2. 外语
  3. Since 1955, life expectancy rates in the U. S. have Compared with the country with the longest life expectancy, the U. S. is

Since 1955, life expectancy rates in the U. S. have Compared with the country with the longest life expectancy, the U. S. is

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问题 Since 1955, life expectancy rates in the U. S. have
Compared with the country with the longest life expectancy, the U. S. is
选项 A、nearly 3 years behind
B、nearly 4 years behind.
C、nearly 6 years behind
D、nearly 8 years behind.
答案C
解析 短文的第四段说，预期寿命最长的国家是安哥拉，为83.5岁，而美国只有78岁，因此相差大约6岁。
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