外科脓肿形成的原因是（） ["继发于化脓性感染","局部血肿","局部异物存留","远处感染灶经血流转移","局部囊肿"]
肺内团块状阴影，轮廓清楚、光滑，密度均匀，常有钙化，呈少量至大量斑点状或爆米花状，无空洞形成，应诊断为（） ["结核球","周围型肺癌","炎性假瘤","肺囊肿","错构瘤"]
治疗休克时补充血容量，一般首选（） ["电解质溶液","10%葡萄糖溶液","全血","右旋糖酐","5%碳酸氢钠"]
膝关节半月板损伤的诊断依据有（） ["A.有关节绞锁史","B.关节间隙有压痛点","C.研磨试验阳性","D.回旋挤压试验阴性","E.外翻实验阳性"]
脱疽证见皮肤干燥，毫发脱落，趾甲增厚变形，肌肉萎缩，趾呈干性坏疽，口干欲饮，便秘溲赤，舌红，苔黄，脉弦细数，治宜（） ["清热利湿，活血化瘀","益气养阴，活血化瘀","清热解毒，养阴活血","活血化瘀，通络止痛","温阳散寒，活血通络"]
一次风机跳闸首出有哪些？
