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 theyre 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
On a September day in 1991, two Germans were climbing the mountain between Austria and Italy. High up on a mountain pass, they found the body of a man lying on the ice. At that height (10,499 feet, or 3,200 meters) , the ice is usually permanent, but 1991 had been an especially warm year. The mountain ice had melted more than just .usual and so the body had come to the surface.
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