强烈请教GWD-4-14（XY-3-2）！！-->carolhide转移

GWD-4-14（XY-3-2）

Guidebook writer:  I have visited hotels throughout the country and have noticed that in those built before 1930 the quality of the original carpentry work is generally superior to that in hotels built afterward.  Clearly carpenters working on hotels before 1930 typically worked with more skill, care, and effort than carpenters who have worked on hotels built subsequently.

SITUATION：作者去了许多HOTEL，发现BEFORE 1930的木工活比后来的好，认为这是木工在BEFORE 1930工作的比AFTER 1930的技艺更高、更用心对待工作。

Which of the following, if true, most seriously weakens the guidebook writer’s argument?

1. The quality of original carpentry in hotels is generally far superior to the quality of original carpentry in other structures, such as houses and stores.（无关）

2. Hotels built since 1930 can generally accommodate more guests than those built before 1930.（说SINCE1930的优点）

3. The materials available to carpenters working before 1930 were not significantly different in quality from the materials available to carpenters working after 1930.（材料没什么不一样，那么就变向是说做工确实是BEFORE1930好）

4. The better the quality of original carpentry in a building, the less likely that building is to fall into disuse and be demolished. （无关）

5. The average length of apprenticeship for carpenters has declined significantly since 1930.
                       （支持原观点）

这道题目XY的答案给的是D，我想了好久都不明白，请NN们指点迷津啊~~~

文章的意思是

作者看了1930年造的房子－－－感觉当时的工匠造的好－－－就觉的1930年的工匠造的都是好的

问：weaken

D：好的都保留到现在，不好的都倒塌了，

作者看到的都是保留到现在的精华，大多数一般的，不好的房子，不是没有，而是已经不存在了而已。

因此其实整体水平也只是一般，只是保留到现在的都是好的。所以作者有了错觉。

D他因削弱

D：保留到现在的都是好的

意思是作者只看到了好的，就说那个时代的工匠都是好的，weanken

大体水平其实差不多，只是最好的保留到现在被作者看到而已。

由小及大的错误。