15. Which one of the following best expresses the author's conclusion in the passage?

　(A) Science is considerably less valuable than other approaches to producing knowledge.
　(B) Changes in and differences among scientific theories do not result in genuine progress.
　(C) Scientists should develop more accurate approaches to recording and explaining observations about nature.
　(D) The ability of science to produce knowledge is overrated.
　(E) Currently accepted scientific theories, however well accepted, are probably self-contradictory
　
　16. Which one of the following claims is central to the author's argument?
　
　(A) Alternative explanations are possible for any set of observations about nature.
　(B) Science has made substantial progress in the ability to predict natural events.
　(C) Science has developed so many theories that it is impossible to know which ones to believe.
　(D) It is important that scientists distinguish between prediction and explanation.
　(E) The judgment of scientists as to which theories to accept is suspect, as they tend to follow the latest scientific fashion.
　
　17. The recent dramatic increase in commuter airline crashes is caused in large part by pilot inexperience. As a major growth industry, the commuter airlines have recently had a great increase in the demand for experienced pilots. It is impossible to define and assess pilot experience, however. For example, someone with 1000 hours of flight experience as an instructor in Arizona, where the weather is good,cannot be compared to someone with 1000 hours' experience as a night cargo pilot in the stormy northeastern United States.

　The author's conclusion that the dramatic increase in commuter airline crashes is caused by pilot inexperience is most weakened by the fact that the author has

　(A) argued that it is impossible to measure "pilot experience"
　(B) used an example that does not relate logically to the point being illustrated
　(C) provided only a partial explanation for the increase in commuter airline crashes
　(D) made an unfair comparison between experience as a flight instructor and experience as a night cargo pilot
　(E) not specified how much of the recent increase in commuter airline crashes is due to pilot inexperience
　
　18. Brand X laundry detergent sells for $2.00 a box Brand Y sells for $4.00 a box. Therefore, you will save money if you use Brand X laundry detergent instead of Brand X.

　Which one of the following if true would make the conclusion in the passage a logical conclusion?

　(A) It takes only one cup of Brand X to do the work of one and one-half cups of Brand Y.
　(B) A box of Brand X contains the same amount of inaundry detergent as a box of Brand Y.
　(C) A box of Brand X will clean just as many loads of laundry as a box of Brand Y.
　(D) More than twice as many people use Brand X as use Brand Y.
　(E) Brand X and Brand Y normally sell for $3.00 a box, but Brand X is one safe and Brand Y has been marked up.
　
　19. In a recent advertisement, a major cereal company contended that the better educated people are the more likely it is that as children they regularly ate oatmeal. As evidence, the company cited a national random survey of college graduates in which four-fifths of all those surveyed reported having eaten oatmeal at least once a week when they were young.
　　
　Which one of the following is an additional piece of information that would support the cereal company's conclusion?
　
　(A) Four-fifths of all current college graduates eat oatmeal regularly.

共8页: 上一页 [1] [2] [3] [4] 5 [6] [7] [8] 下一页