31.Which of the following is the best title of the text?
A.Cellphones Warning Diseases
B.Cellphones Limiting Mobility
C.A Cure for Cellphone Problems
D.An Experiment on Cellphones
答案:A
解析:主旨大意题。本文主要介绍了通过分析手机的使用数据可以监测疾病发生的研究成果,因此A项最具概括性。
32.
D
Sitting for more than three hours a day can decrease a person’s life expectancy(预期寿命) by two years,even if he or she is physically active and gets rid of dangerous habits like smoking,according to a study.Watching TV for more than two hours a day can worsen that problem,decreasing life expectancy by another 1.4 years.
The analysis comes just two years after Australian researchers found that people who said they watched TV for more than four hours a day were 46% more likely to die of any cause than people who said they spent less than two hours a day watching TV.Those watching TV for more than four hours a day were also 80% more likely to die of cardiovascular(心血管的)disease.“Sedentary(久坐的) behavior is something we need to pay attention to,beyond telling people to get 30 minutes of activity a day,”said Peter T.Katzmarzyk,one of the lead researchers.But while the evidence of illnesses is increasing,it remains difficult for many people to find time to get on their feet,especially if they do desk jobs.
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