一些逻辑问题的分析

frankzhiwei

lz，您的确了得，这道题麻烦您说说好吗？
http://forum.chasedream.com/GMAT_CR/thread-486251-1-1.html

songhanxiao

哇~多谢啦~受益匪浅啊~

aomeisoft7

lz，您的确了得，这道题麻烦您说说好吗？
http://forum.chasedream.com/GMAT_CR/thread-486251-1-1.html

-- by 会员 frankzhiwei (2010/9/25 0:26:47)

已回答到你帖子啦~

小鬼和灵

155. The proportion of women among students enrolled in higher education programs has increased over the past decades. This is partly shown by the fact that in 1959, only 11 percent of the women between twenty and twenty-one were enrolled in college, while in 1981, 30 percent of the women between twenty and twenty-one were enrolled in college.

To evaluate the argument above, it would be most useful to compare 1959 and 1981 with regard to which of the following characteristics?
(A) The percentage of women between twenty and twenty-one who were not enrolled in college
(B) The percentage of women between twenty and twenty-five who graduated from college
(C) The percentage of women who, after attending college, entered highly paid professions
(D) The percentage of men between twenty and twenty-one who were enrolled in college
(E) The percentage of men who graduated from high school





题目中说的是The proportion of women among students，为什么答案写的是D，可以表达women和men合起来完整性？

leanncx

楼主。。以后我的逻辑就靠你了啊。。
我的逻辑真的蛮烂的。。
你传授传授经验呗~

-- by 会员 leanncx (2010/9/24 23:56:23)

你遇到不会的题目就贴上来一起讨论咯
空说理论的话米有很大用啦

-- by 会员 aomeisoft7 (2010/9/25 0:23:30)

恩恩。必须的~哈哈~

syq819

非常感谢你哦！！

aomeisoft7

155. The proportion of women among students enrolled in higher education programs has increased over the past decades. This is partly shown by the fact that in 1959, only 11 percent of the women between twenty and twenty-one were enrolled in college, while in 1981, 30 percent of the women between twenty and twenty-one were enrolled in college.

To evaluate the argument above, it would be most useful to compare 1959 and 1981 with regard to which of the following characteristics?
(A) The percentage of women between twenty and twenty-one who were not enrolled in college
(B) The percentage of women between twenty and twenty-five who graduated from college
(C) The percentage of women who, after attending college, entered highly paid professions
(D) The percentage of men between twenty and twenty-one who were enrolled in college
(E) The percentage of men who graduated from high school





题目中说的是The proportion of women among students，为什么答案写的是D，可以表达women和men合起来完整性？

-- by 会员 小鬼和灵 (2010/9/25 10:39:13)

女生占 入学总人数(男+女) 比例上升。可以从下面这个例子看出来：1959年， 11% 的 20-21岁的女生入学；1981年，30%的 20-21岁女生入学。


求评价
打比方，20-21岁女生一共100人。1959年11个女人入学，1981年30个女生入学。
但是     女生占入学总人数比=女生数/(女生数+男生数)            这里缺少男生数条件
虽然女生的绝对数值在上升，但如果男生入学人数上升的更快，那 女生占总人数的比值反而会下降

Helloface

求助大牛一道题~~~~~~~
Which of the following most logically completes the argument below?
According to promotional material published by the city of Springfield, more tourists stay in hotels in Springfield than stay in the neighboring city of Harristown.  A brochure from the largest hotel in Harristown claims that more tourists stay in that hotel than stay in the Royal Arms Hotel in Springfield.  If both of these sources are accurate, however, the “Report on Tourism” for the region must be in error in stating that __________.
A. the average length of stay is longer at the largest hotel in Harristown than it is at the Royal Arms Hotel
B. there is only one hotel in Harristown that is larger than the Royal Arms Hotel
C. more tourists stay in hotels in Harristown than stay in the Royal Arms Hotel
D. the Royal Arms Hotel is the largest hotel in Springfield
E. the Royal Arms Hotel is the only hotel in Springfield
答案是C，如果排除的话能选出来，但是不太明白，关键是“must be in error in stating that ”，到底是让选错的还是正确的？

aomeisoft7

求助大牛一道题~~~~~~~
Which of the following most logically completes the argument below?
According to promotional material published by the city of Springfield, more tourists stay in hotels in Springfield than stay in the neighboring city of Harristown.  A brochure from the largest hotel in Harristown claims that more tourists stay in that hotel than stay in the Royal Arms Hotel in Springfield.  If both of these sources are accurate, however, the “Report on Tourism” for the region must be in error in stating that __________.
A. the average length of stay is longer at the largest hotel in Harristown than it is at the Royal Arms Hotel
B. there is only one hotel in Harristown that is larger than the Royal Arms Hotel
C. more tourists stay in hotels in Harristown than stay in the Royal Arms Hotel
D. the Royal Arms Hotel is the largest hotel in Springfield
E. the Royal Arms Hotel is the only hotel in Springfield
答案是C，如果排除的话能选出来，但是不太明白，关键是“must be in error in stating that ”，到底是让选错的还是正确的？

-- by 会员 Helloface (2010/9/25 16:05:58)

这题答案不是C，是E
游客总数：S > H
royal arms hotel in S < lagest hotel in H


问：如果这2个条件是正确的，那么下面哪一条 是绝对错误的 （即会与题中2个条件矛盾的），而其他选项则是可能成立的
E： royal arms 是S 唯一的宾馆
如果royal arms是唯一的，那么住在royal的游客=S的游客总数，S的游客总数<lagest hotel in H
那么 S的游客数就不可能大于H的游客数了

麦兜woo

GWD-9-Q12:

A mosquito bite can transmit to a person the parasite that causes malaria, and the use of mosquito nets over children’s beds can significantly reduce the incidence of malarial infection for children in areas where malaria is common. Yet public health officials are reluctant to recommend the use of mosquito nets over children’s beds in such areas.

Which of the following, if true, would provide the strongest grounds for the public health officials’ reluctance?

A. Early exposure to malaria increases the body’s resistance to it and results in a lesser likelihood of severe life-threatening episodes of malaria.

B. Mosquito bites can transmit to people diseases other than malaria.

C. Mosquito nets provide protection from some insect pests other than mosquitoes.

D. Although there are vaccines available for many childhood diseases, no vaccine has been developed that is effective against malaria.

E. The pesticides that are most effective against mosquitoes in regions where malaria is common have significant detrimental effects on human health.

答案选A，但是不明白，按我的理解A选型不是削弱了the public health officials’ reluctance。A说Early exposure to malaria 能提高对 malaria 的抵抗，降低遭遇威胁生命的malaria可能性，这样说来不更应该使用mosquito nets 的方法，而the public health offical 拒绝使用这种方法，从而削弱the public health officials’ reluctance？