细菌内毒素的特征是()。 ["只有革兰阴性菌产生","细菌在生长过程中释放","少数革兰阳性菌产生","抗原性强","不耐热"]
后乳化型渗透液中,一般也会有表面活性剂,其主要作用是() ["乳化","洗涤","润湿","消泡"]
SCADA系统不包括() ["调度端","被控端","通道","服务器"]
人行风门间距不小于()m ["5","8","10","15"]
在PTN的Wrapping环网保护中,当网络上节点检测到网络失效时,故障侧相邻节点通过下面哪个协议向相邻节点发出倒换请求() ["MPLS","OAM","APS","APM"]
分析周朴园的人物形象。