对下列有关实例形成原理的解释,正确的是() ["无子番茄的获得是利用了多倍体育种原理","培育无子西瓜是利用了单位体育种原理","培育青霉素高产苗株是利用了基因突变原理","“多利”羊获得是利用了杂交育种原理"]
急性腹膜炎伴休克() ["需紧急手术治疗","需待休克好转后才能手术治疗","待休克好转后手术治疗","一般不需手术治疗","一般不需特殊处理"]
煮沸灭菌时,海拔高度每增高300m,灭菌时间至少应延长() ["1min","2min","3min","4min","5min"]
关于贫血性心脏病,下列表现哪项不对() ["肺动脉段突出","左心房明显增大","双心室增大,以左心室为著","肺血正常或轻度增多","贫血纠正后,部分患者心影可恢复正常"]
穿无菌手术衣和带无菌手套后,被认为有菌的地带是() ["肩部以下、腰部以上","胸部、腰部","肩部以上、腰部以上","肩部以上、腰部以下","胸部以上、腰部以下"]
主轴的弯曲度如何检查?