在活性污泥系统里,微生物的代谢需要N、P的营养物。
参考答案:错
—My recorder is broken. Could I use yours?
—_______, but you have to return it tomorrow.
A.I’m not sure
B.No problem
C.I’m sorry
D.I hope so
大型玻璃钢储罐罐底制作前,应将()表面清扫干净,不得有杂物。