2016年12月英语六级仔细阅读练习题（5）[1]

Section C　　Directions: There are 2passages in this section． Each passage is followed by some questions or unfinished statements． For each of them there are four choices marked A) , B) , C) and D) ． You should decide on the best choice and mark the corresponding letter on Answer Sheet 2 with a single line through the centre．　　Passage One　　Questions 56 to 60 are based on the following passage．　　Trying to quantify your aerobic fitness (有氧适能) is difficult since it usually requires access to an exercise-physiology lab. But researchers at the Norwegian University of Science and Technology have developed a low-tech means of precisely assessing aerobic fitness and estimating your "fitness age", or how well your body functions physically, relative to how well it should work, given your age．　　The researchers evaluated almost 5,000 Norwegians between the ages of 20 and 90, using mobile labs．They took about a dozen measurements, including height, body mass index, resting heart rate, HDL (高密度脂蛋白) and total cholesterol (胆固醇) levels． Each person also filled out a lifestyle questionnaire．Finally, each volunteer ran to the point of exhaustion on a treadmill (跑步机) to measure his or her peak oxygen intake (VO2 max) 一an indicator of fitness age, sine VO2 max is found to closely correlate with significantly increased life spans, even among the elderly or overweight．　　In order to figure out how to estimate VO2 max without a treadmill, the scientists examined the results to determine which of the data points were most useful． Surprisingly, they found that putting just five measurements--waist circumference (腰围) ; resting heart rate; frequency and intensity of exercise; age; and sex-r-into an formula allowed them to predict a person's VO2 max with great accuracy, according to their study published in Medicine & Science in Sports & Exercise．　　The researchers used the data set to make a table of the typical, desirable VO2 max for a healthy person at every age from 20 to大学英语四六级考试