损伤后容易出现喉狭窄的是（）。
A.气管
B.左、右主支气管
C.肺叶支气管
D.肺段支气管
E.环状软骨
参考答案：E
--- Is that the small town you often refer to?
----Right, just the one _______ you know I used to work for years.
A that B which C where D what
某制药企业年新鲜用水量为5万吨，废物排污系数为0.85，废水处理设施COD进口浓度为700mg/L，COD出口浓度为150mg/L。该制药企业COD去除量为( )。
A．23375 kg B．23375 000 kg C．23.375 kg D．233750 kg
