[原创] assumption题目怎么取非 啊？

看了好多帖子说assumption 的题目最好的方法就是对选项进行取非，我想知道的是，每个选项都要取非么？取非是在选项的那个地方取非呢？

麻烦XDJM们赐教啊！！！我一直都在这个问题上出错~~~

有两个地方可能用到：

1）选项就是带not否定句，不看not（即取非，比较容易看懂），若weaken原文观点即为答案，假设题答案为否定句的几率大；

2）选项是肯定句，可验证选择是否正确，同样也是判断取非后是否weaken;

仅供参考。

我觉得当你看到是Assumption题目的时候，就当成是Weaken的题目去读文章，读文章时努力发现原文的逻辑瑕疵或者明显漏掉的条件，直接定位答案。

如果不行就用相关性排出3个选项，然后对后两个进行取非。（这个时候可能这道逻辑就已经是难题了。）

一般取非，取动词非（感觉读懂了选项句子的意思，取非就比较自然了。）

最好举两个你觉得取非困难得例子，大家一起讨论一下。：）

89. Rhizobium bacteria living in the roots of bean plants or other legumes produce fixed nitrogen, which is one of the essential plant nutrients and which for non-legume crops, such as wheat, normally must be supplied by applications of nitrogen-based fertilizer. So if biotechnology succeeds in producing wheat strains whose roots will play host to Rhizobium bacteria, the need for artificial fertilizers will be reduced.

The argument above makes which one of the following assumptions?

(A) Biotechnology should be directed toward producing plants that do not require artificial fertilize.

(B) Fixed nitrogen is currently the only soil nutrient that must be supplied by artificial fertilizer for growing wheat crops.

(C) There are no naturally occurring strains of wheat or other grasses that have Rhizobium bacteria living in their roots.

(D) Legumes are currently the only corps that produce their own supply of fixed nitrogen.

(E) Rhizobium bacteria living in the roots of wheat would produce fixed nitrogen.

还有就是~~~

110. Animals with a certain behavioral disorder have unusually high levels of aluminum in their brain tissue. Since a silicon-based compound binds to aluminum and prevents it from affecting the brain tissue, animals can be cured to the disorder by being treated with the compound.

The argument is based on which one of the following assumptions?

(A) Animals with the disorder have unusually high but invariable levels of aluminum in their brain tissue.

(B) Aluminum is the cause of the disorder rather than merely an effect of it. 
  

（C） Introducing the compound into the brain tissue has no side effects.
   

(D) The amount of the compound needed to neutralize the aluminum in an animal’s brain tissue varies depending upon the species.

(E) Aluminum is never present in normal brain tissue.

超级无敌感谢NNs的解答~~~我贴出feifei-110具体问一下下~~~取非只对not么？像这道题B的rather than .C的no.

需要取非么？还有我遇到的题目里也会出现more than ,less than 之类的词，这样的题目要取非么？比如55题的no longer 我就不知道要不要取非了。

55. Which one of the following is an assumption that the author relies upon in the passage?

(A) Most incidents involving grizzly bears are fatal.

(B) Grizzly bears are no longer the danger they once were.

(C) The number of fatalities per year is an adequate indication of something’s dangerousness.

(D) A golf course is a particularly dangerous place to be in a thunderstorm.

(E) Something is dangerous only if it results in death in the majority of cases.

好的，谢谢gonghao~~~~heihei ~~~