Many children like watching TV．It's very interesting and they can see a lot and know many things about other people．They can also learn from the radio．But they can learn easily with TV．Why? Because they can hear and watch at the same time．But they can't watch anything from the radio(收音机)．TV helps to open children's mind(思想)．They can find better ways to do things．

    Many children watch TV only on Saturday and Sunday nights．They are busy from Monday to Friday．But some children watch TV every night．They go to bed very late．It's not good for their eyes and health.

3月初小明家电能表的示数为 ，4月初电能表如图所示，本月他家共使用了____ 度电，他认真观察了几分钟，查出电能表的转盘转过60圈，则这几分钟内他家的用电器消耗的电能是____  J．

我国“全面实施一对夫妇可生育两个孩子政策，积极开展应对人口老龄化行动”。从哲学基本问题的角度看，“人口政策的调整” 体现了（    ）

①意识对物质具有反作用

②世界的本源是物质，物质决定意识

③思维和存在具有同一性

④思维是对存在的如实反映

关于声现象，下列说法中不正确的是  （      ）