職稱英語新增衛(wèi)生類文章
職稱英語新增衛(wèi)生類文章
全國專業(yè)技術(shù)人員職稱英語考試有其自身的特點 ,專業(yè)技術(shù)人員如果能夠在掌握一定詞匯的基礎(chǔ)上 ,加強英語閱讀能力的培養(yǎng) ,不僅能幫助廣大專業(yè)技術(shù)人員順利通過職稱英語考試 ,更有助于提高他們的整體英語水平。下面是學習啦小編帶來的職稱英語新增衛(wèi)生類文章，歡迎閱讀!
職稱英語新增衛(wèi)生類文章篇一
Tracking Down HIV
In the summer of 1980, a patient had a strange purplish spot removed from below his ear. It was Kaposi’s sarcoma, a rare form of skin cancer. This patient also had lymph node swelling and exhaustion. In November 1980, a Los Angeles immunologist examined a young man who had diseases linked to immune system malfunctions. The doctor had a T-cell count taken of the patient’s blood. T-cells are a type of white blood cell that plays a key role1 in immune responses. The patient had no helper T-cells.
By the end of 1980, 55 Americans were diagnosed with infections related to immune system breakdown; four had died. A year later the death toll was 74. Intravenous drug users had T-cell abnormalities. People who had received blood transfusions showed symptoms of immune system breakdown. By July 1982, 471 cases of the disease, now called Acquired Immune Deficiency Syndrome (AIDS), had been reported; 184 people had died.
In April 1984, American virologist Dr. Robert Gallo isolated the pathogen, or disease producer, responsible for2 AIDS. He called it HTLV-III. In Paris, Dr. Luc Montagnier identified a virus he called LAV. An international panel of scientists determined that both men had found the same virus. It became known as Human Immunodeficiency virus (HIV). Blood banks began screening for HTV in 1985, but by then about 29,000 people had been infected through blood transfusions. Some 12,000 hemophiliacs had contracted HIV through blood-clotting products. By 1995, 477,900 Americans had AIDS; 295,500 had died.
In 1996, researchers announced drugs that reduced HIV in infected people. Today scientists are testing vaccines and believe that if HIV can be suppressed, then perhaps it can be eradicated3, but it is still a race against time.
職稱英語新增衛(wèi)生類文章篇二
Common Questions about Dreams
Does everyone dream?
Yes. Research shows that we all dream. We have our most vivid dreams during a type of sleep called Rapid Eye Movement (REM) sleep. During REM sleep, the brain is very active. The eyes move quickly back and forth1 under the lids, and the large muscles of the body are relaxed. REM sleep occurs every 90-100 minutes, three to four times a night, and it lasts longer as the night goes on. 1 We dream at other times during the night, too, but those dreams are less vivid.
Do people remember their dreams?
A few people remember their dreams. However, most people forget nearly everything that happened during the night 一 dreams, thoughts, and the short periods of time when they were awake.
It seems that the memory of the dream is not totally lost，but for some reason it is very hard to bring it back. If you want to remember your dream, the best thing to do is to write it down as soon as you wake up.
Are dreams in color?
Most dreams are in color. However, people may not be aware of it for two reasons ： They don，t usually remember the details of their dreams, or they don，t notice the color because it is such a natural part of our lives. Do dreams have meaning?
Scientists continue to debate this issue.Some people use dreams to help them learn more about their feelings, thoughts, behavior, motives, and values. Others find that dreams can help them solve problems. It’s also true that artists, writers, and scientists often get creative ideas from dreams.
How can I learn to understand my dreams?
The most important thing to remember is that your dreams are personal. The people, actions, and situations in your dreams reflect your experience, your thoughts, and your feelings. Some dream experts believe that there are certain types of dreams that many people have, even if they come from different cultures or time periods. Usually, however, the same dream will have different meanings for different people. For example, an elephant in a dream may mean one thing to a zookeeper and something very different to a child whose favorite toy is a stuffed elephant. Then look for links between your dreams and what is happening in your daily life. If you think hard and you are patient, perhaps the meaning of your dreams will become clearer to you.
職稱英語新增衛(wèi)生類文章篇三
lee Cream Taster Has Sweet Job
John Harrison has what must be the most wanted job in the United States. He’s the official taster for Edy’s Grand Ice Cream, one of the nation’s best-selling brands. Harrison’s taste buds are insured for class="main">
職稱英語新增衛(wèi)生類文章
After I interviewed Harrison, I realized that the life of an ice cream taster isn’t all Cookies ’n Cream 一 a flavor that* he invented, by the way. No, it’s extremely hard work, which requires discipline and selflessness.
For one thing，he doesn’t swallow on the job. Like a coffee taster, Harrison spits. Using a gold spoon to avoid “off’ flavors, he takes a small bite and moves it around in his mouth to introduce it to all 9,000 or so taste buds. Then he breathes in gently to bring the aroma up through the back of his nose. Each step helps Harrison evaluate whether the ice cream has a good balance of dairy, sweetness, and added ingredients 一 the three-flavor components of ice cream. Then, even if the ice cream tastes heavenly, he puts it into a trash can. A full stomach makes it, impossible to judge the quality of the flavors.
During the workweek, Harrison told me that he has to make other sacrifices, too: no onions, garlic, or spicy food, and no caffeine. Caffeine will block the taste buds, he says, so his breakfast is a cup of herbal tea.
Harrison’s family has been in the ice cream business in one way or another1 for four generations, so Harrison has spent his entire life with it. However, he has never lost his love for its cold, creamy sweetness. On these occasions，he does swallow, and he eats about a quart (0.95 liters) each week. By comparison4, the average person in the United States eats 23.2 quarts (21. 96 liters) of ice cream and other frozen dairy products each year.
Edy's ice cream is available in dozens of flavors. So what flavor does the best-trained ice-cream taster in the country prefer? Vanilla! In fact, vanilla is the best-selling variety in the United States.
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