(2008)图示拉杆承受轴向拉力P的作用,设斜截面m─m的面积为A,则σ=P/A为:() ["横截面上的正应力","斜截面上的正应力","斜截面上的应力","斜截面上的剪应力"]
下列哪种疾病已经列入我国的职业病名单()。 ["炭疽","病毒性肝炎","肺结核","流行性出血热","霍乱"]
峰电位的产生与哪种离子的平衡电位有关() ["K+","Na+","Ca2+","Cl-平衡电位","Mg2+平衡电位"]
代赭石宜采用的炮制方法是() ["扣锅煅法","酒炙法","煅淬法","炒焦法","明煅法"]
休克早期相当于微循环改变的() ["微循环收缩期","微循环痉挛期","微循环扩张期","微循环衰竭期","微循环抑制期"]
什么是再贴现率?