People’s attitude toward drugs has become to resemble an emotional roller coaster, careening wildly from dizzy heights of pharmacologic faith to gloomy terror over drug hazards. A host of dreaded killers that had tyrannized the world for centuries can now be cured. That is a cause for some to regard drugs as "miraculous". On the other hand, there are hundreds of pitifully deformed babies born of mothers who had taken thalidomide — the very thought of them causes terror.
What is the sensible attitude toward drugs
I think the first thing to think about is the differences between drugs and wonder drugs. The antibiotics, such as penicillin, can really cure certain bacterial diseases. On the other hand, the major diseases threatening Americans today are cancer, stroke, hypertension, coronary disease, arthritis and psychoses. Against them, the doctor’s bag of tricks is limited. He has no wonder drug.
Of course, many patients suffering
A. Rheumatoid arthritis,
B. Sniffle and sneeze.
C. Meningococcal meningitis.
D. Schizophrenia.
The World Health Organization says as many as 10 million persons worldwide may have the virus (病毒) that causes AIDS. Experts believe about 350 thousand persons have the disease. And one million more may get it in the next five years. In the United States, about 50,000 persons have died with AIDS. The country’s top medical official says more than 90 percent of all Americans who had the AIDS virus five years ago have been dead.
There is no cure for AIDS and no vaccine (疫苗) medicine to prevent it. however, researchers know much more about AIDS than they did just a few years ago. We now know that AIDS is caused by a virus. The virus invades healthy cells including white blood cells that are part of our defense system against disease. It takes control of the healthy cell’s genetic (遗传的)material and forces the cell to make a copy of the virus. The cell then dies. And the viral particles move on to invade and kill more healthy cells.
The AIDS virus is carried
A. it starts to destroy our white blood cells
B. we begin to feel tired
C. it means we will die very soon
D. our white blood cells can control it
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