我国总量控制实施的三阶段分别为：（）。
参考答案：实行达标排放、实现目标总量控制、实现容量总量控制
Read and number. 读一读，标序号。
( ) No school? Then go to bed!
( ) I feel fine now.
( ) I can't go to school!
( ) Thanks, Dr. Liu! Good-bye!
( ) No fun! No playing! Okay?
( ) Oh, no! I feel sick! I cut my finger.
