资讯

CNN1 年
More than a third of teens say they spend too much time on their ... - CNN
Nearly the same proportion of teens acknowledge that they spend “too much” time on their smartphones (38%) and social media (27%).
CNN3月
Nearly half of teens say social media is bad for youth mental ... - CNN
And now, nearly half of US teens say social media has a mostly negative effect on people their age — and almost the same proportion say they’re cutting back on social media use.
Inside Higher Ed8月
No change in elite college low-income enrollment since 1920s
The proportion of low- and middle-income students at highly selective colleges was the same in 2013 as it was 1923, despite a massive expansion in broad college access. During that century, the ...
Washington Examiner14 年
New Exit Poll Numbers: Under-30 Vote Same Proportion as It Was in 2006
voters under 30 made up 12 percent of the electorate. That’s the same proportion younger voters made up in 2006, not a single-point lower as previously and widely reported.
Houston Chronicle5月
Art and science illuminate the same subtle proportions in tree branches
The same principle appears in tree branches as well. The precise calibration of branch diameter leads to a hallmark of fractal shapes called scale invariance.