总排水口巴氏槽运行注意事项（）
A.定期清理槽内卫生
B.可以不用过多关注
C.24小时观察状况
参考答案：A
— ____________________
— A board, a light and desks. [ ]
A. What's in your classroom?
B. What's in your bag?
C. How many books?
赔偿请求人只能是自然人。
