简述耐药性的控制措施。
第九届全国人大常委会第二十三次会议决定
Which two options can be used as traffic descriptors when classifying and marking traffic? () ["incoming interface","Layer 2 differentiated services code point (DSCP)","Layer 3 IP precedence","outgoing interface"]
简述样品分析前处理的意义,主要方法有哪些?
简述地源热泵系统的形式。
皮带输送机的皮带连接一般采用粘接,请回答什么叫粘接?