C Too much TV-watching can harm children’s ability to learn and even reduce th
C Too much TV-watching can harm children’s ability to learn and even reduce their chances of getting a college degree,new studies suggest in the latest effort to examine the effects of television on children.
One of the studies looked at nearly 400northern California third-graders.Those with TVs in their bedrooms scored about eight points lower on math and language arts tests than children without bedroom TVs.
A second study ,looking at nearly 1000 grown-ups in New Zealand,found lower education levels among 26-year –olds who had watched lots of TV during childhood .But the results don’t prove that TV is the cause and don't ride out that alxeady poorly motivated youngstersC年轻人)may wash lots of TV.
Their study measured the TV habits of 26-year-olds between ages5 and 15. These with college degrees had watched拍average of tess than two hours ofTV per weekninght during childhood, compared with an averageofme than 2 1/2 hours fcf those wbe had no education beyond high school
In the California study, children with TVs in their rooms but no computer at home scored the lowest while those with no bedroom TV but who had home computers scored the highesl
While this study does not prove that bedroom TV sets caused the lower scores , it adds to accumulating fimiings that children shonldn't have TVs in their bedrooms
According to the Califomia study, the inw-scoring group might
A.have watched a lot of TV
B.not be interested ted in math
C.be unable to go to college
D.have had computers in their bedrooms
函数f(x)=x^2 -4x -4在闭区间t,t+1 (t∈R)上的最小值记为g(t).(1)试写 数学 2020-04-05 …
函数f(x)=x^2-4x-4在闭区间[t,t+1](t∈R)上的最小值记为g(t)1).,求g( 数学 2020-05-15 …
关于微积分设f(x),g(x)在[a,b]上连续,在(a,b)内可微,证明存在t∈(a,b),使f 数学 2020-06-10 …
∫(1,x^2)(x^2-t)g(t)dt这积分怎么求导?我有点奇怪我知道变上限积分,因为是对t求 数学 2020-06-10 …
f(x)=1/3x^3-x-1.f(x)在t≤x≤t+3上最大值为M(t),最小值为m(t)记g( 数学 2020-07-13 …
matlab求解二阶导数方程,四个方程四个未知量>>symst>>E=32;G=10.81;b=2 数学 2020-07-19 …
设f(x),g(x)在[a,b]上连续,在(a,b)内可导,且g(x)不等于0,f(a)g(b)= 数学 2020-07-21 …
碱基计算的规律.①A等于T,G等于C,A+G=T+CA+G/T+C等1.②一条单链的A+G/T+C的 物理 2020-11-27 …
对函数f(x)=x+1作代换x=g(t),则不会改变函数f(x)的值域的代换是()A.g(t)=lo 其他 2021-01-07 …
对函数f(x)=3x2+ax+b作代换x=g(t),则总不改变f(x)值域的代换是()A.g(t)= 其他 2021-01-07 …