火车以12 m/s的速度进站后匀减速滑行，加速度，经4 s后速度减至______
题型：填空题
问题：
火车以12 m/s的速度进站后匀减速滑行，加速度
，经4 s后速度减至_____________m/s，再经_____________s火车恰好停止。
题型：填空题
| 根据短文内容在下面每个句子的空格中填上一个单词，使其意思与原文相符。 | ||
performance. Everyone stood up and cheered. They got the second place, but in everyone's heart, they were the best. They showed their great courage (勇气) to the world. And they told people that success belongs to (属于) the persevering (坚持). | ||
| 1. The two skaters are from _______. 2. They _______ a silver medal in the 2006 Winter Olympic Games. 3. They _______ to the ice field bravely, though Zhang Dan was badly hurt. 4. All the actions were done _______ after they went on with the show. 5. _______ was moved by their great courage. |
