题目内容
Something in chocolate could be used to stop coughs and lead to more effective (有效的) 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 treatments. “While coughing is not necessarily（不一定） harmful it can have a major effect on the quality of life, and this discovery could be a great step forward in treating this problem,” said Professor Peter Barnes.
Ten healthy volunteers 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 medicines are stopping coughs.
The team found that, when the volunteers were given theobromine, the capsaicin needed to produce a cough was about a third higher than in the placebo group. When they were given codeine they needed only a little higher levels of capsaicin to cause a cough compared with the placebo.
The researchers said that theobromine worked by keeping down a verve activity(神经活动), which causes coughing. They also found that unlike some standard（正规的） cough treatments, theobromine caused no side effects such as sleepiness.
67. According to Professor Barnes, theobromine ______.
A. cannot be as effective as codeine
B. can be harmful to people’s health
C. cannot be taken out of chocolate
D. can be a more effective treatment for coughs
68. What was used in the experiment to cause coughing?
A. Theobromine. B. Codeine. C. Capsaicin. D. Placebo.
69. We learn from the text that volunteers in the experiment _____.
A. were patients with bad coughs B. were divided into three groups
C. received standard treatments D. suffered a few side effects
70. Which of the following would be the best title for the text?
A. Codeine: A New Medicine B. Chocolate May Stop Coughs
C. Cough Treatment: A Hard Problem D. Theobromine Can Cause Coughs
CCBB
