OG. No.10 参考答案在page 562
Meteorite explosions in the Earth’s atmosphere as large as the one that destroyed forests in
The response of highly automated systems controlled by complex computer programs to unexpected circumstances is unpredictable.
Which of the following conclusions can most properly be drawn, if the statements above are true, about a highly automated nuclear-missles defense system controlled by a complex computer program?
A) within a century after its construction, the system would react inappropriatedly and might accidentally start a nuclear war.
B) The system would be destroyed if an explosion of a large meteorite occurred in the Earth’s atmosphere.
C) It would be impossible for the system to distinguish the explosion of a large meteorite from the explosion of a nuclear weapon.
D) Whether the system would respond inappropriatedly to the explosion of a large meteorite would depend on the location of the blast.
E) It is not certain what the system’s response to the explosion of a large meteorite would be, if its designers did not plan for such a contingency.
Choices A and C cannot be inferred since it is consistent with the stated information that no meteorite explosion will occur within a century and that an appropriately designed nuclear defense system might be able to distinguish nuclear from meteorite explosions
自由的理解：A和C不能被正确推断出来，因为它一致于所说的信息：没有流星的爆炸发生在一个世纪时间内。因为一个正确设计的核防御系统可能能够区分核爆炸同流星的爆炸。
自由的问题：结合题目和答案，我没明白OG里上面想表达什么意思。而且从上面字面的含义，我觉得OG的解释方向好象也很牵强，自由自己的理解是，A和C属于原文没有提到的内容，C没提到原文的内容，而A是对原文含义的篡改。
谢谢大家的指教。
另外， 。Choices A and C cannot be inferred since it is consistent with the stated information that no meteorite explosion will occur within a century and that an appropriately designed nuclear defense system might be able to distinguish nuclear from meteorite explosions
上面的两个否定词，到底否定哪个句子的成分呢？这个自由个人认为很重要，因为否定词不管在语法还是阅读中都有举足轻重的作用，谢谢大家的宝贵帮助。
(A)对照原文的premise: Meteorite explosions occur about once a century.
(C)对照原文的premise: The response to unexpected circumstances is unpredictable.
因此OG说Choices A and C cannot be inferred, 跟你的解读一样
至于no meteorite explosion will occur within a century就跟上述的(A)一样
这边不能看成双重否定(不知道是不是你所指的), 因为这里用了个since从句表因为
好像没解答到你的问题, 再请NN看看....
我们还是应仔细理解OG对题目的解释！！！
对于CR-10的A和C的解释(Choices A and C cannot be inferred since it is consistent with the stated information that no meteorite explosion will occur within a century and that an appropriately designed nuclear defense system might be able to distinguish nuclear from meteorite explosions.)，应注意这里的it。it为形式主语，真正的主语是“that no meteorite explosion will occur within a century and that an appropriately designed nuclear defense system might be able to distinguish nuclear from meteorite explosion”,即A和C选项所述内容的反义，即A和C的否命题。这里的句型是：it is + 形容词短语 + that引导的主语从句。
（下面的一段是我个人对OG对A和C解释的理解，可能费解，大家不读也罢，但这段话反映了OG的解释表面简单，其实却暗藏杀机，我们不可不察。唉，思维过程很简单，好像被我越说越复杂了。）
由此，OG表明的意思是：A和C的否命题与文中已陈述信息一致，则A和C不能被推出。其实，OG在此指出的这种逻辑关系很简单，即：已知事件X成立，同时事件Y与事件X一致，则事件Y的否命题可能与事件X不一致，即事件Y的否命题不能被推出。例如，已知事件“我爱老婆”成立，同时事件“我想老婆”与事件“我爱老婆”一致，则事件“我不想老婆”可能与事件“我爱老婆”不一致，即事件“我不想老婆”不能被推出。
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