找出所给问句的对应答语。
①Can I help you? ____ A. I'd like some oranges.
②What do you need? ____ B. Three.
③How many books do you want? ____ C. Yes, I think so.
④Is that all? ____ D. Yes, I need some milk.
⑤What would you like? ____ E. I need some fish.
班里有个学生看到哪个明星红火,她就关注哪个明星,整理明星档案,还常常把零花钱用来购买与这些明星有关的物品,下列行为和这名女生相同的是( )
①小刚看着同学在厕所偷着吸烟,他就觉得很酷,于是也跟着学习 ②十字路口遇到红灯,小铭看见大家停下来,也下车等候
③在公交车上,小明看见几个同学不给老人让座,自己也装着没看见 ④小李看见有些同学在自习课上说笑,也跟着学了,心想“又不是我一个
如图所示,桌面离地高度为h,质量为m的小球,从离桌面H高处由静止下落.若以桌面为参考平面,则小球落地时的重力势能及整个过程中小球重力做功分别为( )