Many people are worried about what
television has done to the generation of American children who have grown up
watching it. For one thing, recent studies show that TV weakens the ability to
imagine. Some teachers feel that television has taken away the child’s ability
to form mental pictures in his own mind, resulting in children who cannot
understand a simple story without pictures. Secondly, too much TV too early
usually causes children to be removed from real-life experiences. Thus, they
grow up to be passive watchers who can only respond to action, but not start
doing something actively. The third area for such a worrying situation is the
serious dissatisfaction frequently expressed by school teachers that children
show a low patience for the pains in learning. Because they have been used to
seeing results of all problems in 30 or A. what bad effects TV programs have on children B. how children like frightening TV programs C. how to prevent children from watching TV D. what teachers think of today’s children [单选题]( )定期或根据分支机构实际业务需求不定期开展认证考试。
A.每季度 B.每半年 C.每年 D.每两年 [多选题]千兆以太网和百兆以太网的共同特点是( )。
A.相同的数据格式 B.相同的物理层实现技术 C.相同的组网方法 D.相同的介质访问控制方法 [单选题]汽水共腾是指炉水含盐量达到或超过__________,使汽包水面上出现很厚的泡沫层而引起水位急剧________的现象。
A.临界值 B.膨胀 [单选题]双阀口式中继阀是( )的执行元件。
A.电空制动控制器 B.空气制动阀 C.电空制动控制器及空气制动阀 [判断题]6.()高速接触网接触线的高度一般为5.6m。
A.正确 B.错误 我来回答: 提交
|