[求助]GWD30-38的答案是什么？

yzhao26

up

路吉儿

jackieli007

~~

jupiter410

up

苏27

我觉得题干说了一大堆都没有说这个抗生素和T病的关系啊。。。假设应该架个桥梁，就是说这个抗生素对T病是有抑制作用的，怎么不选B啊啊啊啊。。。。

张疆

强烈认同”苏27“
识别出“tetracycline”是抗生素而非致病菌，此题就解决了。哈哈

pengtiansh

不知道antibiotic的意思害死人啊 看得糊里糊涂的
mark一下

maple1258

为什么不选B呢，文中并没有指出typhus 与 tetracycline的关系啊，而B说了tetracycline只对typhus 有效，那不是一个很好的前提吗

Feelalive

A，排除他因

寂静岭的九尾狐

(B) is definitely the correct answer.

An assumption is something that the author is taking for granted as being true. In other words, an assumption is a missing but necessary link between the evidence and the conclusion.

Therefore, the correct answer to an assumption question is something that MUST BE TRUE in order for the argument to make sense.

To summarize the argument:

Evidence:

Nubians don't seem to have had typhus; and
The grain that Nubians used in their bread contains an antibiotic.

Conclusion:

The antibiotic is responsible for the lack of Typhus.

Let's look at (B):

"Tetracycline is not rendered ineffective as an antibiotic by exposure to the processes involved in making bread and beer."

Does this have to be true for the conclusion to make sense? Definitely!

A great way to check answer choices for assumption/strengthening/weakening questions is to use Kaplan's denial test. We look at the opposite of a choice and see what impact it has on the argument.

In this case, let's consider how persuasive the conclusion would be if (B) were NOT true:

"Tetracycline IS rendered ineffective as an antibiotic by exposure to the processes involved in making bread and beer."

Well, if the brewing/baking process renders Tetracycline ineffective, then how could it possibly have been keeping the Nubians typhus-free?

Since the denial of (B) renders the argument nonsensical, (B) itself must be true for the argument to make sense.

_________________
Stuart Kovinsky, B.A. LL.B.
Kaplan Test Prep & Admissions
Toronto Office
1-800-KAP-TEST
www.kaptest.com