大家帮忙看两道题，其他板块都没人帮忙

yilin2288

40. GWD-23-Q14
                

Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year.  This year the plantings are being seriously damaged by bollworms.  Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide.  Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions.  So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms.

In evaluating the argument, which of the following would be most useful to establish?

1. Whether corn could be bioengineered to produce the insecticide

2. Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year

3. Whether other crops that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them

4. Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms

5. Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton

答案是B，但是我想不明白，我总觉得选C

31. GWD25-Q31

New items developed for automobiles in the 1997 model year included

a safer air bag , which, unlike previous air bags, eliminated the possibility

that a burst of smoke would appear when the bag inflated, and making an

already terrified passenger think the car was on fire.

A.     inflated, and making.

B.     Inflated, so that it could make.

C.     Inflated and made.

D.     Inflated and make.

E.      Inflated to make.

这个题答案选的是E，我觉得应该选D，大家说呢

还有一道数学

1.          45本书，其中要么是英文的，要么是西班牙文的；要么是平装的，要么是简装的。现在从中随机取出一本书，问抽出的是平装西班牙文书的概率是否大于1/2？
                    

         （1）有30本平装书
                    

         （2）有15本西班牙文书    B

不明白为什么选B，请高手指点

eleine

1.   45本书，其中要么是英文的，要么是西班牙文的；要么是平装的，要么是简装的。现在从中随机取出一本书，问抽出的是平装西班牙文书的概率是否大于1/2？
        

         （1）有30本平装书
            

         （2）有15本西班牙文书    B

试着解一下。

1 比较简单，从1开始，要概率大于1/2， 西班牙文的数量是关键。本数不同，概率可以小于或大于1/2。 你可以自己试试。

2。 设西班牙书有X本，C1,x *C1,2/45 >1/2 => x>45/4 ..so 2对

dina1102

回答楼主

逻辑题

C不对是因为第一句话已经告诉你知道今年基因改变过的corn还是有抗药性的。这道题的模型可以看成是这样的：虫子的damage/种的corn总数，由于基因改变过的corn还是有抗药性的（第一句话中的premise），第二句话排除它因，虫子not necessarily developing resistance to the cotton’s insecticide。第三句话more corn than usual was planted throughout cotton-growing regions，分母变大，并且没有说这个corn是不是基因改变过的；如果是基因改变过的corn，就不会有This year the plantings are being seriously damaged by bollworms（由文中前两句话推出）。对B的回答正好解释文章中的矛盾

语法题

我还是认为语法题再用关键点排除一部分选项后需要用语意才可以。解释如下：

a burst of smoke would appear when the bag inflated and make an

already terrified passenger think the car was on fire 如D中，make 的先行词是a burst

a burst of smoke would appear when the bag inflated to make an

already terrified passenger think the car was on fire 如E中，make短语作为a burst of smoke would appear when the bag inflated 的结果状语

比较一下，我觉得“一件事”比“一个东西”要好

个人看法，请大家指正

already terrified passenger think the car was on fire 如E中，make短语作为a burst of smoke would appear when the bag inflated 的结果状语

比较一下，我觉得“一件事”比“一个东西”要好

个人看法，请大家指正

katie83

以下是引用yilin2288在2006-9-16的发言：

40. GWD-23-Q14
    

Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year.  This year the plantings are being seriously damaged by bollworms.  Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide.  Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions.  So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms.

In evaluating the argument, which of the following would be most useful to establish?

1. Whether corn could be bioengineered to produce the insecticide

2. Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year

3. Whether other crops that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them

4. Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms

5. Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered cotton

答案是B，但是我想不明白，我总觉得选C

这里要注意排除无关选项，我们来分析一下逻辑线：

evidence：Plantings  produce its own insecticide against bollworms.This year the plantings are damaged by bollworms. Bollworms are not developing resistance to the cotton’s insecticide.  Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions.

conclusion:  the cotton is simply being overwhelmed by corn-bred bollworms.

从文中给的信息来看,讨论的无非是planting和虫子的关系, 而文中给的重要信息----planting能够自己产生杀虫剂却被结论忽略了,所以选项里面一定要排除这个因素,你选的C里面提到了other planting,是不是离题了呢?

31. GWD25-Q31

New items developed for automobiles in the 1997 model year included

a safer air bag , which, unlike previous air bags, eliminated the possibility

that a burst of smoke would appear when the bag inflated, and making an

already terrified passenger think the car was on fire.

A.     inflated, and making.

B.     Inflated, so that it could make.

C.     Inflated and made.

D.     Inflated and make.

E.      Inflated to make.

这个题答案选的是E，我觉得应该选D，大家说呢

这个题要以理解句意为基础, 首先排除掉A,D因为and前后不平行,B的it无从指代,然后看C,容易引起歧义,让人认为the bag inflated and made the passenger...所以选E。

yilin2288

逻辑题大家都讲得非常明白，感激不尽，

可语法题好像MM明白我问的什么但我觉得inflated to make 中，make更像是inflated 这个动作的结果状语，所以我还是觉得D的选项好一点。

汗一个，2楼MM数学题的解释俺没看懂啊，是不是因为2选项推出拿出西班牙书的概率肯定小于1/2所以就能充分回答题干中的问题了？