『求助』OG-11-166

166. Last year the rate of inflation was 1.2 percent, but for the current
year it has been 4 percent. We can conclude that inflation is on an upward
trend and the rate will be still higher next year.

Which of the following, if true, most seriously weakens the conclusion
above?

(A) The inflation figures were computed on the basis of a representative
sample of economic data rather than all of the available data.

(B) Last year a dip in oil prices brought inflation temporarily below its recent
stable annual level of 4 percent.

(C) Increases in the pay of some workers are tied to the level of
inflation, and at an inflation rate of 4 percent or above, these pay raises
constitute a force causing further inflation.

(D) The 1.2 percent rate of inflation last year represented a ten-year
low.
            B

(E) Government intervention cannot affect the rate of inflation to any
significant degree.
            

仔细看OG解释

两个时间点的数字并不能对一个趋势下结论

B选项说明了去年发生的偶然时间导致油价偏离(下降)了它的平均水平