Can eating a chocolate bar every day really prevent age-related memory loss?No．But a new research shows that large amounts of flavones.substances found in cocoa.tea and some kinds of vegetables.may i 题目和参考答案——青夏教育精英家教网—

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20．Can eating a chocolate bar every day really prevent age-related memory loss？No．But a new research shows that large amounts of flavones，substances found in cocoa，tea and some kinds of vegetables，may improve age-related memory failure．
Dr．Scott Small is a professor of neurology at Columbia University  in new York City．He is the lead writer of a research paper describing the effects of cocoa flavones on brain activity  His study involved 37volunteers aged between 50and 69．Researchers gave them a high-level flavones drink made from cocoa beans or a low-level flavones drink．For a period of three months，some subjects got 900milligrams of flavones a day．The others got 10milligrams of flavones each day．Brain imaging and memory tests were given to each study subject before and after the study Dr．Small says that the subjects who had the high-level flavones drink showed much improvement on memorytests．
The researchers warn that more work is needed to be done because this study was performed  only on a small group．Dr．Joann Manson is the lead researcher of a four．year study involving 18，000adults．This study will use flavones capsules（胶囊） The study subjects will be divided into two groups and will take two pills per day．The capsules used will all Look the same．But one group's capsules will contain flavones，while the other group will take capsules made of an inactive substance，or placebo
Dr．Manson says it's not necessary for people to start eating more chocolate，because 3person would have to eat a huge amount of chocolate to get the same level of flavones given to the Lest subjects．He adds many manufacturers have planned to remove the flavones from their chocolate products．Similarity，Dr．says a cocoa-based flavones extract（提取）may be developed in the future But he says that more studies are needed to see how much flavones is good for our health．

32．What was done to the subjects alter Dr．Small's study？C
A．They were asked to take a high-level flavones drink
B  They were given capsules containing flavones
C  They were given brain imaging and memory tests
D  They were asked to take two pills of flavones capsules per day
33．What's the similarity of the 2experiments？D
A Both use high-level flavones capsules
B The number of the subjects is the same
C Drinks and placebos are used in both experiments
D The subjects are divided into two groups in both experiments
34．Why will Dr．Manson carry out the four-year study？B
A To prove the first experiment is wrong
B To carry out the experiment further
C To test how much flavones can improve our memory．
D To show eating chocolate is better to improve memory．
35．What can we learn from the last paragraph？C
A It's not necessary for us to eat chocolate
B The more we eat flavones，the better our health will be
C In the future we can get flavones without eating chocolate
D  It's easy for people to get the same level of flavones given to the test subjects．

分析本文属于说明文阅读，作者通过这篇文章向我们说明了一项新的研究表示大量的黄酮类物质在可可，茶和一些蔬菜中被发现，而这些物质可以改善老年人的记忆障碍，因此作者告诉我们要多吃蔬菜．

解答 32．C 细节理解题，根据第二段Brain imaging and memory tests were given to each study subject before and after the study Dr．Small says that the subjects who had the high-level flavones drink showed much improvement on memorytests．可知在每个实验课题前后都要进行大脑图象和记忆测试，故选C．
33．D 细节理解题，根据第二段For a period of three months，some subjects got 900milligrams of flavones a day．可知前一个实验在三个月的时间内一些人每天服用900毫克黄酮，另一些人每天服用10毫克；根据第三段This study will use flavones capsules（胶囊） The study subjects will be divided into two groups and will take two pills per day．可知第二个实验也是被分成两组，故选D．
34．B 细节理解题，根据最后一段Similarity，Dr．says a cocoa-based flavones extract（提取）may be developed in the future But he says that more studies are needed to see how much flavones is good for our health．可知曼森博士需要更多的研究来表明吃多少黄酮对我们的身体是有好处的，故选B．
35．C 推理判断题，根据最后一段Dr．Manson says it's not necessary for people to start eating more chocolate，because 3person would have to eat a huge amount of chocolate to get the same level of flavones given to the Lest subjects．He adds many manufacturers have planned to remove the flavones from their chocolate products．可知在未来我们可能不吃巧克力就能摄取黄酮，故选C．

点评考查学生的细节理解和推理判断能力．做细节理解题时一定要找到文章中的原句，和题干进行比较，再做出正确选择．在做推理判断题时不要以个人的主观想象代替文章的事实，要根据文章事实进行合乎逻辑的推理判断．

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