A. if there isn’t enough dopamine in your body B. what affects muscles all through your body C. which cannot be cured yet D.

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问题 A. if there isn’t enough dopamine in your body
B. what affects muscles all through your body
C. which cannot be cured yet
D. if you have a fixed or blank expression
E. which may be the first symptom you notice
F. what causes Parkinson’s disease
One of the most common signs of Parkinson’s is tremor,______.

选项

答案E

解析 短文第三段前两句指出“震颤也许是你注意到的第一个症状。虽然不是每个病人都会出现这种症状,但它是帕金森病最常见的症状”,故选E。
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