下列不属于传染源的是() ["易感人群","受感染的动物","病原携带者","患者","隐性感染者"]
在石膏模型上制作后堤区时,最宽处的宽度为() ["1mm","3mm","5mm","8mm","10mm"]
主要存在于呼吸道和消化道的局部抗体是() ["IgA","IgE","IgD","IgG","IgM"]
局麻药的作用机制主要是() ["阻断钙离子通道","阻断钠离子通道","阻断钾离子通道","阻断镁离子通道","阻断氢离子通道"]
关于机泵检修后验收标准的叙述,不正确的是()。 ["运转平稳无杂音,真的符合要求","火嘴无堵塞,结焦","机件材料选用符合设计要求","附机达到完好"]
预制混凝土构件的运输与安装按()计算。