易燃易爆介质的压力管道发生泄漏或爆炸后，易燃介质与空气混合达到一定浓度就会发生二次闪燃或爆炸，因此，必须（）。 ["禁止人员进入","立即进行带压堵漏","紧急停车并关闭上位阀门等切断介质来源","立即在周围进行禁火"]
遥测装置应不受传输（）、传输状态、电源和电路（）的影响。
定位销用于工件圆孔定位，其中，短圆柱销限制（）个自由度。 ["10","2","7","20"]
“T”管夹管期间和拔管后观察哪些情况：（） ["黄疸","发热","胆瘘","腹痛","胆汁性腹膜炎"]
What is the primary benefit of Cisco Smart Assist？（） [" quick access to online help"," reduce set-up time for new devices"," ease of call forwarding and paging"," simple configuration of network setting"]
简述学习方剂配方原理及结构。
