水环境容量分析中，一般选择( )作为废水排放总量控制指标。
A．COD
B．NH3--N
C．BOD
D．SS
参考答案：A,B
They didn't go to bed_____ the work was finished.
A．when
B．while
C．until
D．after
溶剂的温度对硫化氢的吸附和解吸有何影响？
