- Mum, my little sister is crying all the time.

- Be ________! She feels sick. You should take good care of her.

设空间存在竖直向下的匀强电场和垂直纸面向里的匀强磁场，如图所示，已知一离子在电场力和洛仑兹力的作用下，从静止开始自A点沿曲线ACB运动，到达B点时速度为零，C点是运动的最低点，忽略重力，以下说法中正确的是（   ）

   Hi, I'm John. I had a good time last Sunday. I went to the nature park with my family, We saw the animals. The animals were so cute. I loved them verymuch. I took many pictures. In the afternoon, we went to the cinema. The film was so fun. Then we went home. My mother cooked good food for me. I was so happy. What about you? What did you do last weekend?

国民经济建设运动时期，规模较大的钢铁、机器、电工器材等厂大多数设在湖南，其余金属矿、煤矿、电厂多选择川、陕等内陆省份。电工器材厂，从原料和产品运销的角度来看设在武汉为宜，但却将其设在湘潭。这些举措(  )