2. 外语
  3. Lifespan About a century ago, the average lifespan of Americans was about 50 years.

Lifespan About a century ago, the average lifespan of Americans was about 50 years.

admin2022-09-30  77
问题                                 Lifespan
    About a century ago, the average lifespan of Americans was about 50 years.
Lifespan
    About a century ago, the average lifespan of Americans was about 50 years. Today, the typical American lives for around 78 years. / What accounts for such increased longevity? / Between 1900 and 1950, inventions such as refrigeration and sewage treatment / meant that young people were able to survive longer. / Moreover, medical breakthroughs helped contain diseases that killed many children. / This means that future medical breakthroughs will result in even longer average lifespan.
选项
答案 Lifespan About a century ago, the average lifespan of Americans was about 50 years. Today, the typical American lives for around 78 years. / What accounts for such increased longevity? / Between 1900 and 1950, inventions such as refrigeration and sewage treatment / meant that young people were able to survive longer. / Moreover, medical breakthroughs helped contain diseases that killed many children. / This means that future medical breakthroughs will result in even longer average lifespan.
解析
转载请注明原文地址:https://kaotiyun.com/show/cWkK777K
0

专业英语四级

相关试题推荐
随机试题
最新回复(0)