陆旭老师，我有一些做过的assumption题目取非的句子搞不清，你能帮忙看下吗(不说这道题目的解题思路，单纯就是取非问题，特别是双重否定或者从句里面有否定词） 1.No part of a person’s brain that is damaged by a stroke ever recovers.---> some part of a person's brain that is damaged by a stroke ever recovers. 2.Impairment of linguistic capabilities does not occur in people who have not suffered any damage to any language center of the brain.这个句子我不太会取非，正过来说这个句子就是Impairment of linguistic capabilities occurs in people who have suffered any damage to any language center of the brain.那么我取非是Impairment of linguistic capabilities occurs in people who have not suffered any damage to any language center of the brain. 3.If there are language centers on the left side of the brain, any serious stroke affecting that side of the brain damages at least one of them. 取非If there are language centers on the left side of the brain, any serious stroke affecting that side of the brain damages nothing of them. 4.这题出现两个not The collection fee will not significantly affect the purchasing power of most residents, even if their households do not reduce the amount of trash they put out. 我取非直接去前面的not: The collection fee will significantly affect the purchasing power of most residents, even if their households do not reduce the amount of trash they put out. 5.这个也差不多 Not all steel producers were unaffected by country A’s newly imposed tariffs. 我取非All steel producers were unaffected bycountry A’s newly imposed tariffs. 6.There are no plants native to western Africa that, if domesticated, could serve as staple food crops. 这个if domesticated是不是可以不管，直接改成There are some plants native to western Africa that, if domesticated, could serve as staple food crops.

这道题感觉像是要找规律，但还是没有思路，想请教一下老师，谢谢

麻烦唐瑭老师解答一下～这道题在做的时候我其实问题有点没读懂，就读了最后一句，然后提取出来的关键点是在讲tax一直在征收but汽油的税收没有增加，只有CE选项提到的汽油，但是C在讲汽油进口是新东西，所以我选了E。想麻烦老师解释一下正确选项C，再告知一下这道题应该看哪句话。谢谢～

这道题答案选E但我选了D，难道这里的land不是动词然后intact不应该用副词吗？求解答谢谢！

麻烦唐瑭老师解答一下～这道题我做对了，但是没太懂，我定位了最后一句，感觉在讲maize和monarch butterfly之间的关系。没太读懂各选项，但只有C提到了这两个东西，所以选了C。麻烦老师讲解一下～

请王文静老师回答一下这个问题，谢谢！具体疑惑附在图二了

麻烦唐瑭老师解答一下～这道题看了题目后我没有回看题干，想问一下题目是不是在说利润增涨和涨价没有关系？我选了D，正确答案C，麻烦老师讲一下CD，谢谢～

这道题选E，我错选了D，请唐瑭老师讲解一下这种类型的题该怎么写？必须看完全文吗？怎么对比选项？希望老师把方法讲得详细一点，谢谢！

请王文静老师解答一下，谢谢1.不太会判断ACD（C是因为the magazines’…consumption to convince…money无法作主语？D是因为with不好所以排除？2. 感觉后半段“出版者说服R地中产去花钱是内政主要部分”和破折号之前部分的句意并列不了

老师我想问一下这道题，从6b=ab不是可以推出a=6吗，有点懵，求解答谢谢老师！

这道题答案选A，请问老师怎么用A推出来呀？我自己总感觉虽然能确定四个数的大小，但是比值大小不太确定