就某人物品质表达个人观点（篇章3）-2023阅读表达题篇章精选+精析精讲（word+ppt)

阅读表达--就某个人品质表达个人观点（篇章3） 阅读下面短文，根据题目要求用英文回答问题。 “When I grow up, I want to be a runner.” These words are spoken by thousands of Kenyan children. 50 percent of the Kenyan top runners are members of Kalenjin, one minority race of the country. They make up less than two percent of Kenya’s population. This fact has puzzled sports scientists. They have spent considerable time and effort trying to answer one question: What enables the Kalenjin people to run so fast? Although the question seems simple, finding the answer has proven to be difficult and controversial. A team of Danish sports scientists spent 18 months and discovered the Kalenjins had remarkably slow heart rates even when running long distances. Kalenjins live in high-elevation（高海拔） villages in the Rift Valley in western Kenya. People living at high elevations produce more red blood cells, which aid in the transport of oxygen throughout the body. Because the air is thinner and contains less oxygen at high elevations, the body produces more red blood cells. Scientists believe there is a connection between increased red blood cells and low heart rates and that both may enable high-altitude athletes to outperform those who train at low altitudes. The Danish scientists also studied the bodies of the Kalenjins and compared them to those of the Danes. They found that the Kalenjins have longer “birdlike” legs. The Kalenjins also have lower body mass indexes (a measure of body fat based on weight and height) and shorter bodies than Danish people. As a result of the Danish study, some scientists made the conclusion that the Kalenjins possess what is called a “speed gene.” However, Kenyan runners were offended by this conclusion. They credited their success to hard work and endless hours of training. Although the controversy over the “speed gene” remains unsolved, British runner Mo Farah’s experience offers an interesting perspective on the subject. In 2005, he realized he wasn’t meeting his