大全-3-19

gmatjh

Yes, I see. Thanks so much!!

dashasha

实在不明白,为什么选A不选D呢?A怎么能CONFIRM科学家们的假设呢?

dashasha

我想明白了,不用回答我的问题了.

snowjing

以下是引用dorbear在2004-6-25 5:36:00的发言：
The affirmative pattern for the argument A -> B here is: -A -> -B

只有逆否命题和原命题等价吧 (A->B <=> -B->-A)

请知道的XDJM们可否告知A,B代表的具体情况, 可具体讨论之.

谢谢!

snowjing

不好意思, 忘了看下面的了. (浏览器有问题)

不用回答了.

wheretogo

but "-A" should be those descended from peoples situated throughout their history in Senegal and Gambia (imply low-salt diets)+ genes that adapted to an environmental not scarcity of salt

so the issue is that "genes" doesn't appear in (A), then how can it support?

ethyl

but "-A" should be those descended from peoples situated throughout their history in Senegal and Gambia (imply low-salt diets)+ genes that adapted to an environmental not scarcity of salt
so the issue is that "genes" doesn't appear in (A), then how can it support?

those descended from peoples situated throughout their history 这句话里面不是暗含了基因的因素吗。

A说现在西化的非洲S和G人，他们从祖先到现在都适应了有盐的环境，现在即使是高盐的环境，而且血压也不高。

原文说的是，西化的非洲人，历史上适应了缺盐的环境，现在吃高盐的食物，血压就高。

形成A--->B

那么非A--->非B加强。

agirlnotsmart

以下是引用dorbear在2004-6-25 5:36:00的发言：
The affirmative pattern for the argument A -> B here is: -A -> -B

只有逆否命题和原命题等价吧 (A->B <=> -B->-A)

请知道的XDJM们可否告知A,B代表的具体情况, 可具体讨论之.

谢谢!

非常的晕为什么A -> B here is: -A -> -B

agirlnotsmart

又想了一次，还是不明白为什么The affirmative pattern for the argument A -> B here is: -A -> -B，不是应该逆否命题才能推出原命题吗？

5555555555555，

到底是怎么回事呀？

哪位ＮＮ帮忙解释一下喽！

agirlnotsmart

再顶一下