生物法处理渗滤液的难点是（）。
A.COD处理效率不高
B.氨氮的去除
C.不耐冲击负荷
D.出水不稳定
参考答案：B
Do you like to play ping-pong? [ ]
A. /
B. the
C. an
Which of the following is NOT true about the new capital according to the report a. It’s in the center area of South Korea. b. It has excellent transport and environmental conditions. c. The relocation will cost $94 million. d. It is not named yet.
