高三的英语阅读理解
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 levers 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 cause coughing. They also found that unlike some standard cough treatments, theobromine caused no side effects such as sleepiness.
1. According to Professor Barnes, theobromine ______.
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
2. What was used in the experiment to cause coughing?
A. Theobromine. B. Codeine. C. Capsaicin. D. Placebo.
3. We learn from the text that volunteers in the experiment _____.
A. were patients with bad coughs
B. were divided into the three groups
C. received standard treatments
D. suffered little side effects
4. Which of the following would be the best title for the text?
A. Codeine: A New Medicine B. Chocolate May Cure Coughs
C. Cough Treatment: A Hard Case D. Theobromine Can Cause Coughs
>>>>>>参考答案<<<<<<
第一篇：
1. D 根据前文one third of the U.S. families have no Internet access and do not plan to get it 可知
2. B 由第二段……found the main reason potential customers say they do not subscribe to the Internet is because of the low value to their daily lives they recognize……可知
3. A 从最后一段第一句可知
4. B 由最后一段“Entertainment applications will be the key”一句可知
5. C 从文章的写作逻辑可知作者主要在谈目前还有三分之一的美国家庭没有网络服务，而B答案太宽泛
第二篇：
这是一篇科普性读物。选材于医学的某一方面的'研究――对巧克力中theobromine(可可碱)独特的治疗咳嗽的功效的对比研究，证明theobromine(可可碱)是未来有效的治疗咳嗽的良药。
1 D。推理判断题。从第二段的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. 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heobromine是从chocolate里提炼出来的，所以C项错误。故正确答案是D项。
2 C。细节理解题。A、B、D三项中的物品是用来做实验的物品。在文章第四段最后一句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. 可知Capsaicin(辣椒素)用来引起咳嗽和作为这些药物如何止咳的依据。
3 B。推理判断题。从第四段首句Ten healthy volunteers(志愿者) were given theobromine, codeine or placebo, a pill that contains no medicine, during the experiment. 可知实验中每组人吃一种所给的物品才能看出止咳的效果，故需要三组志愿者。
4 B。归纳主旨题。本文主要介绍chocolate中含有的一种成分Theobromine能有很好的止咳效果，所以该题的正确答案为B
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