急性牙髓炎与急性根尖周炎鉴别的主要依据是() ["A．牙髓活力情况","B．疼痛的性质","C．有无龋齿","D．有无外伤","E．X线检查"]
危害最大的是() ["A．牙髓炎","B．根尖周炎","C．死髓牙","D．牙周炎","E．残根"]
蛋白质不变性又不沉淀是由于加入了()蛋白质变性但不沉淀是加入了() ["A．生理盐水","B．常温乙醇","C．加入2%醋酸后加热","D．高浓度硫酸铵","E．加热煮沸"]
如何鉴别急性牙髓炎患牙为上或下颌牙位可用() ["A．电诊法","B．X线片检查","C．染色法","D．麻醉法","E．嗅诊"]
翻译前体的RNA是()细胞内含量最多的RNA是()蛋白质翻译的模板是()核小体RNA是() ["A．hnRNA","B．mRNA","C．snRNA","D．rRNA","E．tRNA"]
变性()退火()延伸()
