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  3. The symptoms of Alzheimer’ s disease were long dismissed as normal consequences of human aging, but in the 1980’ s the disease c

The symptoms of Alzheimer’ s disease were long dismissed as normal consequences of human aging, but in the 1980’ s the disease c

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问题    The symptoms of Alzheimer’ s disease were long dismissed as normal consequences of human aging, but in the 1980’ s the disease came to be recognized as the most common cause of intellectual deterioration in the elderly and middle- aged. It is characterized by the death of nerve cells in the cerebral cortex -- the part of the brain involved in complex function.
   The major debilitating symptoms of Alzheimer’s disease include serous forgetfulness -- particularly about recent events--and confusion. At first, the individual experiences only minor and almost imperceptible symptoms that are often attributed to emotional upsets or other physical illnesses. Gradually, however, the person becomes more forgetful, and this may be reported by anxious relatives. The person may neglect to turn off the oven, may misplace things, any recheck to see if a task was done, may take longer to complete a chore that was previously routine, or may repeat already-answered questions. As the disease progresses, memory loss and such changes in personality, mood, and behavior, such as confusion, irritability, restlessness and agitation, are likely to appear. Judgment, concentration, orientation, writing, reading, speech, motor behavior and naming of objects may also be affected. Even when a loving and caring family is available to give support, the victim of Alzheimer’s disease is more likely to spend his or her last days in a nursing home or long-term care institution. At this time, there is no cure.
This passage implies that victims of Alzheimer’s disease may______.
选项 A、not remember childhood events
B、suffer a gradual worsening of cognitive functions
C、incur personality and behavioral changes
D、spend their last days in a long-term care institution
答案B
解析 推论题。A、C和D三项文中都有明确交待。从文中所列举的此病的发展看，从起初的健忘、迷茫到后来的失去记忆、性格、情感及行为上的变化，直至判断、读说写等能力受到影响，可以得出结论患此病的人在认知方面逐渐消退。
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