2 No one knows for sure what makes these nerve cells break down. But scientists are doing a lot of research to look for the answer. They are studying many possible causes, including agin g and poisons in the environment. Abnormal genes seem to lead to Parkinson's disease in some people. But so far, there is not enough proof to show that it is always inherited.
3 'rremor may be the first symptom you notice. It is one of the most common signs of the disease, although not everyone has it. More importantly, not everyone with a tremor has Parkinson's disease. Tremor often starts in just one arm or leg or only on one side of the body. It may be worse when you are awake but not moving the affected arm or leg. It may get better when you move the limb or you are asleep. In time, Parkinson's affects muscles all through your body, so it can lead to problems like trouble swallowing or constipation. In the later stages of the disease, a person with Parkinson's may have a fixed or blank expression, trouble speaking, and other problems. Some people also have a decrease in mental skills ( dementia).
4 At this time, there is no cure for Parkinson's disease. But there are several types of medicines that can control the symptoms and make the disease easier to live with. You may not even need treatment if your symptoms are mild. Your doctor may wait to prescribe medicines until your symptoms start to get in the way of your daily life. Your doctor will adjust your medicines as your symptoms get worse. You may need to take several medicines to get the best results.
23. Paragraph I_____________ .
24. Paragraph 2 _____________.
25. Paragraph 3_____________ .
26. Paragraph 4 _____________.
A. Tips for Patients with the Disease
B. Common Treatment for the Disease
C. Means of Diagnosis of the Disease
D. Typical Symptoms of the Disease
E. Possible Causes of the Disease
F. Definition of Parkinson's Disease
27. You'II find it hard to move the way you want to_____________ .
28. A lot of research is being done to find ou_____________t .
29. One of the most common signs of Parkinson's is tremor_____________.
30. A person with Parkinson's has to learn to live with the disease,_____________.
A. if there isn't enough dopamine m 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
第4部分:阅读理解 (第 31~45题,每题 3分 ,共 45分)
下面有3篇短文，每篇短文有5道题。请根据短文内容，为每题定1个最佳选项。
第一篇
Human Heart Can Make New Cells
Solving a longstanding mystery, scientists have found that the human heart continues to generate new cardiac cells throughout the life span, although the rate of new cell production slows with age.
The finding, published in the April 3 issue of Science, could open a new path for the treatment of heart diseases such as heart failure and heart attack ,experts say.
"We find that the beating cells in the heart, cardiomyocytes, are renewed, " said lead researcher Dr. Jonas Frisen, a professor of stem cell research at the Karolinska Institute in Stockholm, Sweden. "It has previously not been known whether we were limited to the cardiomyocytes we are bom with or if they could be renewed." he said.
The process of renewing these cells changes over time, Frisen added. In a 20-year-old, about 1 percent of cardiomyocytes are exchanged each year, but the turnover rate decreases with age to only 0. 45 percent by age 75.
"If we can understand how the generation of new cardiomyocytes is regulated , it may be potentially possible to develop pharmaceuticals that promote this process to stimulate regeneration after for example, a heart attack, " Frisen said.
That could lead to treatment that helps restore damaged hearts.
"A lot of people suffer from chronic heart failure," noted co-author Dr. Ratan Bhardwaj.
Ratan Bhardwaj, also from the Karolinska Institute. " Chronic heart failure arises from heart cells dying, "he said.
With this finding, scientists are "opening the door to potential therapies to having ourselves heal ourselves, " Bhardwaj said. " Maybe one could devise a pharmaceutical agent that would make heart cells make new and more cells to overcome the problem they are facing."
But barriers remain. According to Bhardwaj , scientists do not yet know how to increase heart cell production to a rate that would replace cells faster than they are dying off, especially in older patients with heart failure. In addition, the number of new cells the heart produces was estimated using healthy hearts-whether the rate of cell tumover in diseased hearts is the same remains unknown.
31. The human heart stops producing cardiac cells
A. when a person becomes old
B. as soon as a person gets sick
C. immediately after a person is born
D. once a person dies
32. The finding could prove to be useful to
A. the analysis of cardiac cells
B. the prevention of chronic diseases
C. the treatment of heart disease
D. the study of longstanding mysteries
33. In people in their mid-70s, only 0. 45 percent of cardiomyocytes _ .
A. are still functional
B. are reduced each year
C. are replaced each year
D. are damaged each year
34. Chronic heart failure is attributed to
A. the dying heart cells
B. the effect of pharmceutical
C. the weight of a patient
D. the life span of a person
35. It is not known yet if the rate of cell turnover in diseased hearts
A. is high enough to replace cells faster than they're dying off
B. is of any use to researchers
C. is the same as that in healthy hearts
D. changes over time
第二篇
The Ice Man
，2010年全国职称英语卫生类（B级）考试真题及答案