LSAT 17-1-15,16 也是无关选项的问题。

siebel

Questions 15-16
Computer operating system software has become increasingly standardized. But when a large business with multiple, linked computer systems uses identical operating system software on all of its computers, a computer vandal who gains access to one computer automatically has access to the data on all the computers. Using a program known as a "virus" the vandal can then destroy much of the data on all the computers. If such a business introduced minor variations into its operating system software, unauthorized access to all the computers at the same time could be virtually eliminated. Furthermore variations in operating system software can be created without any lose of computer compatibility to the business. Therefore, it is advisable for businesses to implement such variations.

15. Which one of the following, if true , supports the conclusion in the passage?

(A) Standardization of computer operating system software has increased computer compatibility among different businesses.
(B) Correcting any damage resulting from an invasion by a computer virus program is more expensive than preventing the damage
(C) It is not costly for a business to maintain incompatible computer operating systems.
(D) There are other kinds of destructive computer programs that do not depend on inter computer links.
(E) Not all businesses need to share date among their internal computer systems.

16. Which one of the following can be inferred from the passage?

(A) If a business does not introduce variety into its computer operating systems, It will lose data on its computers because of damage from virus programs.
(B) If a computer virus program is introduced into a business computer, all of the data on that computer will be destroyed.
(C) If a business introduces variety into its linked computer operating systems, it will have increased overall protection for its systems, but will not have protected every computer from viral invasion.
(D) If a business does not have multiple, linked computer systems, its computers cannot be protected from computer viruses.
(E) If minor variations are created in computer operating system software, it will be easier to access the data on the computers that use that software.

15题，答案(B)中Correcting any damage原文没有提到，是否expensive也没有说，怎么就成了答案呢？
16，答案(C)前半部分可以，后半部分but will not have protected every computer from viral invasion 原文也没有见到有讲，怎么就推出来了呢？奇怪ing。

谢谢！

mike1999

15题是加强题，选项B从成本的角度说明了对电脑系统作变动在经济上的可行性。所以可选。加强题不一定适用无关排除。
16题。本文说的是如果每台电脑的操作系统都一样的话，那么一荣俱荣一损俱损。但如果只有一台电脑染上病毒，其他电脑如果系统不一样不会有问题，但是这台电脑自然不能幸免了。

albert

同样mike.

15题我是用排除法做的。。对于SUPPORT题，经常扯到一些和原文看起来无关的话题。。一不小心就错。。所以我一般用排除法，比较后选出。。但速度很慢。不知道各位有什么好办法？
16 后半部分,原文提到的：unauthorized access to all the computers at the same time could be virtually eliminated

siebel

以下是引用mike1999在2003-5-20 10:16:00的发言：
15题是加强题，选项B从成本的角度说明了对电脑系统作变动在经济上的可行性。所以可选。加强题不一定适用无关排除。
16题。本文说的是如果每台电脑的操作系统都一样的话，那么一荣俱荣一损俱损。但如果只有一台电脑染上病毒，其他电脑如果系统不一样不会有问题，但是这台电脑自然不能幸免了。

谢谢mike和albert! sorry, 欧还是不太明白：

15 跟原文毫无关系的内容可以加强么？经济上的可行性？那如果这个选项改成：政策上的可能性、能源上的可能性、文化上的可能性，是否还可以作为加强答案呢？

16 (C) If a business introduces variety into its linked computer operating systems, it will have increased overall protection for its systems, but will not have protected every computer from viral invasion. 如果采纳variety,公司将增强总体的保护；但是，不能保护每一台电脑。应该说的不是“某一台”8。
“unauthorized access to all the computers at the same time could be virtually eliminated”说的不是：所有电脑都可以受到保护么？怎么推出will not have protected every computer from viral invasion这个“又不保护每一台电脑呢？”

谢谢！

mike1999

以下是引用siebel在2003-5-20 12:19:00的发言：

谢谢mike和albert! sorry, 欧还是不太明白：

15 跟原文毫无关系的内容可以加强么？经济上的可行性？那如果这个选项改成：政策上的可能性、能源上的可能性、文化上的可能性，是否还可以作为加强答案呢？

16 (C) If a business introduces variety into its linked computer operating systems, it will have increased overall protection for its systems, but will not have protected every computer from viral invasion. 如果采纳variety,公司将增强总体的保护；但是，不能保护每一台电脑。应该说的不是“某一台”8。
“unauthorized access to all the computers at the same time could be virtually eliminated”说的不是：所有电脑都可以受到保护么？怎么推出will not have protected every computer from viral invasion这个“又不保护每一台电脑呢？”

谢谢！

15 政策上的可能性、能源上的可能性、文化上的可能性，都可以作为加强答案
unauthorized access to all the computers at the same time could be virtually eliminated”说的是：同时侵范所有电脑的可能性不存在了，不是说所有电脑都不存在被侵犯的可能性

siebel

多谢mike！

15 题已经清楚，谢谢！
16 不好意思：“同时侵范所有电脑的可能性不存在了，不是说所有电脑都不存在被侵犯的可能性。”说的好！但是这和答案中的but will not have protected every computer from viral invasion. 的关系欧还是不太明白。原题是infer题，答案应该是原文可以推出的内容。原文没有说是否保护每一台的电脑。最多提到"invade所有电脑的可能性不存在",但也不能就因此推出"不是所有的电脑都不存在被侵犯的可能性”吧。

谢谢！

albert

原文的论证过程如下：
同样版本电脑，一有病毒，就全都毁了。

albert

原文的论证过程如下：
同样版本电脑，一有病毒，就全都毁了。howerver,
If such a business introduced minor variations into its operating system software, unauthorized access to all the computers at the same time could be virtually eliminated.
言下之意:不同版本电脑，有了病毒，不会毁全部电脑，但是还可能毁一部分电脑。

C中 but will not have protected every computer from viral invasion. 说的是不能保护全部，和上面不正好一样吗。

所以重要的是上下全文来理解，切断全文的论证过程，但看一个句子，很容易误解。

siebel

谢谢ALBERT和MIKE！至此全部搞清楚了！非常感谢！

改天饮茶？

albert

你请客？