2012淘金英语专业四级听写
上海外国语大学
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The most common health problem linked to hot weather is heat stress. The causes of heat stress include wearing heavy clothing, physical work or exercise, hot weather and high humidity. If several of these conditions are present at the same time, a person's body temperature may rise above safe levels. Most people suffer only muscle pain because of heat stress. The pain is a warning that the body is becoming too hot. Doctors say those suffering muscle pain should stop all activity and rest in a cool place. Doctors say not to return to physical activity for a few hours because serious conditions could develop. Some people face an increased danger from heat stress. They may have a weak or damaged heart, high blood pressure or other problems of the blood system. Severe heat is also dangerous for people who weigh too much and have too much body fat, and for people who drink alcohol.