标题: OG11cr-41 [打印本页] 作者: vincent815 时间: 2010-7-9 23:42 标题: OG11cr-41 Since the mayor’s publicity campaign for Greenville’s bus service began six months ago, morning automobile traffic into the midtown area of the city has decreased seven percent. During the same period, there has been an equivalent rise in the number of persons riding buses into the midtown area. Obviously, the mayor’s publicity campaign has convinced many people to leave their cars at home and ride the bus to work.
Which of the following, if true, casts the most serious doubt on the conclusion drawn above? A. Fares for all bus routes in Greenville have risen an average of five percent during the past six months. B. The mayor of Greenville rides the bus to City Hall in the city’s midtown area. C. Road reconstruction has greatly reduced the number of lanes available to commuters in major streets leading to the midtown area during the past six months. D. The number of buses entering the midtown area of Greenville during the morning hours is exactly the same now as it was one year ago. E. Surveys show that longtime bus riders are no more satisfied with the Greenville bus service than they were before the mayor’s publicity campaign began. 答案是C，我在CD间犹豫，最终我选了D，请问D为啥错了，感谢回复作者: jasson52 时间: 2012-1-14 15:12
严格按照古典经济学思路来看 所有商品的价格都会一样不会有higher price 的存在作者: HarrisZheng 时间: 2012-1-14 21:01
D 是无关的 车班次数没有增加并不能说明乘车的人数没有增加