关于类风湿性关节炎特点的叙述正确的是() ["局部性疾病","关节炎性改变","多表现在大关节","多呈非对称性","病程自限"]
健康道德的基本原则是:() ["人人健康,人人有责","人人有责,人人参与","健康为人人,人人为健康","人人健康,人人参与"]
丁字尺是供画水平线条用的。()
类风湿性关节炎时,软骨与骨的病变严重,常呈() ["水肿型","破坏型","创伤型","炎症型","增生型"]
女,15岁。1年前前牙碰伤未治,近3日牙龈肿痛不能咬物。查。牙冠近中切角折断。牙冠变黑,叩痛(++),Ⅰ°松动,唇侧牙龈红肿。该患牙应诊断为() ["外伤冠折","牙髓坏死","慢性牙髓炎","急性根尖炎","慢性根尖炎"]
阴离子交换器失效时,会出现电导率()的现象。