C、A公司卖房子比F公司快,并不一定说明A公司的销售能力就要比F公司好,因为两间房子并不是一样的,可能一间房子好一些,而另一间相对要差一些,地理位置因素,房屋结构,新旧等。
D、即使说明A公司的销售能力比F公司好,那也是十年前的F公司和去年的A公司,都不能够代表现在的两家公司。因为随着时间变化,两家公司都可能会产生很大的变化。即使现在A公司仍然要比F公司的销售能力好,那也只能说明销售作者的那两套房子上的能力不同,并不一定能够代表两家公司其他方面的销售能力。
5.The following appeared in the business section of a newspaper.
Given that the number of people in our country with some form of arthritis is expected to rise from 40 million to 60 million over the next twenty years, pharmaceutical companies that produce drugs for the treatment of arthritis should be very profitable. Many analysts believe that in ten years Becton Pharmaceuticals, which makes Xenon, the best-selling drug treatment for arthritis, will be the most profitable pharmaceutical company. But the patent on Xenon expires in three years, and other companies will then be able to produce a cheaper version of the drug. Thus, it is more likely that in ten years the most profitable pharmaceutical company will be Perkins Pharmaceuticals, maker of a new drug called Xylan, which clinical studies show is preferred over Xenon by seven out of ten patients suffering from the most extreme cases of arthritis.
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