如图所示，相距为d的两条水平虚线L₁、L₂之间是方向水平向里的匀强磁场，磁感应强度为B，正方形线圈abcd边长为L（L＜d），质量为m、电阻为R，将线圈在磁场上方h高处静止释放，cd边刚进入磁场时速度为v₀，cd边刚离开磁场时速度也为v₀，则线圈穿过磁场的过程中（从cd边刚进入磁场一直到ab边离开磁场为止）：（　　）

如图示意我国局部地区，图中有一座城市，被称为“春城”．这座城市应是（    ）

人民代表大会制度的运作过程，是人民当家作主行使国家权力的过程。（  ）

根据短文理解, 完成下列各题。

      One day, I was cooking with my friend Sandy in the kitchen. Suddenly, Sandy cut her finger. I went to her quickly. But to my surprise, I saw computer chips in her finger.

   “Now you know my secret, you have to die!” Sandy said and picked up the knife. “No, please, Sandy. Aren't we good friends?” I shouted. But before Sandy could say anything, she fainted.

    “Oh, Sandy!” I took her to hospital in a hurry. After a doctor checked her, he said, “I'm afraid we can't help her. Why don't you take her to a robot centre?”

      I hurried to a robot centre. A few days later, Sandy was well. She asked, ”Mary, why did you save me even after I tried to kill you? ”

“Because I'm sure you are my friend. Can you tell me where you are from?” “I'm from another planet. It's far from here. Thank you, my friend Now I see how friendly people are on the earth.”

      Two days later, a UFO came and picked her up. Since then I've never seen her.

依次填入下面一段文字横线处的语句，衔接最恰当的一组是（    ）

    文字记录语言，打破了语言交际中时间和空间的限制，在社会生活中起着重大作用，中小学生语文教学主要就是教学生识字、阅读、写作。        。       ；       。           。          。          。文字产生以后要随着语言的发展而演变，始终从属于语言，是一种辅助的交际工具。

①一个社会可以没有文字，但是不能没有语言

②文字是在语言的基础上产生的，只有几千年的历史

③但是，文字在交际中的重要性远不能和语言相比

④在文字产生以前，语言早已存在，估计有几十万年

⑤没有语言，社会就不能生存和发展

⑥今天世界上没有文字的语言比有文字的语言多得多