- UID
- 554116
- 在线时间
- 小时
- 注册时间
- 2010-8-8
- 最后登录
- 1970-1-1
- 主题
- 帖子
- 性别
- 保密
|
楼主可以百度一下 <幸存者偏差>这道题就是考的这个点,GMAT中还有好几题也是这个考点。
1.A physically active lifestyle has been shown to help increase longevity. In the Wistar region of Bellaria, the average age at death is considerably higher than in any other part of the country. Wistar is the only mountainous part of Bellaria. A mountainous terrain makes even such basic activities as walking relatively strenuous; it essentially imposes a physically active lifestyle on people. Clearly, this circumstance explains the long lives of people in Wistar.
Which of the following, if true, most seriously weakens the argument?
Many people who live in the Wistar region have moved there in middle age or upon retirement.
2. In the country of Veltria, the past two years` broad economic recession has included a business downturn in the clothing trade, where sales are down by about 7 percent as compared to two years ago. Clothing wholesalers have found, however, that the proportion of credit extended to retailers that was paid off on time fell sharply in the first year of the recession but returned to its prerecession level in the second year.
Which of the following, if true, most helps to explain the change between the first and the second year of the recession in the proportion of credit not paid off on time?
Of the considerable number of clothing retailers in Veltria who were having financial difficulties before the start of the recession, virtually all were forced to go out of business during its first year.
3. Recent observations suggest that small, earthlike worlds form a very low percentage of the planets orbiting stars in the galaxy other than the sun. Of over two hundred planets that astronomers have detected around other stars, almost all are hundreds of times larger and heavier than the earth and orbit stars much smaller than the sun.
Which of the following, if true, would most weaken the above justification of the claim that earthlike worlds form a low percentage of the total number of planets?
The smaller a planet is relative to the star it orbits, the more difficult it is for astronomers to detect. |
|