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题库 / OG12-CR-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?
Its employees ask for higher wages than they do at other times.
Its management hires new workers but lacks the time to train them properly.
Its employees are less likely to lose their jobs than they are at other times.
Its management sponsors a monthly safety award for each division in the factory.
Its old machinery is replaced with modern, automated models.
E说新机器替代旧机器，但是不知道新机器需要花多少钱，有可能还花的更多，所以不能说明剩下的钱会变多。
B雇了没训练好的新员工，所以accidents per employee不会因为花钱多了就lower， 削弱结论
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