◎ 题干
     A recent study reveals that older people who walk faster may have a longer life.     1      
     Gathering information of 34,000 people aged 65 and above from nine studies, researchers have
found out that the average walking speed of a person is 0.92 meters or three feet in one second. 
     2      According to the report pace speed was said to be very significant in survival of elderly people
above 75. If there is an increase of 0.1 meter per second in pace speed,       3    
     Dr. Stephanie Studenski of the University of Pittsburgh, the leading author of the research said that
when a person walks, there is a required energy and movement control, including support and places
demands on organ systems that include the heart, lungs, musculoskeletal(骨骼的), nervous and
circulatory systems(循环系统).        4     
     If you walk slower than 0.6 meters or two feet in a second, chances are that your life will be cut short
    5      Pace speed is actually an indication of being healthy especially to older people.
A. the risks of death will be reduced to 12 percent.
B. the old people will be in danger of losing their lives.
C. Active walking is of high advantage in having a longer life.
D. There should be an effort in walking at a speed so that people will get used to it.
E. Long life means you have to take a long walk every day.
F. For the past 10 years, there were17,528 deaths reported
G. Slow walking would require higher cost of energy.
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◎ 知识点
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