发信人: mmlydia()
整理人: imstella(2001-01-09 03:35:28), 站内信件
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发信人: [email protected] (真永远), 信区: english
标 题: A question
发信站: 中国科大BBS站 (Tue Mar 17 17:17:27 1998)
转信站: zjbbs!news.zhanjiang.gd.cn!clinux.ml.org!linux.ustc.edu.cn!ustcnews!ust
1.Does 'Some A are not B' equal to 'All A are not B'?
2.There is a condition in a question of GRE analytical section.
It says:
If G does not play, then H and either A or B must play.
Then will it be true if HAB all play? (despite other conditions)
And what's the 逆否命题 of it?
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※ 来源: 中国科大BBS站 [[email protected]]
the answer
1. no, maybe some are b.
2. no, maybe all of them will not play.
3. dear beyond(真永远), please use small letter, because it is
（请使用小写字母。这是由于它可节省时间和金钱，
to save our time & money and show a mild tone.
也可表现出温和的语气。）
maybe u wouldn't think so. never mind, if u were careful,
u would find it on every letter & time. please look at this:
" zjbbs!news.zhanjiang.gd.cn!clinux.ml.org!news.nease.net!not-for-mail
出 处: 155.los-angeles-14.ca.dial-access.att.net"
dear boy, one is in our country, the other is in usa.
why? what's the reason? u see, would u like to think so?
dear young boy, u are clever, i believe. don't worry,
never mind. u will do sth better in future.
8-) :-} lydia 19-3-98
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※ 来源:．广州网易 BBS bbs.nease.net．[FROM: news.foshan.gd.]
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