ChaseDream
搜索
返回列表 发新帖
查看: 1465|回复: 4
打印 上一主题 下一主题

请问a是b的充分条件则b是a的必要条件,对吗?

[复制链接]
跳转到指定楼层
楼主
发表于 2016-7-26 23:09:36 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
请问a是b的充分条件则b是a的必要条件,对吗?

谢谢!!
收藏收藏 收藏收藏
沙发
发表于 2016-7-27 17:04:38 | 只看该作者
不是 如果b是a的必要条件的话  那就成为充要条件了
板凳
 楼主| 发表于 2016-7-27 20:15:45 | 只看该作者
嗯?应该是如果a是b的充分条件且a是b的必要条件的时候,才说a是b的充要条件吧。。。
地板
发表于 2016-7-27 20:18:42 | 只看该作者
想说这个和gmat有关系吗?有没有实际的题目看一下
5#
 楼主| 发表于 2016-7-27 20:29:57 | 只看该作者
嗯,总是做错一些考察类似概念的题,具体的就那下面这个当例子吧。谢谢大家。。。

If there are any inspired musical performances in the concert, the audience will be treated to a good show. But there will not be a good show unless there are sophisticated listeners in the audience, and to be a sophisticated listener one must understand one’s musical roots. If all of the statements above are true, which one of the following must also be true?
A. If there are no sophisticated listeners in the audience, then there will be no inspired musical performances in the concert.
B. No people who understand their musical roots will be in the audience if the audience will not be treated to a good show.
C. If there will be people in the audience who understand their musical roots, then at least one musical performance in the concert will be inspired.
D. The audience will be treated to a good show unless there are people in the audience who do not understand their musical roots.
E. If there are sophisticated listeners in the audience, then there will be inspired musical performances in the concert.
您需要登录后才可以回帖 登录 | 立即注册

Mark一下! 看一下! 顶楼主! 感谢分享! 快速回复:

手机版|ChaseDream|GMT+8, 2025-6-11 13:58
京公网安备11010202008513号 京ICP证101109号 京ICP备12012021号

ChaseDream 论坛

© 2003-2025 ChaseDream.com. All Rights Reserved.

返回顶部