the number of televisions sold annually in Borodia has not changed. 电视机数量没变
recent statistics show a droip in the number of television assemblers in Borodia. 工人少了
结论: the number of televisions Borodia imports annually from Vernland has increased. 电视机进口增加了
问假设
C The average number of hours it takes a Borodian television assembler to assemble a television has not decreased significantly during the past three years. 工人生产电视机的时间没有减少.
题目中已经说了工人减少了, 如果生产效率没有提高的话, 那么生产的数量就减少. 而总量不变, 所以才可以推出结论是进口增加
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