48. The saturated media universe may have weakened our top-down focus.
解析:定位于D段第二句:We obviously need both for survival, whether in the wilds of prehistory or while crossing a street today, but our saturated media universe has perhaps privileged the latter form and is wiring our kids brains differently.
49. 8 to 18 years old children spend about 11 hours using media per day if each content stream is counted separately.
解析:定位于B段第3、4句:A Kaiser Family Foundation report released last year found that on average, children ages 8 to 18 spend 7 hours and 38 min. a day using entertainment media. And if you count each content stream separately- a lot kids, for example, text while watching TVthey are logging almost 11 hours of media usage a day.
50. According to Stone, adolescents may do better than their parent generation on learning how to prioritize tasks.
解析:定位于G段:Stone has observed something similar in technology use among adolescents:.. Perhaps this is a sign that our kids will be better than we are at learning how to prioritize taskssomething that will come in handy when they become workers and spouses and parents.
51. Focused learners can do high-level thinking and may get well-paying jobs more probably.
解析:定位于E段:Multitaskers reliance on rote habit would be all well and good if we want our offspring to work on assembly lines, but to do the kind of high-level thinking that experts agree will be key to getting well-paying jobs, wed better exercise our collective hippocampus.
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