- UID
- 480009
- 在线时间
- 小时
- 注册时间
- 2009-10-7
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
19.The U.S. census is not perfect: thousands of Americans probably go uncounted. However, the basic statistical portrait of the nation painted by the census is accurate. Certainly some of the poor go uncounted, particularly the homeless; but some of the rich go uncounted as well, because they are often abroad or traveling between one residence and another. Which of the following is an assumption on which the argument above depends? (A) Both the rich and the poor have personal and economic reasons to avoid being counted by the census. (B) All Americans may reasonably be classified as either poor or rich. (C) The percentage of poor Americans uncounted by the census is close to the percentage of rich Americans uncounted. (D) The number of homeless Americans is approximately equal to the number of rich Americans.(C) (E) The primary purpose of the census is to analyze the economic status of the American population. 看了半天 不知道选C能说明什么问题,这道题的题干是不是要说尽管人口调查有没有统计的人,但是最后的统计结果还是精确的。。。请高手指教。。。
|
|