题目

Dear p______, our bus is arriving at the last stop .Don't forget to take your luggage (行李) when you get off. 答案：【答案】passengers【解析】句意：亲爱的旅客，我们的巴士到达最后一站，下车时别忘了带你的行李。根据our bus is arriving at the last stop 和Don't forget to take your luggage可知，此处对乘客说的话，故填passengers。函数y=sinπc（x∈R）的部分图象如图所示，设O为坐标原点，P是图象的最高点，B是图象与x轴的交点，则tan∠OPB________．