We ______ students, we ______ our school and our teachers.[ ]

A. are all, all like

B. are all, like all

C. all are, like all

D. all are, all like

大气酸沉降监测中，应每24h采样一次，一天有几次降水可合并为一个样，若遇连续几天下雨，上午9：00至次日上午9：00的降水视为一个样品。