这次没贴错，nn请进：gwd-4-14

prfdu2005

    

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.

    

 

    

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.
2. Hotels built since 1930 can generally accommodate more guests
        than those built before 1930.
3. The materials available to carpenters working before 1930 were
        not significantly different in quality from the materials available to
        carpenters working after 1930.
4. The better the quality of original carpentry in a building, the
        less likely that building is to fall into disuse and be demolished. 
   
               
5. The average length of apprenticeship for carpenters has
        declined significantly since 1930.答案是d，可我怎么觉得是加强或无关呢？大家怎么看？