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.

请问为什么不是A？❓

请问此题为什么不是B而是E？

为什么不是C？

@May 老师，想请问一下GMAT考试数学部分，代数题目多吗？在整个31道题中，大概会占多少比例？考察点是有规律地按比例出现吗？有的话，几何、应用题等又分别占比多少？谢谢！

请唐塘老师解答下这道主旨题如何通过范围大小作答是?D和C比的时候比不出来. 其他几个可以说说思路吗 我对比下老师的思路和我排除的思路

金老师，有两个问题烦请帮忙解答。@金栩竹 1. 语法基础课，定语从句，例8，答案选C，主语是A pair of architects，谓语动词不是应该用单数形式嘛？ 2. 为什么说GMAT中不会出现which指代整句？

金栩竹老师，不好意思，因为我有几道题目想并在一起比较一下，所以还是通过截图来提问了hhh,第一道问过的这题，老师你说可以通过it无所指来去掉选项，但是it不是很明确地指代前面的43 percent嘛，老师你不是说代词只要看到有可以指代的就可以pass吗，还有compared with 后面是不是得紧跟要比较的对象，不能是a dacade ago，而且compared with a dacade ago是不是不能想成是省略一部分内容啊？就是类似于than以前后省略一部分，只留下状语这样。 第二题，比较对象是数字，所以不能用those指代人对嘛？ 第三题，为啥c不对啊？谢谢老师!

金栩竹老师，我想请教一下这个题目，能麻烦讲一下每个选项到底哪个和哪个在比，哪里错了嘛，我就是遇到xxx percentage of xxx，这种不知道怎么比较，到底对象是数字还是人

金栩竹老师，请问having done不能限制性修饰名词这是什么意思？E 选项不看别的错误点，只看having done 和were butchered不能平行，是因为时态不能平行:现在完成时和过去时不能平行还是因为主动与被动态不能平行呢？

请问唐塘老师这道题,由于我看的录播无法听到此作业题讲解时提问. 这道题你在讲的时候说用UG定位然后通过读文章发现并不是实验的结果然后再看上面一句. 我当时做题时直接用的是Theoretical economist的观点定位可以吗? 因为这和之前你讲的那个K`s objextion to M`theory差不多应该定位M的理论. 你要想undermine和object.那得和Theoretical economists说的内容沾边. 请问这样思考对吗?