生物湿法冶金的优点有哪些？
下列不属于中国人民银行的职能是（） 。 ["发行的银行","银行的银行","企业的银行","政府的银行"]
同生作用
酸奶原料均质的原理。
Which two subnetworks would be included in the summarized address of 172.31.80.0 /20?（） ["172.31.17.4\/30","172.31.51.16\/30","172.31.64.0\/18","172.31.80.0\/22","172.31.92.0\/22","172.31.192.0\/18"]
简述生物监测的优点和缺陷。
