【单选题】关于生物法除氮过程的说法,不正确的是
D.
硝化要维持足够的 DO ,反硝化可以低氧也可以无氧
【单选题】关于生物法除氮过程的说法,不正确的是
D.
硝化要维持足够的 DO ,反硝化可以低氧也可以有氧无氧交替
【判断题】There's only one fixed form of mind maps.
【简答题】经常项目是国际收支平衡表中______的项目,又分为______、______和______三个项目。
【多选题】关于生物法除氮过程的说法,正确的是( )
D.
硝化要维持足够的DO,反硝化可以低氧也可以无氧
【单选题】Woman: Professor Burnes seems to think there's only one way to write a paper, and that's her way!Man: No kidding? She sure wasn't like that last semester.Question: What can be inferred about Professor...
A.
She didn't require any papers last semester.
B.
She was more flexible last semester.
C.
She grades papers very quickly.
D.
She isn't teaching this semester.
【简答题】A.It's no use explaining the questions to him. B.There's only one point he doesn't understand. C.The question won't be on the exam. D.He doesn't want any help.