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In 1987 sinusitis was the most common chronic medical condition in the United States, followed by arthritis and high blood pressure, in that order. The incidence rates for both arthritis and high blood pressure increase with age, but the incidence rate for sinusitis is the same for people of all ages. The average age of the United States population will increase between 1987 and 2000.

Which of the following conclusions can be most properly drawn about chronic medical conditions in theUnited States from the information given above?

正确答案: C

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[求助] og 174 谢谢! :)

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楼主
发表于 2006-3-14 00:36:00 | 只看该作者

[求助] og 174 谢谢! :)

174. In 1987 sinusitis was the most common chronic medical condition in the United States, followed by arthritis and high blood pressure, in that order.
The incidence rates for both arthritis and high blood pressure increase with age, but the incidence rate for sinusitis is the same for people of all ages.
The average age of the United States population will increase between 1987 and 2000.


Which of the following conclusions can be most properly drawn about chronic medical conditions in the
United States from the information given above?
(A) Sinusitis will be more common than either arthritis or high blood pressure in 2000.
(B) Arthritis will be the most common chronic medical condition in 2000.
(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.
(D) Fewer people will suffer from sinusitis in 2000 than suffered from it in 1987.
(E) A majority of the population will suffer from at least one of the medical conditions mentioned above by the year 2000.


ans: c  我选B


不明白og解释:given the incidence rate for sinusitis is the same for people of all ages, and  that the average age of population will increase, it follows that the average age of people suffering from sinusitis will increse. so c is right.


不是说所有年龄患病率相等吗?所以sinusitis不会more common 呀?!


麻烦哪位解释一下,在讲讲做题思路,谢谢了!:)

沙发
 楼主| 发表于 2006-3-14 10:58:00 | 只看该作者

谢谢coopers的解释!


不好意思,还是不明白,哪位xdjm,nn愿意换个思路讲讲,谢谢!:)

板凳
发表于 2006-3-20 11:54:00 | 只看该作者
以下是引用juliet01192000在2006-3-14 10:58:00的发言:

谢谢coopers的解释!


不好意思,还是不明白,哪位xdjm,nn愿意换个思路讲讲,谢谢!:)


这个帖子沉了好久了。。。来,把它顶上来。

其实,这道题也很简单,可以从题目直接推到C。
因为:the incidence rate for sinusitis is the same for people of all ages. 而The average age of the United States population will increase between 1987 and 2000.--》因为大家都有S这种病(纯粹是为了解题,大家不要骂我),而大家的年龄在1987~2000年都将会很大了。
所以:The average age of people suffering from sinusitis will increase between 1987 and 2000.--》所以,在1987~2000年得S这种病的人年龄将会增大。
这个是顺理成章的推论。就是C。

B肯定不对。A这种病是和HBP这种病一样的,不会most common。

地板
发表于 2006-3-20 11:57:00 | 只看该作者
以下是引用juliet01192000在2006-3-14 0:36:00的发言:

(B) Arthritis will be the most common chronic medical condition in 2000.
(C) The average age of people suffering from sinusitis will increase between 1987 and 2000.


ans: c  我选B


不明白og解释:given the incidence rate for sinusitis is the same for people of all ages, and  that the average age of population will increase, it follows that the average age of people suffering from sinusitis will increse. so c is right.


不是说所有年龄患病率相等吗?所以sinusitis不会more common 呀?!


麻烦哪位解释一下,在讲讲做题思路,谢谢了!:)


S这种病所有年龄的患病几率是相等,所以S不会more common。但并不表示得S这种病的人的年龄不能增大呀。是吗?

5#
发表于 2006-3-22 09:56:00 | 只看该作者
以下是引用juliet01192000在2006-3-14 10:58:00的发言:

谢谢coopers的解释!


不好意思,还是不明白,哪位xdjm,nn愿意换个思路讲讲,谢谢!:)


Hey, do you understand? 请问这道题你明白了吗?说句话呀。害我还要记挂着呢?

6#
发表于 2006-3-23 02:34:00 | 只看该作者

B 肯定不对,假如美国得鼻炎的人是90%,得关节炎的人是60%,得高血压的人是40%,根据文中说随着整体国民年龄的增加,得后两种病的人会增多,可是我们不能推出一定多到超过90%,B说关节炎的人会最多,即超过90%,太绝对,我们只能说不一定.


关于选项C 可以用数学公式推出: 平均年龄=所有人口的年龄/人数,得鼻炎的人的总年龄因为人口的老龄化而增大,(老龄化由文中条件得来),而得鼻炎的总人数是均衡的,因为各个年龄断的发病率是相同的,所以分子增,而分母不变,当然结果变大.


不知道这样理解对吗?

7#
发表于 2006-3-23 09:18:00 | 只看该作者
以下是引用toeflboy2005在2006-3-23 2:34:00的发言:

B 肯定不对,假如美国得鼻炎的人是90%,得关节炎的人是60%,得高血压的人是40%,根据文中说随着整体国民年龄的增加,得后两种病的人会增多,可是我们不能推出一定多到超过90%,B说关节炎的人会最多,即超过90%,太绝对,我们只能说不一定.


关于选项C 可以用数学公式推出: 平均年龄=所有人口的年龄/人数,得鼻炎的人的总年龄因为人口的老龄化而增大,(老龄化由文中条件得来),而得鼻炎的总人数是均衡的,因为各个年龄断的发病率是相同的,所以分子增,而分母不变,当然结果变大.


不知道这样理解对吗?


不用这么复杂的公式吧?直接一推就行了。况且,题目中也没有说鼻炎的总人数是均衡不变的。

8#
发表于 2006-6-22 15:29:00 | 只看该作者
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