悬浮生长
参考答案：
在活性污泥法中，微生物形成絮状，悬浮在混合液中不停地与废水混合和接触。
.--- _______？
--- He is tall, strong and brave.
A．Do you like him
B．How do you like him
C．What is he like
D．What does he like
提速道岔两尖轨之间通过连接杆连接。（）
