第3题
B、培养后的DO小于0.5mg/L
C、培养前后DO的降低不小于2mg/L
D、含有微生物
第5题
A.pH、DO、CODCr、BOD5、TN、TP
B.氨氮、叶绿素A.透明度
C.pH、DO、CODCr、BOD5、DO、TN、TP、透明度
D.pH、DO、CODCr、BOD5、DO、TN、TP、SS、TDS
第6题
A.43.65mg/L,1.66mg/L
B.43.65mg/L,1.32mg/L
C.45.05mg/L,1.32mg/L
D.45.05mg/L,1.66mg/L
第7题
HELEN:【D5】______DO YOU STUDY CHINESE AT THE UNIVERSITY HERE? ROSE: YES, I DO. BUT MY CHARACTERS ARE VERY BA
D. HELEN: 【D6】______ ROSE: ARE YOU CHINESE? HELEN: YES, I A
M. I CAME HERE TO STUDY POLITICAL SCIENC
E. ROSE: 【D7】______ HELEN: I LIKE IT SO FAR. BUT MY ENGLISH STILL NEEDS WOR
K. A. IT TAKES A LONG TIME TO LEARN CHINESE WRITIN
G.
B. HOW ARE YOU DOING?
C. HOW DO YOU LIKE IT?
D. EXCUSE M
E.
第8题
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