On job 复习日记-欢迎在职的战友们跟贴

GMAT_onjob

OG 12 99. Which of the following most logically completes the argument?
The irradiation of food kills bacteria and thus retards spoilage. However, it also lowers the nutritional value of
many foods. For example, irradiation destroys a signifi cant percentage of whatever vitamin B1 a food may
contain. Proponents of irradiation point out that irradiation is no worse in this respect than cooking. However, this
fact is either beside the point, since much irradiated food is eaten raw, or else misleading, since .
(A) many of the proponents of irradiation are food distributors who gain from foods’ having a longer shelf life
(B) it is clear that killing bacteria that may be present on food is not the only effect that irradiation has
(C) cooking is usually the fi nal step in preparing food for consumption, whereas irradiation serves to ensure a
longer shelf life for perishable foods
(D) certain kinds of cooking are, in fact, even more destructive of vitamin B1 than carefully controlled
irradiation is
(E) for food that is both irradiated and cooked, the reduction of vitamin B1 associated with either process
individually is compounded

GMAT_onjob

大家什么思路 ？

Kev718

跟一个，准备四战了，快成战神了。呵呵

无盐

LZ 说的有理！！！ 在职，今天开始准备了 给自己一个月的时间看能复习个什么样子

申请加入哈 yining1949(A) hotmail.com 

大家相互督促 就像LZ说的真的不容易！

Kev718

以下是引用GMAT_onjob在2009/8/26 16:52:00的发言：
OG 12 99. Which of the following most logically completes the argument?
The irradiation of food kills bacteria and thus retards spoilage. However, it also lowers the nutritional value of
many foods. For example, irradiation destroys a signifi cant percentage of whatever vitamin B1 a food may
contain. Proponents of irradiation point out that irradiation is no worse in this respect than cooking. However, this
fact is either beside the point, since much irradiated food is eaten raw, or else misleading, since .
(A) many of the proponents of irradiation are food distributors who gain from foods’ having a longer shelf life
(B) it is clear that killing bacteria that may be present on food is not the only effect that irradiation has
(C) cooking is usually the fi nal step in preparing food for consumption, whereas irradiation serves to ensure a
longer shelf life for perishable foods
(D) certain kinds of cooking are, in fact, even more destructive of vitamin B1 than carefully controlled
irradiation is
(E) for food that is both irradiated and cooked, the reduction of vitamin B1 associated with either process
individually is compounded

开始选错了。应该选E。og解释。

situation 辐射杀死细菌但却降低了营养物质-如b1. 支持者想通过提出烹饪也会破坏b1含量，来打消对于辐射的顾虑。但这其实是误导。

因为， 要说支持者的论点是个误导，就要说出一些辐射食物的错。支持者说辐射杀死的b1并不比烹饪多，就暗示可以被烹饪的食物也可以被辐射，因为两种情况都会使得食物含有相同的b1. 但如果辐射和烹饪同时作用破坏的b1要比两种方法单独破坏的b1多，那么支持者的就构成了误导。

[此贴子已经被作者于2009/8/26 18:27:10编辑过]

GMAT_onjob

谢谢解释

一般我们都是从答案去想why，但是我特别想锻炼那种怎么样能够直接可以选出最后答案，或者说排除其他错误答案的思维，就是how的过程

GMAT_onjob

再来一道，找到一个很好的解释，记录一下

The spacing of the four holes on a fragment of a bone flute excavated at a Neanderthal campsite is just what is required to play the third through sixth notes of the diatonic scale-the seven-note musical scale used in much of Western music since the Renaissance. Musicologists therefore hypothesize that the diatonic musical scale was developed and used thousands of years before it was adopted by Western musicians.

Which of the following, if true, most strongly supports the hypothesis?

A. Bone flutes were probably the only musical instrument made by Neanderthals.
B. No musical instrument that is known to have used a diatomic scale is of an earlier date than the flute found at the Neanderthal campsite.
C. The flute was made from a cave-bear bone and the campsite at which the flute fragment was excavated was in a cave that also contained skeletal remains of cave bears.
D. Flutes are the simplest wind instrument that can be constructed to allow playing a diatonic scale.
E. The cave-bear leg bone used to make the Neanderthal flute would have been long enough to make a flute capable of playing a complete diatonic scale.

GMAT_onjob

We can summarize the argument as follows:

Flute fragment found with 4 notes of the diatonic scale. Therefore, creators of flute knew about and used the diatonic scale.

In order to reach that conclusion, the author has to assume that the 4 notes on the fragment aren't just coincidentally on the diatonic scale.

Our prediction for a strengthener: some actual evidence that it's not just a coincidence OR something that allows us to extrapolate more info from the 4 notes on the fragment.

Only choice (e) gives us useful information. If we know that the flute could have contained the entire scale, that's more evidence that the creators knew about and used the scale.

This is a great situation to use Kaplan's denial test. Let's look at the opposite of (e):

Quote:

It is NOT true that the cave-bear leg bone used to make the Neanderthal flute would have been long enough to make a flute capable of playing a complete diatonic scale.

Well, if the flute couldn't have been long enough to encompass the entire scale, then we're very skeptical that the neanderthals were actually using the scale. In other words, the opposite of (e) casts doubt on the conclusion: therefore, (e) itself must be a strengthener.

It's important to remember that strengthening isn't the same as proving. (E) certainly doesn't prove that neanderthals used the scale, it just makes that conclusion more believable.

yukiko

跟个贴，去年考过，不过比预期的分数差很多，但是去年认真复习的时间一共一个月都不到，之后总是下不了决心，现在又开始在职考，还没报名，打算9月底10月初考，共勉，如果建了群的麻烦哪位发个群号，谢谢！

GMAT_onjob

In Swartkans territory, archaeologists discovered charred bone fragments dating back one million years.
Analysis of the fragments, which came from a variety of animals, showed that they had been heated to
temperatures no higher than those produced in experimental campfires made from branches of white
stinkwood, the most common tree around Swartkans.
Which of the following, if true, would, together with the information above, provide the best basis for the claim
that the charred bone fragments are evidence of the use of fire by early hominids?
(A) The white stinkwood tree is used for building material by the present-day inhabitants of Swartkans.
(B) Forest fires can heat wood to a range of temperatures that occur in campfires.
(C) The bone fragments were fitted together by the archaeologists to form the complete skeletons of
several animals.
(D) Apart from the Swartkans discovery, there is reliable evidence that early hominids used fire as many as
500,000 years ago.
(E) The bone fragments were found in several distinct layers of limestone that contained primitive cutting
tools known to have been used by early hominids.

大家是什么解题思路，不是那种从答案推回来的哈，希望能讲讲how