SUNNY SCHOOL
We are a bilingual(双语) school for children of 6-15. We want a cook, a library assistant, a sports coach(教练) and a language teacher.
| Job | Age | Language | Skill(技能) | Other term （其它条件） |
| Cook | 25-40 | Chinese | Cooking both Chinese food and western food | Healthy |
| Library assistant | 20-35 | Chinese
English | Having the knowledge（知识）of different kinds of books | Careful（细心） |
| Sports Coach | 20-40 | Chinese English | Majoring in （主修）physical education | Healthy
strong
|
| Teacher | --- | Chinese
English | Majoring in English | ----- |
根据招聘启事，选择最佳答案。
点出发，不断加速到
点，保持匀速到
点，减速滑到
点飞出。场地的两侧是圆弧
，已知
。
段是水平地面。假设运动员与滑雪板的质量为
，滑雪板与雪地间的动摩擦因数为
，运动员在运动过程中，所受的最大滑动摩擦力为
，关于