下周就要考了，帮忙看看天山几题

18.      The growing popularity of computer-based activities was widely expected to result in a
decline in television viewing, since it had been assumed that people lack sufficient free
time to maintain current television-viewing levels while spending increasing amounts of
free time on the computer.  That assumption, however, is evidently false:  in a recent mail
survey concerning media use, a very large majority of respondents who report increasing
time spent per week using computers report no charge in time spent watching television.
                                                                       
Which of the following would it be most useful to determine in order to evaluate the
argument?                                                              
                                                                       
    A. Whether a large majority of the survey respondents reported watching television
        regularly                                                      
    B. Whether the amount of time spent watching television is declining among people
        who report that they rarely or never use computers            
    C. Whether the type of television programs a person watches tends to change as the
        amount of time spent per week using computers increases        
    D. Whether a large majority of the computer owners in the survey reported spending
        increasing amounts of time per week using computers            
    E. Whether the survey respondents?reports of time spent using computers included
        time spent using computers at work                        
正确答案是E，我的答案是D

19:      In Kravonia, the average salary for jobs requiring a college degree has always been
higher than the average salary for jobs that do not require a degree.  Current enrollments
in Kravonia`s colleges indicate that over the next four years the percentage of the
Kravonian workforce with college degrees will increase dramatically.  Therefore, the
average salary for all workers in Kravonia is likely to increase over the next four years.  
                                                                       
Which of the following is an assumption on which the argument depends?
                                                                       
    A. Kravonians with more than one college degree earn more, on average, than do
        Kravonians with only one college degree.                       
    B. The percentage of Kravonians who attend college in order to earn higher salaries
        is higher now than it was several years ago.                  
    C. The higher average salary for jobs requiring a college degree is not due largely to
        a scarcity among the Kravonian workforce of people with a college degree.
    D. The average salary in Kravonia for jobs that do not require a college degree will
        not increase over the next four years.                        
    E. Few members of the Kravonian workforce earned their degrees in other countries.

正确答案是C，我的答案是D

30:The percentage of households with an annual income of more than $40,000 is higher in
Merton county than in any other county.  However, the percentage of households with an
annual income of $60,000 or more is highest in Sommer county.         
                                                                       
If the statements above are true, which of the following can properly be concluded on the
basis of them?                                                         
                                                                       
    A. No household in Merton county has an annual income of $60,000 or more.
    B. Some households in Merton county have an annual income between $40,000 and
        $60,000.   

    C. The number of households with an annual income of more than $40,000 is greater
        in Merton than in Sommer county.                              
    D. Average annual household income is higher in Sommer than in Merton county.
    E. The percentage of households with an annual income of $80,000 is higher in
        Sommer than in Merton county.                                

正确答案是B，我的答案是E