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151#
 楼主| 发表于 2004-5-17 00:03:00 | 只看该作者
以下是引用stella131在2004-5-16 23:38:00的发言:

帅哥~牛牛~~


3)~A -> ~B (否命题型加强)这个不懂~帅哥帮忙解释一下,可以吗?


哈哈,是睡熊帅哥牛牛,我是鹦鹉学舌!!


6. The population of peregrine falcons猎鹰 declined rapidly during the 1950's and 1960's and reached an all-time low in the early 1970's. The decline was attributed by scientists to the widespread use of the pesticide DDT in rural areas.



Which of the following, if true, gives the strongest support to the scientits claim?


(A) DDT was not generally in use in areas devoted to heavy industry. 无关


(B) In the time since the use of DDT was banned in 1972, the population of peregrine falcons has been steadily increasing.




(C) Peregrine falcons, like other birds of prey, abandon eggs that have fallen out of the nest, even if the eggs remain intact. 无关


(D) Starlings八哥, house sparrows, and blue jay-birds松鸦 the peregrine falcon prey on-were not adversely affected by DDT in their habitats.


(E) Other birds of prey, such as the osprey鱼鹰, the bald eagle, and the brown pelican鹈鹕, are found in the same areas as is the peregrine falcon. 无关


B“DDT,增加”加强“DDT,减少”!(哈哈,记得有DDT这道题,到FF的WORD讲义里,编辑->查找->DDT,立刻这道题就出来了)


[此贴子已经被作者于2004-5-17 0:16:36编辑过]
152#
发表于 2004-5-17 00:17:00 | 只看该作者
牛人那……,加油!
153#
 楼主| 发表于 2004-5-17 01:16:00 | 只看该作者
以下是引用kevinwww在2004-5-16 0:13:00的发言:

多谢大家的鼓励,再接再厉!!!


引用"睡熊"的总结:


判断的原则是:对于A -> B,


可以加强的形式有:




(1)A有效并保持;(2)B可能;(3)~A -> ~B (否命题型加强);(4)A -> B (原文改写型加强)




可以削弱的形式有:



(1)A无效或已不保持;(2)B不可能;(3)B -> A (因果关系颠倒型削弱);(4)A -> ~B (否定结论型削弱)




其它形式都不构成加强或削弱。对照你找到的所有例子,看看是不是已经非常清楚了(检验一下有没有例外的情况)



细分-总结:


对于A -> B


可以加强的形式有:


(1)A有效并保持


(2)B可能      (罗嗦法)


(3)C->A->B    (搭桥法)




(4)A -> B     (原文改写型加强)



(5)~A -> ~B   (否命题型加强 — 异因异果)


(6)具体事例   (讲与A一致的具体例子)




可以削弱的形式有:



(1)A无效或已不保持 (釜底抽薪 — 无因)



(2)B不可能    (抬杠法 — 无果)


(3)B -> A     (因果关系颠倒型削弱 — 因果倒置)


(4)A -> ~B    (否定结论型削弱 — 同因异果)


(5)~A -> B    (去掉前提型削弱 — 无因有果)

(6)C -> B     (他因法 — 异因同果)
有点困了,希望还没晕(好像有重的,先美其名曰-细分,折腾了半天还是那几个基本的)


[此贴子已经被作者于2004-5-17 1:30:10编辑过]
154#
发表于 2004-5-17 01:42:00 | 只看该作者
kevin等我两到四天.....等我出关同你讨论.....
155#
 楼主| 发表于 2004-5-17 01:54:00 | 只看该作者
好,等你出关扁我!!!(我赶紧闭关去了)
156#
发表于 2004-5-17 01:56:00 | 只看该作者
还灌.........扁扁扁....
157#
 楼主| 发表于 2004-5-17 02:08:00 | 只看该作者

忘了你老哥是白天,和你耗不起,我闪!


[此贴子已经被作者于2004-5-17 11:24:17编辑过]
158#
发表于 2004-5-17 02:09:00 | 只看该作者
去睡啦.....别灌啦.....等你切搓CR啊.....
159#
发表于 2004-5-17 05:07:00 | 只看该作者
以下是引用kevinwww在2004-5-17 0:03:00的发言:


哈哈,是睡熊帅哥牛牛,我是鹦鹉学舌!!


6. The population of peregrine falcons猎鹰 declined rapidly during the 1950's and 1960's and reached an all-time low in the early 1970's. The decline was attributed by scientists to the widespread use of the pesticide DDT in rural areas.



Which of the following, if true, gives the strongest support to the scientits claim?


(A) DDT was not generally in use in areas devoted to heavy industry. 无关


(B) In the time since the use of DDT was banned in 1972, the population of peregrine falcons has been steadily increasing.





(C) Peregrine falcons, like other birds of prey, abandon eggs that have fallen out of the nest, even if the eggs remain intact. 无关


(D) Starlings八哥, house sparrows, and blue jay-birds松鸦 the peregrine falcon prey on-were not adversely affected by DDT in their habitats.


(E) Other birds of prey, such as the osprey鱼鹰, the bald eagle, and the brown pelican鹈鹕, are found in the same areas as is the peregrine falcon. 无关


B“DDT,增加”加强“DDT,减少”!(哈哈,记得有DDT这道题,到FF的WORD讲义里,编辑->查找->DDT,立刻这道题就出来了)



我认为A可以用来削弱,直接否定原因,符合削弱方式1和5(好象1和5有点重合?)。请指正。

160#
发表于 2004-5-17 05:56:00 | 只看该作者
以下是引用kevinwww在2004-5-17 1:16:00的发言:



细分-总结:


对于A -> B


可以加强的形式有:


(1)A有效并保持


(2)B可能      (罗嗦法)


(3)C->A->B    (搭桥法)





(4)A -> B     (原文改写型加强)




(5)~A -> ~B   (否命题型加强 — 异因异果)


(6)具体事例   (讲与A一致的具体例子)





可以削弱的形式有:




(1)A无效或已不保持 (釜底抽薪 — 无因)




(2)B不可能    (抬杠法 — 无果)


(3)B -> A     (因果关系颠倒型削弱 — 因果倒置)


(4)A -> ~B    (否定结论型削弱 — 同因异果)


(5)~A -> B    (去掉前提型削弱 — 无因有果)

(6)C -> B     (他因法 — 异因同果)
有点困了,希望还没晕(好像有重的,先美其名曰-细分,折腾了半天还是那几个基本的)




偶把它拖到自己家里,每天看一遍。
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