逻辑机经！奶牛奶牛！

floraxue2011

Milk cows have higher milk yield when feed onboth B & C than only on C. a survey let the cows feed on WHEREVER they likeon the field that has both B & C (my understanding is that the cows canwalk around instead of being confined...). And the cows in the survey havehigher milk yields than ever before.
Which of the following can most possibly be concluded based on the above info.
a. Proportion of B & C on the survey field doesn't matter....
b. Milk cows weight less after the survey than normal cows....
c. Milk cows in the survey feed on both B & C....
其他的也不记得了。。。我好像选了C

floraxue2011

c不是重复了题目中的前提，“a survey let the cows feed on WHEREVER they likeon the field that has both B & C”？？

问conclusion的话，可以推出前提吗？疑惑

liangw

Hi 楼主还是我 ^_^  在不知道D,E，也不是很确定C的情况下，我更偏向A
说吃B，C比单吃C的牛要产的多，因为一个调查把牛放有B有C的场子里随便吃，调查里的牛比之前要产更多奶。唯一可确定的是，B，C比例多少不重要，重要的是B, C一起吃。但这题挺残的，我也不知道说的对不对？？？？还是请逻辑牛人验证一下。。。


Prep里还是有道跟这逻辑很类似的

From 1980 to 1989, total consumption of fish in the country of Jurania increased by 4.5 percent, and total consumption of poultry products there increased by 9.0 percent. During the same period, the population of Jurania increased by 6 percent, in part due to immigration to Jurania from other countries in the region.

If the statements above are true, which of the following must also be true on the basis of them?

A. During the 1980's in Jurania, profits of wholesale distributors of poultry products increased at a greater rate than did profits of wholesale distributors of fish.
B. For people who immigrated to Jurania during the 1980's, fish was less likely to be a major part of their diet than was poultry.
C. In 1989 Juranians consumed twice as much poultry as fish.
D. For a significant proportion of Jurania's population, both fish and poultry products were a regular part of their diet during the 1980's.
E. Per capita consumption of fish in Jurania was lower in 1989 than in 1980.


答案是E

mliverpool

楼主的记忆太厉害了

mliverpool

我觉得楼主在一楼的自问自答很有爱~~我感觉c应该不是conclusion，因为已经包含在前提了1~~

floraxue2011

哈哈哈。。
我也倾向于“b和c的比例没有关系”，即A

龊龊要苦修

谢谢LZ，好记忆啊，佩服！

huangraul

寻牛牛！