大全-13-3关于假设的取非

3.     Within 20 years it will probably be possible to identify the genetic susceptibility an individual may have toward any particular disease. Eventually, effective strategies will be discovered to counteract each such susceptibility. Once these effective strategies are found, therefore, the people who follow them will never get sick.

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

(A) For every disease there is only one strategy that can prevent its occurrence.无关

(B) In the future, genetics will be the only medical specialty of any importance.遗传学很重要。是事实，与原文无关

(C) All human sicknesses are in part the result of individuals’ genetic susceptibilities.

(D) All humans are genetically susceptible to some diseases.（C）

(E) People will follow medical advice when they are convinced that it is effective.无关

答案是C 这题中有可能是假设的只有C/D

请问在C/D中取非 对于范围的取非该如何处理 包括名词的范围all human sicknesses/all humans 与动词的范围are in part

谢谢

M-15-14

14.   Although computers can enhance people’s ability to communicate, computer games are a cause of underdeveloped communication skills in children. After-school hours spent playing computer games are hours not spent talking with people. Therefore, children who spend all their spare time playing these games have less experience in interpersonal communication than other children have.

The argument depends on which of the following assumptions?

(A) Passive activities such as watching television and listening to music do not hinder the development of communication skills in children.无关

(B) Most children have other opportunities, in addition to after-school hours, in which they can choose whether to play computer games or to interact with other people.无关

(C) Children who do not spend all of their after-school hours playing computer games spend at least some of that time talking with other people.

(D) Formal instruction contributes little or nothing to children’s acquisition of communication skills.无关（C）

(E) The mental skills developed through playing computer games do not contribute significantly to children’s intellectual development.无关

答案是C

请问对C如何取非

因为它也有个范围的问题:at least some of the time

谢谢

C取非为Children who do not spend all of their after-school hours playing computer games DONOTspend at least some of that time talking with other people.即另一类小孩没有花时间和别人交谈。这样两类小孩就不存在谁LESS的问题，结论不成立。at least some =SOME

谢谢lawyer

那么一楼的C/D如何取非

我常常为取非的范围非常困惑

谢谢

All----not all

lawyer 谢谢你 你的考期就到了 先专心备考吧

不知哪位XDJM能帮帮我C/D如何取非

C) All human sicknesses are in part the result of individuals’ genetic susceptibilities.

(D) All humans are genetically susceptible to some diseases.

在此先谢过了

C)NOT all human sicknesses are in part the result of individuals’ genetic susceptibilities.

(D) NOT all humans are genetically susceptible to some diseases.

如果如lawyer所说 如何判断C是答案而D不是呢

因为两个取非后全是不完全否定not all

取非后就很明显了啊，C：不是所有的疾病都跟免疫力有关，那即使科学发达到找到了方法提高免疫力，人们还是可能sick的。D：不是所有人都对某些疾病无法免疫，OK，能免疫的人，本身就不需要这种科学技术了，不能免疫的人，也无法说明这种科学技术不能阻止人们生病啊。无关。

我觉得本题是看focus比较快：C的focus是sicknesses，不但与原文的sick对应，而且all sicknesses和never get sick也对应。D的focus是all human，明显扩大了原文people who follow...的范围。而且其实原文的重点是在讨论基因免疫能否杜绝sick，不是在讨论是不是所有人都对某些disease不免疫。（仔细点的话，disease和sick也是有区别的啊）

携隐  谢谢你的答复

我主要想搞明白了范围的取非

C：不是所有的疾病都跟免疫力有关，那即使科学发达到找到了方法提高免疫力，人们还是可能sick的。

如果一些疾病跟免疫力有关 那么找到方法提高免疫力能解决问题

如果一些疾病跟免疫力无关 那么找到方法提高免疫力 没法解决问题

那么取非C 并不能完全否定答案啊

这该如何理解呢

谢谢