[求助] 蓝皮书 - GMAT 精选练习题（评估题）- 4 （第295页）

开若兰

Hardin argued that grazing land held in common （that is， open to any user） would always be used less carefully than private grazing land. Each rancher would be tempted to overuse common land because the benefits would accrue to the individual， while the costs of reduced land quality that results from overuse would be spread among all users. But a study comparing 217 million acres of common grazing land with 433 million acres of private grazing land showed that the common land was in better condition.

　　The answer to which of the following questions would be most useful in evaluating the significance， in relation to Hardin's claim， of the study described above？

　　（A） Did any of the ranchers whose land was studied use both common and private land？

　　（B） Did the ranchers whose land was studied tend to prefer using common land over using private land for grazing？

　　（C） Was the private land that was studied of comparable quality to the common land before either was used for grazing？

　　（D） Were the users of the common land that was studied at least as prosperous as the users of the private land？

　　（E） Were there any owners of herds who used only common land， and no private land， for grazing？

这道题的标准答案是（C）。之所以会做错，是本人的阅读能力不够好。有没有高人指点一下（C）选项中蓝色字体部分是什么意思？修饰的是 common land 吗？

wisp2002

the most important about the comparison are as below:

1/ is the the base of comparison the same ?

2/the the standard of comparison the same ?

queenieli

不是高人，但是試試。我認為藍字應該是說 在他們兩個都允許放牧之前。

c這個選項的意思是說 在比較（被允許放牧后的）公共土地和私人土地的質量之前，有沒有比較這兩類土地沒有允許放牧前的質量。

开若兰

谢谢！

奋斗GMAT中

结果量和过程量的对比，要确定初始条件