30. The main purpose of the passage is __________
A. to introduce community service in Beijing.
B. to report home medical service available in Beijing.
C. to provide some efficient treatments for diseases in community.
D. to describe a special medical team in Beijing.
【答案】B
【解析】作者意图题。根据短文的大意可知报道了北京的家庭医学服务,故选B。
D
The most widespread fallacy(谬论)of all is that colds are caused by cold. They are not. They are caused by viruses passing on from person to person. You catch a cold by coming into contact, directly or indirectly, with someone who already has one. If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever. But they do not. And in isolated arctic regions explorers have reported people are free from colds until they come into contact again with infected people from the outside world by way of packages and mails dropped from airplanes.
During the First World War soldiers who spent long periods in the trenches(战壕), cold and wet, showed no increased tendency to catch colds.
In the Second World War prisoners at the Auschwitz concentration camp, naked and starving, were astonished to find that they seldom had colds. At the Common Cold Research Unit in England, volunteers took part in experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths, they put on bathing suits, allowed themselves to be with cold water, and then stood about dripping wet in a drafty(通风良好的)room. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.
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