In 1975,35 percent of state W's work force was employed in manufacturing jobs. That percentage dropped in each following year until in 1982 it reached 25 percent. If the statements above are ture, all of the following statements about changes in W's work force between 1975 and 1982 could also be true EXCEPT. (A) The number of people in the work force increased, while the number of people employed in manufacturing jobs decreased. (B) The number of people in the work force decreased, while the number of people employed in manufacturing jobs increased. (C) Both number of people in the work force and the number of people employed in manufacturing jobs increased. (D) Both number of people in the work force and the number of people employed in manufacturing jobs decreased. (E) The number of people in the work force remained constant, while the number of people employed in manufacturing jobs decreased. 答案是(E) ...可是我選(B)??? 設ratio= manufacturing jobs/W's work force , 因為到後來比率下降~所以 要找出true EXCEPT~ 分子要越大,分母為越小才是答案~ (B)分子越大/分母越小 (E)分子越小/分母常數不變~ 想不出來>< --

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