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  3. Something in chocolate could be used to stop coughs and lead to more effective medicines, say UK researchers. Their study fo

Something in chocolate could be used to stop coughs and lead to more effective medicines, say UK researchers. Their study fo

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问题     Something in chocolate could be used to stop coughs and lead to more effective medicines, say UK researchers.
    Their study found that theobromine, found in cocoa, was nearly a third more effective in stopping coughs than codeine, which was considered the best cough medicine at present.
    The Imperial College London researchers who published their results online said the discovery could lead to more effective cough treatment. "While coughing is not necessarily harmful(有害的)it can have a major effect on the quality of life, and this discovery could be a huge step forward in treating this problem," said Professor Peter Barnes.
    Ten healthy volunteers(志愿者)were given theobromine, codeine or placebo, a pill that contains no medicine, during the experiment. Neither the volunteers nor the researchers knew who received which pill. The researchers then measured levels of capsaicin, which is used in research to cause coughing and as a sign of how well the medicine are stopping coughs.
    The team found that, when the volunteers were given theobromine, the capsaicin need to produce a cough was around a third higher than in the placebo group. When they were given codeine they need only slightly higher levels of capsaicin to cause a cough compared with the placebo.
    The researchers said that theobromine worked by keeping down a nerve activity(神经活动), which cause coughing. They also found that unlike some standard cough treatments, theobromine caused no side effects such as sleepiness.
According to Professor Barnes, theobromine______.
选项 A、cannot be as effective as codeine
B、can be harmful to people’s health
C、cannot be separated from chocolate
D、can be a more effective cure for coughs
答案D
解析 推理判断题。从第二段的Their study found that theobromine，found in cocoa，was nearlya third more effective in stopping coughs than codeine，which was considered the best cough medi—cine at present．可看出theobromine比codeine更有效，判断A项错误。既然它用来止咳，改善人们的生活质量，所以B项错误。在第一段提到了theobromine是从chocolate里提炼出来的，所以C项错误。故正确答案是D项。
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