关汉卿、董解元、王实甫都是元代杂剧作家。()

一个人不与他人发生关系时就具有的本性叫人的自然本性。() 点击查看答案&解析

Part B (10 points)You are going to read a text about the approaches to creating championship, followed by a list of examples. Choose the best example.(41) What do you need in order to be a record breaker?Sports experts agree that the single most important factor in creating a champion is genetic make-up, the possession of genes that impart an innate ability to stride leap, burn energy efficiently or suck lots of oxygen from the air. 'The great athletes are genuine statistical outliers...physiological freaks,' says sports scientist Craig Sharp of Brunel University in Middlesex, UK.(42) How will we find or create the next generation of champion athletes?The most likely way is to widen our search to find someone with a genetic makeup that allows him or her to surpass other athletes. When East African runners began competing internationally, for example, it became apparent that their light frame. make them uniquely economical in their use of energy.(43) Have we reached the limit of human performance?No, but records are being broken by ever narrower margins. When statisticians plot how the best performance in a given event changes over time, they see the graph leveling off. And the shorter the event, the smaller are the slivers of time being shaved off. So al though Paula Radcliffe has sliced whole seconds off the marathon world record, sprinters are improving by mere hundredths of a second.(44) Will we ever reach an absolute limit?Theoretically, an absolute time to how far or fast the human body can go does, but 'where it is we don't know,' says Millar. Perhaps the only way we can recognize the ultimate performance will be retrospectively, after a record has stood for years.(45) In future, will athletes simply test their limits in new ways? 点击查看答案