage, a good mixed diet ________.

A. is suitable for losing weight           B. should be only fruits and vegetables

C. normally contains enough vitamins     D. is often difficult to arrange

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.

What can be the best title of the passage?

A. A Good Mixed Diet　　　　　　     B. New Discovery

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

　　Zinc(锌) is one of about 20 elements necessary for good health. It is present in the body in a very small amount but makes it possible for important chemical actions to be carried out in cells. Scientists are just beginning to discover how zinc and other elements work.

　　Researchers first studied zinc as a way to speed recovery. Dr. Waltor Powys formerly with the United States Air Force noted that the laboratory animals recovered faster when some matters were added to their food. One of these matters was zinc. Dr. Powys later tested the zinc treatment on an American airman recovering from medical operations. The airman who received zinc sulphate(硫酸盐) recovered in half of the usual time. Other doctors studied persons who had a number of strange disorders. The doctors learned that all of these problems were caused by lack of zinc in the body. They treated these disorders successfully by giving the patients zinc sulphate.

　　The amount of zinc in the body can be found by examining blood and hair. A lack of this important element is not uncommon among people in both industrial and developing countries. Zinc is found in most high protein(蛋白质) foods such as meat, milk, fish and eggs. It is also found in whole grains. But many people do not eat enough of these food. Food markets should add these elements so that more people could get needed amount of these necessary matters.

1. Which of the following statements is true?

　　A. Scientists found how zinc works a long time ago.

　　B. People need a large amount of zinc to be healthy.

　　C. Zinc allows important chemical actions to take place in cells.

　　D. Zinc must be used in the course of medical operation.

2. One of the results from the study of zinc is that _______.

　　A. there’s only a little zinc in the human body

　　B. food rich in protein contains more zinc

　　C. some physical problems are caused by lack of zinc

　　D. any patient who receives zinc sulphate gets well immediately

3. The best title for the passage may be _______.

     A. A New Discovery                               B. Zinc and Health

     C. How Zinc Works                               D. Add Zinc to Your Food

Half of all bosses say a lack of sleep makes them irritable (易怒的) and prone to(有……倾向的) shout at their staff, a study said.

One in five managers also said being kept awake at night meant they were more likely to make mistakes, the Mori poll of 1,006 people revealed(显示).

Some 48% of people aged 35 to 44 said they did not get enough sleep compared to a national average 39%.

Among that age group, people with young children and managerial (管理的) jobs were most likely to suffer. 

The report, commissioned (委托) by the think tank De??mos and Ikea, said the issue of sleep had been forgotten in the work / life balance debate.

Report author Charles Leadbeater said, "On any working day, a quarter of all managers in Britain are likely to be in a bad mood because they have not slept well. "

"These sleep-deprived and shouty managers with a tend??ency to make mistakes are responsible for millions of British workers. It’s hardly a recipe for good management. "

And Mr. Leadbeater called on the government and em??ployers to take action.

A small loss of sleep is likely to have a big impact on people who lead stressful lives.

"Stressed out parents are already not sleeping enough. They are the people most likely to have their sleep disrupted and they are least able to recover."  

Apart from children keeping their parents awake, worrying about work is the biggest cause of wakefulness at night among managers.

Women are five times more likely than men to lose sleep because their partners snore (打呼噜).

The report predicted that there was likely to be a growing market of　sleep-deprived people, with an increase in "public napping".

Opportunities to take a nap at work are also likely to in??crease, and the report recommended that employers take their responsibility for ensuring employees were well slept more se??riously.

Peter Jelkeby, marketing manager at Ikea, said the re??search confirmed suspicions Britons were not getting enough sleep.  

And he added: "This is having a detrimental effect on our society as a whole. "

9. Which of following is true according to the text?

A. Half of the people say a lack of sleep makes them irrita??ble.

B. 20% managers said being kept awake at night meant they were more likely to make mistakes.

C. Some 48% of people said they did not get enough sleep.

D. People with young children and managerial jobs were most likely to suffer.

10. What does the underlined word "detrimental" mean?

A 良好的.          B.有害的           C.片面的     D.致命的

11. Who that suffered sleep disrupted are least able to recover?

A. The bosses.                 B. Managers.

C. People aged 35 to 44.               D. Stressed out parents.

12. Apart from children keeping: their parents awake, ________is the biggest cause of wakefulness at night among managers.

A. worrying about work            B. their partners’ snoring

C. the relationship                        D. working conditions

I don’t want to talk about being a woman scientist again. There was a time in my life when people asked constantly for stories about what it’s like to work in a field dominated (controlled) by men. I was never very good at telling those stories because truthfully I never found them interesting. What I do find interesting is the origin of the universe, the shape of space, time and the nature of black holes.
At 19, when I began studying astrophysics(天体物理学), it did not bother me in the least to be the only woman in the classroom. But while earning my Ph.D. at MIT and then as a post-doctor doing space research, the issue started to bother me. My every achievement—jobs, research papers, awards—was viewed through the lens (镜片) of gender (性别) politics. So were my failures. Sometimes, when I was pushed into an argument on left brain versus (相对于) right brain, or nature versus nurture (培育), I would instantly fight fiercely on my behalf and all womankind.
Then one day a few years ago, out of my mouth came a sentence that would eventually become my reply to any and all provocations (挑衅) : I don’t talk about that anymore. It took me 10 years to get back the confidence I had at 19 and to realize that I didn’t want to deal with gender issues. Why should curing sexism be yet another terrible burden on every female scientist? After all, I don’t study sociology or political theory.
Today I research and teach at Barnard, a women’s college in New York City. Recently, someone asked me how many of the 45 students in my class were women. You cannot imagine my satisfaction at being able to answer, 45. I know some of my students worry how they will manage their scientific research and a desire for children. And I don’t dismiss those concerns. Still, I don’t tell them “war” stories. Instead, I have given them this: the visual of their physics professor heavily pregnant doing physics experiments. And in turn they have given me the image of 45 women driven by a love of science. And that’s a sight worth talking about.
【小题1】Why doesn’t the author want to talk about being a woman scientist again?

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（传播）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.According to the passage, a good mixed diet ________.

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

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