职称英语理工类b级|2017职称英语理工类B阅读试题3

Walking to Exercise the Brain

　　Do you think sitting and studying all the time will improve your grades?Think again．Getting some exercise may help，too．

　　New research with older people suggests that taking regular walks helps them pay attention better than if they didn't exercise．

　　Previous research had shown that mice learn，remember，and pay attention better after a few weeks of working out on a running wheel．Mice that exercise have greater blood flow to the brain than those who don't．Their brain cells also make more connections．

　　Neuroscientists from the University at Urbana-Champaign wanted to find out if the same thing is true for people．First，they measured the physical fitness of 41 adults，ages 58 to 77，after each per-son walked 1 mile．Then，participants looked at arrows on a computer sczeen and had to use com-puter keys to show which way one particular arrow was pointing．

　　Adults who were physically fit were faster at the arrow task，and their answers were just as ac- curate as their less-fit peers,the researchers found．The fitter participants also had more blood flow to a part of their brain responsible for paying attention and making decisions．

　　In a second study，15 elderly people who completed a 6-month aerobic-training course were fas-ter at attention tasks compared with 14 seniors who just did stretching and toning exercises for the same amount of time．

　　So，even going for a walk every 2 or 3 days forjust 10 to 45 minutes can help．That should be good news for your grandparents．

　　The effects of exercising on the brains of younger people haven't been studied yet．Still，it can't hurt to take occasional study breaks and go for a walk or run around with your friends．You might even do better in school．

　　Whatever you do，though，don't try to read and walk at the same time．You could end up hurting yourseff!

　　31．Walking regularly helps elderly people_______．

　　A．lose weight

　　B．become happier

　　C．concentrate better

　　D．look younger

　　32．After taking exercise for a few weeks，the mice were found to have_____．

　　A．higher blood pressure

　　B．faster heartbeat

　　C．more blood flow to the brain

　　D．better appearance

　　33．The first study on 41 elderly people found______．

　　A．the less-fit participants did arrow tasks faster

　　B．the fitter participants did arrow tasks faster

　　C．the less-fit participants gave more accurate answers

　　D．the fitter participants gave more accurate answers

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