常减压装置废水中主要污染物有（）
A.氰化物
B.苯
C.油
D.氨氮
参考答案：C
Kunming is very beautiful and I ______ it. [ ]
A. feel in love with
B. fall in like with
C. fall in love in
D. fall in love with
体温明显升高，一昼夜间温差不超过1℃，属于（）
A、稽留热
B.弛张热
C.间歇热
D.不规则热
E.回归热
