请教LSAT－6－II－7,10，17

joywzy

10. All of John's friends say they know someone who has smoked 40 cigarettes a day for the past 40 years and yet who is really fit and well. John does not know anyone like that and it is quite certain that he is not unique among his friends in this respect.

If the statements in the passage are true, then which one of the following must also be true?

(A) Smoking often lie about how much they smoke.

(B) People often knowingly exaggerate without intending to lie.

(C) All John's friends know the same lifelong heavy smoker.

(D) Most of John's friends are not telling the truth.

(E) Some of John's friends are not telling the truth.

答案：E

我不明白这是怎么来的。在归纳题中，不能有原文没有的概念，但E中不是出现了telling the truth, 这一原文没有的概念了吗？

High-technology medicine is driving up the nation's health care costs. Recent advances in cataract surgery illustrate why this is occurring. Cataracts are a major cause of blindness, especially in elderly people. Ten years ago, cataract surgery was painful and not always effective. Thanks to the new technology used in cataract surgery, the operation now restores vision dramatically and is less expensive. These two factors have caused the number of cataract operations performed to increase greatly, which has, in turn, drive up the total amount spent on cataract surgery.

7. Each of the following, if true, would support a challenge to the author's explanation of the increase in the number of cataract operations EXCEPT:

(A) The overall population of the nation has increased from what it was ten years ago

(B) Any one individual's chance of developing cataracts is greater than it was ten years ago.

(C) The number of older people has increased during the last ten years.

(D) Today, health insurance covers cataract surgery for more people than it did ten years ago.

(E) People who have had unsuccessful cataract surgery are left with more seriously impaired vision than they had before the surgery.

答案：E，我认为E也是削弱，也是提出了他因来削弱啊。

17. From a book review: The authors blithely claim that there are "three basic ways to store energy: as heat, as electricity or as kinetic energy" However, I can not call to mind any affective ways to store energy as electricity, whereas any capable student of physics could readily suggest a few more ways to store energy : chemical , gravitational, nuclear

The reviewer makes which one of the following criticisms of a claim that appears in the book under review?

(A) There is no reason to consider any particular way to store energy any more basic than any other

(B) The list given of ways to store energy is possibly inaccurate and certainly not exhaustive

(C) It is overly limiting to treat basic ways to store energy as a question unrelated to the question of effective ways to use energy

(D) What needs to be considered is not whether various ways to store energy are basic but whether they are effective

(E) Except possibly for electricity all ways to store energy are equally effective and therefore equally basic

答案：B，我选了D，另外想问C是什么意思。

谢谢。

[此贴子已经被作者于2003-5-24 10:20:46编辑过]

albert

10 纯粹的逻辑题：
JOHN并不知道有这样的朋友：大烟枪---一天40根，40年。。
同时JOHN知道至少在他朋友中，他不是唯一这样子的(not unique)。。说明他的朋友也有人不认识这样的烟鬼。。而开头又说ALL OF his friends says that 他们认识这样的烟鬼。
那肯定是E：至少有朋友撒谎了。

albert

2。原文是提出现象： 手术人增加
解释原因： 恢复快和费用便宜
E不能解释手术人增加。。。因为病更重了和手术人增加是两回事。。

albert

3 A说有三种方式存能量
作者嘲笑： 我不知道有用电存能量，但是有本事的学生知道有更多方式存能量，又举了一堆别的方式。。。

(B) The list given of ways to store energy is possibly inaccurate and certainly not exhaustive
正象B说的，作者认为A说的可能不对，即使对也不完整。

(C) It is overly limiting to treat basic ways to store energy as a question unrelated to the question of effective ways to use energy
“认为A和B两个问题是不相干的”这种看法很肤浅
A问题是：存储能量的基本方式
B问题是： 使用能量的有效方式

joywzy

albert, thank u for your kind help.

In T 10, I understand what u mean. But , why the answer is E, not D? Is anything different between most and some?

In T7, i got it . E is out of scope, as mindfree always mentioned.

In T 17, I cannot clear out the choice , in particular, in choice of a, c and D. could u please explain in greater detail?

Thank u .

albert

T10, some means "at least one", most means "a large percent of".. surely you can only know "at least one" of his friends is lying... but you can't know the percent of his friends who are lying.

T17, you should notice what is the question.. the question is:

The reviewer makes which one of the following criticisms of a claim that appears in the book under review?
translate into Chinese, it means: "作者的批驳是啥意思？"

注意：不要加入不应该的比较和额外信息。。原文唯一的比较是：
a few more ways....
从这里可以可以看出：作者的意思和B一样：作者认为A说的可能不对，即使对也不完整。

A: 原文根本没有BASIC的比较。。。排除

C：(C) It is overly limiting to treat basic ways to store energy as a question unrelated to the question of effective ways to use energy
原文根本没有考虑到两个问题是否相干，只是说有更多方式。。

D (D) What needs to be considered is not whether various ways to store energy are basic but whether they are effective
原文根本没有什么应该考虑，什么不应该考虑。。没有这种比较。。排除。。