Compared with the first annul poll conducted by the National Sleep Foundation, 2005 saw a ______ percent increase in the number

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问题 Compared with the first annul poll conducted by the National Sleep Foundation, 2005 saw a ______ percent increase in the number of Americans experiencing sleeping problems.
  
According to an annual poll conducted by the National Sleep Foundation, in 2005, 75 percent of Americans experienced sleeping problems ranging from minor and transient to severe and chronic. That’s up from 62 percent in 1999, when the NSF first conducted its poll. The number of Americans turning to prescription sleep aids for help has gone up even more dramatically: nearly 60 percent over the past five years. American pharmacists filled about 42 million sleeping pill prescriptions last year, and most of them were for either Ambien or Lunesta, two recent additions to the sleep aid market. These drugs are not believed to be habit-forming, and they don’t seem to have the same liver-damaging side-effects that earlier sleep aids had. For that reason, Russell Rosenberg says they can be a good option for a particular kind of patient. "For something we would consider very short-term, or even transient. That is, let’s say someone had a very serious event in their life, death of a loved one or something. In the short-run, I think most physicians are going to realize this person just needs a few tablets here and there to get them through the stress of the situation."

选项 A、Two recent additions to the sleep aid market are not believed to be habit-forming.
B、The earlier sleep aids had liver-damaging side-effects.
C、The number of Americans turning to sleep aids for help has gone up nearly 16 percent over the past five years.
D、American pharmacists filled about 42 million sleeping pill prescriptions last year.

答案C

解析 细节题。文中提到:美国寻求开睡眠药的人的数量惊人地上升,在过去的5年里增加了将近60%而非16%。故选项C为符合题目要求的选项。应特别注意区分以-ty和-teen结尾的数字。同时,应注意题目中关键词NOT。
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