last section 1 6-24 请教

愉悦

清高手指点：Section 1.
6) No senator spoke at the convection unless he or she was a Democrat. No Democrat both spoke  at the convention and was a senator.
Which one of following conclusions can be correctly drawn from statement above?
A.        No one but senator spoke at the convention
B.        No Democrat spoke at the convention
C.        Only  Democrat spoke at the convention
D.        No senator spoke at the convention
E.        Some Democrat spoke at the convention
此类型有什么好方法快速解题？
24) An unbiased observer of everyday encounter in the Western societies would surely not fined many instances of unkindness by people under 65 toward 65 above .There are undoubtedly incidence of unkindness based on age, these warrant reproof .However, the very fact that such reproof occurs and is generally accepted implies that our western societies basically respect the elderly. The same conclusion can  be drawn from a recent survey finding :71 percent of the under 65 population agreed with the statement that “ people over 65 receive too little respect from society” , while only 44 percent of  over-65 population, the target of the alleged irreverence agreed with it.
The author concludes that Western societies basically respect the elderly partly because

A.        People under 65 are just as kind to people over 65 as they are to    people of their oven age group.
B.        survey date suggest that fewer people over 65 than under 65 get too little respect
C.        disrespect for the elderly does not go sofar as to result in actual harm.
D.        Survey data suggest that people over 65 are more aware of incidents involving disrespect to the elderly than are people under 65
E.        Incidents of unkindness to the elderly are neither common nor generally accepted in Western societies.

此题 我有点摸不着头序。

我在本站downlow 了last 电子版，无法粘贴，以上2题 都是敲上去的，很费时间。请问有无办法粘贴？谢谢！

回家过年

oh~~~~,蒙对喽~~~

愉悦

回家过年，

答案正确。 你的思路对我有帮助，谢谢！

回家过年

我现在这表个态:
6)不敢肯定,提干说没有SENATOR在CONVECTION除非是DEMO. 没有DEMO同时CONVECTION和SENATOR.
所以D是S,C的必要条件.第二句话是说D这个必要条件不存在,所以选D---SC不存在.
大家觉得这么想如何? 看来这类题熟记公共元素直推法很重要,不过GMAT不会考这么变态吧.(别告诉我我的答案是错的,那可丢大人了!)

24).提干说老人很少跟人打架,相同的结论调查,71%小孩同意老人不够被尊敬,44%老头认为受尊敬少,其实不被尊敬的比例就是44.
因为E:跟老头打架既不普遍也不被广大西方社会认同.(正好是两个提干论据)

请大家指指点点我!