子。
14. C。由于小男孩的聪明,“除了”他自己,其他仆人都累坏了。
15. D。Do you know why? 用在文章最后用来引出原因,告诉读者其中的奥妙。
阅读理解
J
Do you want to live another 100 years or more? Some experts say that scientific advances will one day enable humans to last tens of years beyond what is now seen as the natural limit of the human life span.
"I think we are knocking at the door of immortality (永生) ,' said Michael Zey, a Montclair State University business professor and author of two books on the future. "I think by 2075 we will see it and that's a conservative estimate(保守的估计)."
At the conference in San Francisco, Donald Louria, a professor at New Jersey Medical School in Newark said advances in using genes as well as nanotechnology(纳米技术)make it likely that humans will live in the future beyond what has been possible in the past. "There is a great push so that people can live from 120 to 180 years, "he said. "Some have suggested that there is no limit and that people could live to 200 or 300 or 500 years. '
However, many scientists who specialize in ageing are doubtful about it and say the human body is just not designed to last about 120 years. Even with healthier lifestyles and less disease, they say failure of the brain and organs will finally lead all humans to death.
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