唾液的哪种作用可促进龋的发生() ["黏滞度高","溶菌酶含量高","流量和流速高","缓冲能力高","再矿化能力高"]
影响卫生总费用的因素有() ["物价上涨","居民对卫生服务需求的增长","医疗科学技术进步","疾病谱发生改变","就诊次数增加"]
脾破裂常伴有()。 ["气胸","左肋骨骨折","肝破裂","左肾挫伤","胃损伤"]
关于闭合性腹部损伤,空腔脏器穿孔与实质脏器破裂最好的鉴别方法是()。 ["B超检查","暴力作用的部位","休克出现时间的早晚","腹腔诊断性穿刺","腹膜刺激征的程度"]
下列关于唾液的论述哪一项是正确的() ["水占99.4%,固体物质占0.6%,pH平均6.75","水占99%,固体物质占1%,pH平均6.0","水占99.4%,固体物质占0.6%,pH平均7.0","水占99%,固体物质占1%,pH平均6.75","水占99.4%,固体物质占0.6%,pH平均6.0"]
伤寒病可有()。流行性脑脊髓膜炎可有()。