某飞机着陆滑行的路程s（米）与时间t（秒）的关系式为：s=60t﹣1.5t²，那么飞机着陆后滑行____ 米才能停止．

短文改错。

    Holidays are fun but they also give thieves a lot of chances steal____  things.Follow my advice, and you will safe____ during holidays. Even though you might be busy shop____, always notice what is going on around you____. You never know when someone might be trying to steal something from you pockets. Don't forget____  your bag in your car. It's also important to take care of your homes during the holidays.

世界最大的平原和高原都位于（  ）