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  3. More than a century after its discovery, Alzheimer’s disease(老年痴呆症)is still destroying people’s brains. But the research may off

More than a century after its discovery, Alzheimer’s disease(老年痴呆症)is still destroying people’s brains. But the research may off

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问题     More than a century after its discovery, Alzheimer’s disease(老年痴呆症)is still destroying people’s brains. But the research may offer hope for the future. Scientists have been【B1】______ for years to learn who may get Alzheimer’s disease. If the condition could be identified before its worst signs appear, people might get at least【B2】______medical help. There is no cure for Alzheimer’s, which steals people’s ability to 【B3】______ themselves. But treatment can slow its progress. Among older people, Alzheimer’s is the most common form of dementia(智力衰退), the loss of abilities needed for normal life. The best way to 【B4】______ the disease has been a medical examination of the brain after a person dies. Doctors say 【B5】______ to test the living have presented problems, like high costs for widespread use. Public and medical demand for a better way has been strong. Scientists have been working to produce a dependable test for the disease in the living. An【B6】______30 million people around the world have Alzheimer’s disease. In the United States alone, more than five million people【B7】______ this presently incurable brain disorder. Alzheimer’s affects memory and【B8】______—those qualities that make a person an individual. At first, people with the condition forget simple things. But as time passes, they forget more and more. They may forget what a key is used for. Yet another sign is struggling to find the right words to【B9】______thoughts or understand what is being discussed. Finally, people with Alzheimer’s seem to change. They may easily become angry and lose their ability to trust others. Alzheimer’s affects people of all races【B10】______. Yet women are more likely to develop the disease, partly because women generally live longer than men.
【B6】
选项
答案estimated
解析 由空格后的30 million people可知，空格处需填入一个形容词。结合录音可知，答案为estimated，意为“估计的，估算的”。
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