慢性根尖周炎常有以下哪一种病史() ["A．自发性疼痛史","B．牙齿冷热敏感史","C．牙齿松动移位史","D．患牙反复疼痛、肿胀史","E．全身不适，淋巴结肿痛史"]
引起根尖周病的原因主要是感染，感染源主要是() ["A．牙周膜炎","B．牙周袋内容物","C．牙髓腔内容物","D．血源性","E．腺源性"]
根尖周炎疼痛最剧烈的阶段是() ["A．根尖脓肿","B．骨膜下脓肿","C．粘膜下脓肿","D．瘘管形成期","E．急性浆液期"]
TDM样品预处理时常用的提取方法有__________和__________。
()可承担各等级公路及其桥梁、隧道工程的施工。 ["特级企业","一级企业","二级企业","三级企业"]
药物在体内的基本过程是__________、__________、__________和__________。
