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12版OG，25页第34题。
34. Of the companies surveyed about the skills they required in prospective employees, 20 percent required both computer skills and writing skills. What percent of the companies surveryed requried neither computer skills nor woring skills?
(1) Of those companies surveyed that required computer skills, half required writing skills.
(2) 45 percent of the companies surveyed required writing skills but not computer skills.
我看了参考答案，没琢磨清楚。。。哎
(1) Of those companies surveyed that required computer skills, half required writing skills.
这句的意思是：“要求员工掌握电脑技能的公司里，有一半要求写作技能。”吗？
为什么说requiring computer skills but not requiring writing skills 也是20%呢？ |
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发表于 2012-1-17 10:38:31
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