A:粒子一定带正电
B:粒子的运动是匀变速曲线运动
C:粒子从A点到B点运动过程中电势能增加
D:粒子从A点到B点运动过程中动能先减少后增大
—You bought the computer about nine years ago?
—Yes. _______ it's old, it still works well.
如图所示为一种温度自动报警器原理图,它的核心部件是一支顶端封有一段金属丝的水银温度计.关于此温度报警器的说法错误的是( )
录音中有一篇短文,是德州市第16中学校园广播电台播放的主题节目“Story Of The Week”,宗旨是宣传好人好事,培养学生的优秀道德品质.听广播两遍后,请你根据表格内容提示,记录相关信息,完成表格(每空一词).
Story Of The Week
Who
Zhang Ming in Class 6,Grade 9
When
on the afternoon of____26th
Where
around a corner on his way back home from school
What
found a ____lying on the ground
How
waited for one and a half ____but nobody came;
found a name card with a ____number;
called the man on the name card
The owner(主人)
wrote a ____to the school and thanked Zhang Ming
Comments(评价)
kind and honest
张华的爸爸是市场管理人员,一天,张华与爸爸讨论起市场与当地经济的关系。张华发表了以下看法。你认为正确的有( )
①市场是社会经济的晴雨表
②市场是社会经济的调节器
③市场是国家调控经济的重要手段
④市场与经济发展没有多大关系