81.When demand for a factory’s products is high, more money is spent at the factory for safety precautions and machinery maintenance than when demand is low. Thus the average number of on-the-job accidents per employee each month should be lower during periods when demand is high than when demand is low and less money is available for safety precautions and machinery maintenance.
Which of the following, if true about a factory when demand for its products is high, casts the most serious doubt on the conclusion drawn above?
A.Its employees ask for higher wages than they do at other times.
B.It s management hires new workers but lacks the time to train them properly.
C.Its employees are less likely to lose their jobs than they are at other times.
D.Its management sponsors a monthly safety award for each division in the factory.
E.Its old machinery is replaced with moderns, automated models.
答案是b。我明白选b的理由，但是对题目有点疑惑。如果没理解错的话，原文的意思应该是“当产品需求高的时候，对预防措施和机器维护会比产品需求低时投入更多。因此，工伤事件在产品需求高时会比产品需求低时要更少，同时预防措施和机器维护的资金也会少。”开头就说“对预防措施和机器维护资金投入就多”为什么最后又说“less money is available for safety precautions and machinery maintenance.”呢？
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