h；，且Pa中同时有两种的的/Pa为95%，那么Ph中同时有两种的/Ph<95%Fact:
Asthma,
a bronchial支气管的
condition, is much less common ailment小病 than hay fever花粉热, an allergic inflammation炎症 of the nasal鼻子的 passages.
Fact:
Over
95 percent of people who have asthma also suffer from hay fever.
If the information given as facts above is
true, which of the following must also be true?
A. Hay fever is a for the development of asthma.
B. Asthma is a prerequisite for the development of hay fever.
C. Those who have neither hay fever nor asthma comprise less than 5
percent of the total population.
D. The number of people who have both of these ailments is greater than
the number of people who have only one of them.
E.
The percentage of people suffering
from hay fever who also have asthma is lower than 95 percent.
is the answer E?
Because the rest are definitely wrong..
have somebody could explain it?I am really confused.
Thanks!
Fact:
Over 95 percent of people who have asthma also suffer from hay fever.
和E.The percentage of people suffering from hay fever who also have asthma is lower than 95 percent.
也完全不搭界啊、
请NN指教指教。
E must be ture. less than 95% can be 1%. since asthma is less common
A.B talking about development, irrelevance
C Those who have neither hay fever nor asthma comprise less than 5 percent of the total population. we can not get this conclusion.
D. The number of people who have both of these ailments is greater than the number of people who have only one of them we can not get this conclusion.
I think this question need some mathematics knowledge such as sets. Remeber there is a intersection between Asthma and Hay fever, so use a Venn Diagram you can easily crack the confusion. Any problem?
Find important words, which indicate a logical relationship.
Fact:
Asthma is much less common .. than hay fever ==> A< H≤100%
Fact:
Over
95 percent of people who have asthma also suffer from hay fever. ==> A ∩ H =95% A
The only right conclusion is A ∩ H =95% A < 95% H≤95%
E. The percentage of people suffering from hay fever who also have asthma is lower than 95 percent.
设想E中间的百分比如果是超过95%,那么我们基本可以推出同时得两种病的概率是95%,这个与题目的一个fact是矛盾的, 前一种病得的概率比较小,所以不能超过 95%
一个反证吧.
这是一道包含数学公式的题：
Pa<h；，且Pa中同时有两种的的/Pa为95%，那么Ph中同时有两种的/Ph<95%
大家也可以用维恩图来考虑，更直观，不过恐怕在考场上...呵呵
Fact:
Asthma,
a bronchial支气管的
condition, is much less common ailment小病 than hay fever花粉热, an allergic inflammation炎症 of the nasal鼻子的 passages.
Fact:
Over
95 percent of people who have asthma also suffer from hay fever.
If the information given as facts above is
true, which of the following must also be true?
A. Hay fever is a for the development of asthma.
B. Asthma is a prerequisite for the development of hay fever.
C. Those who have neither hay fever nor asthma comprise less than 5
percent of the total population.
D. The number of people who have both of these ailments is greater than
the number of people who have only one of them.
E.
The percentage of people suffering
from hay fever who also have asthma is lower than 95 percent.
原文:A是比HF更加不常见的疾病,超过95%有A病的人同时也得了HF病à得了HF病又得了A病的人少于95%(比方说有100个人得A,120个人得HF,那么有95个人得了A和HF两种病,但是95个人的数量在120个HF病人中,明显少于95%)
A:HF是A的前提—原文没有提到前提概念,无关
B:A是HF的前提—原文没有提到前提概念,无关
C:所有人群中,同时得了A和HF两种病的人少于5%--原文没有提到所有人群,无关
D两种病都得的人的数量比得一种病的人的数量少—不一定
E正确
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